/*
vector.c
Ruby/GSL: Ruby extension library for GSL (GNU Scientific Library)
(C) Copyright 2001-2006 by Yoshiki Tsunesada
Modified by Seiya Nishizawa 14/Apr/2004
Ruby/GSL is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY.
*/
#include "rb_gsl_config.h"
#include "rb_gsl_array.h"
#include "rb_gsl_histogram.h"
#include "rb_gsl_complex.h"
#include "rb_gsl_poly.h"
#ifdef HAVE_NARRAY_H
#include "rb_gsl_with_narray.h"
#endif
VALUE rb_gsl_vector_inner_product(int argc, VALUE *argv, VALUE obj);
static VALUE rb_gsl_vector_product_to_m(int argc, VALUE *argv, VALUE obj);
VALUE rb_gsl_vector_int_to_f(VALUE obj);
VALUE rb_ary_to_gv(VALUE klass, VALUE ary);
static VALUE rb_gsl_vector_Xspace(double min, double max, int i,
gsl_vector* (*f)(const double, const double, const size_t))
{
gsl_vector *v = NULL;
size_t n;
if (i <= 0) rb_raise(rb_eArgError, "npoints must be greater than 0");
n = (size_t) i;
if (n == 1 && min != max) rb_raise(rb_eArgError, "npoints is 1, but x1 != x2");
v = (*f)(min, max, n);
return Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, v);
}
static gsl_vector* gsl_vector_linspace(const double min,
const double max, const size_t n)
{
gsl_vector *v = NULL;
double dx;
size_t i;
v = gsl_vector_alloc(n);
if (n > 1) {
dx = (max - min)/(n-1);
gsl_vector_set(v, 0, min);
for (i = 1; i < n-1; i++) gsl_vector_set(v, i, i*dx + min);
gsl_vector_set(v, n-1, max);
} else {
gsl_vector_set(v, 0, min);
}
return v;
}
static gsl_vector* gsl_vector_logspace(const double min,
const double max, const size_t n)
{
gsl_vector *v = NULL;
double dx;
size_t i;
v = gsl_vector_alloc(n);
if (n > 1) {
dx = (max - min)/(n-1);
gsl_vector_set(v, 0, pow(10.0, min));
for (i = 1; i < n-1; i++) gsl_vector_set(v, i, pow(10.0, dx*i + min));
gsl_vector_set(v, n-1, pow(10.0, max));
} else {
gsl_vector_set(v, 0, pow(10.0, min));
}
return v;
}
static VALUE rb_gsl_vector_linspace(int argc, VALUE *argv, VALUE klass)
{
size_t n = 10;
switch (argc) {
case 3:
CHECK_FIXNUM(argv[2]);
n = (size_t) FIX2UINT(argv[2]);
break;
case 2:
/* do nothing */
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)");
break;
}
Need_Float(argv[0]); Need_Float(argv[1]);
return rb_gsl_vector_Xspace(NUM2DBL(argv[0]), NUM2DBL(argv[1]), n,
gsl_vector_linspace);
}
static VALUE rb_gsl_vector_logspace(int argc, VALUE *argv, VALUE klass)
{
size_t n = 10;
switch (argc) {
case 3:
CHECK_FIXNUM(argv[2]);
n = (size_t) FIX2INT(argv[2]);
break;
case 2:
/* do nothing */
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)");
break;
}
Need_Float(argv[0]); Need_Float(argv[1]);
return rb_gsl_vector_Xspace(NUM2DBL(argv[0]), NUM2DBL(argv[1]), n,
gsl_vector_logspace);
}
static VALUE rb_gsl_vector_logspace2(int argc, VALUE *argv, VALUE klass)
{
size_t n = 10;
switch (argc) {
case 3:
CHECK_FIXNUM(argv[2]);
n = (size_t) FIX2INT(argv[2]);
break;
case 2:
/* do nothing */
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)");
break;
}
Need_Float(argv[0]); Need_Float(argv[1]);
return rb_gsl_vector_Xspace(log10(NUM2DBL(argv[0])),
log10(NUM2DBL(argv[1])), n,
gsl_vector_logspace);
}
/********************************************************/
VALUE rb_gsl_vector_do_something(VALUE obj, void (*func)(gsl_vector*));
/* singleton */
enum {
GSL_VECTOR_ADD,
GSL_VECTOR_SUB,
GSL_VECTOR_MUL,
GSL_VECTOR_DIV,
};
static VALUE rb_gsl_vector_arithmetics(int flag, VALUE obj, VALUE bb)
{
gsl_vector *v = NULL, *vnew = NULL, *b = NULL;
gsl_vector_complex *cvnew = NULL, *cb = NULL;
gsl_complex *c = NULL;
Data_Get_Struct(obj, gsl_vector, v);
switch (TYPE(bb)) {
case T_FLOAT:
case T_FIXNUM:
switch (flag) {
case GSL_VECTOR_ADD:
vnew = make_vector_clone(v);
gsl_vector_add_constant(vnew, NUM2DBL(bb));
break;
case GSL_VECTOR_SUB:
vnew = make_vector_clone(v);
gsl_vector_add_constant(vnew, -NUM2DBL(bb));
break;
case GSL_VECTOR_MUL:
vnew = make_vector_clone(v);
gsl_vector_scale(vnew, NUM2DBL(bb));
break;
case GSL_VECTOR_DIV:
vnew = make_vector_clone(v);
gsl_vector_scale(vnew, 1.0/NUM2DBL(bb));
break;
}
if (!VECTOR_VIEW_P(obj))
return Data_Wrap_Struct(CLASS_OF(obj), 0, gsl_vector_free, vnew);
else
return Data_Wrap_Struct(VECTOR_ROW_COL(obj), 0, gsl_vector_free, vnew);
break;
default:
if (VECTOR_INT_P(bb)) bb = rb_gsl_vector_int_to_f(bb);
if (VECTOR_P(bb)) {
Data_Get_Struct(bb, gsl_vector, b);
switch (flag) {
case GSL_VECTOR_ADD:
vnew = make_vector_clone(v);
gsl_vector_add(vnew, b);
break;
case GSL_VECTOR_SUB:
vnew = make_vector_clone(v);
gsl_vector_sub(vnew, b);
break;
case GSL_VECTOR_MUL:
vnew = make_vector_clone(v);
gsl_vector_mul(vnew, b);
break;
case GSL_VECTOR_DIV:
vnew = make_vector_clone(v);
gsl_vector_div(vnew, b);
break;
}
if (!VECTOR_VIEW_P(obj))
return Data_Wrap_Struct(CLASS_OF(obj), 0, gsl_vector_free, vnew);
else
return Data_Wrap_Struct(VECTOR_ROW_COL(obj), 0, gsl_vector_free, vnew);
} else if (VECTOR_COMPLEX_P(bb)) {
Data_Get_Struct(bb, gsl_vector_complex, cb);
cvnew = vector_to_complex(v);
switch (flag) {
case GSL_VECTOR_ADD:
gsl_vector_complex_add(cvnew, cb);
break;
case GSL_VECTOR_SUB:
gsl_vector_complex_sub(cvnew, cb);
break;
case GSL_VECTOR_MUL:
gsl_vector_complex_mul(cvnew, cb);
break;
case GSL_VECTOR_DIV:
gsl_vector_complex_div(cvnew, cb);
break;
}
if (VECTOR_COL_P(obj))
return Data_Wrap_Struct(cgsl_vector_complex_col, 0, gsl_vector_complex_free, cvnew);
else
return Data_Wrap_Struct(cgsl_vector_complex, 0, gsl_vector_complex_free, cvnew);
} else if (COMPLEX_P(bb)) {
Data_Get_Struct(bb, gsl_complex, c);
cvnew = vector_to_complex(v);
switch (flag) {
case GSL_VECTOR_ADD:
gsl_vector_complex_add_constant(cvnew, *c);
break;
case GSL_VECTOR_SUB:
gsl_vector_complex_add_constant(cvnew, gsl_complex_negative(*c));
break;
case GSL_VECTOR_MUL:
gsl_vector_complex_scale(cvnew, *c);
break;
case GSL_VECTOR_DIV:
gsl_vector_complex_scale(cvnew, gsl_complex_inverse(*c));
break;
}
if (VECTOR_COL_P(obj))
return Data_Wrap_Struct(cgsl_vector_complex_col, 0, gsl_vector_complex_free, cvnew);
else
return Data_Wrap_Struct(cgsl_vector_complex, 0, gsl_vector_complex_free, cvnew);
} else {
rb_raise(rb_eTypeError, "wrong type argument %s", rb_class2name(CLASS_OF(bb)));
}
break;
}
/* never reach here */
return Qnil;
}
VALUE rb_gsl_vector_add(VALUE obj, VALUE b)
{
return rb_gsl_vector_arithmetics(GSL_VECTOR_ADD, obj, b);
}
VALUE rb_gsl_vector_sub(VALUE obj, VALUE b)
{
return rb_gsl_vector_arithmetics(GSL_VECTOR_SUB, obj, b);
}
gsl_vector* mygsl_vector_mul_matrix(gsl_vector *v, gsl_matrix *m);
VALUE rb_gsl_vector_mul(VALUE obj, VALUE b)
{
VALUE argv[2];
gsl_vector *v, *vnew;
gsl_matrix *m;
if (VECTOR_ROW_P(obj) && VECTOR_COL_P(b)) {
argv[0] = obj;
argv[1] = b;
return rb_gsl_vector_inner_product(2, argv, CLASS_OF(obj));
}
if (VECTOR_ROW_P(obj) && MATRIX_P(b)) {
Data_Get_Struct(obj, gsl_vector, v);
Data_Get_Struct(b, gsl_matrix, m);
vnew = mygsl_vector_mul_matrix(v, m);
return Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, vnew);
}
if (VECTOR_COL_P(obj) && VECTOR_ROW_P(b)) {
argv[0] = obj;
argv[1] = b;
return rb_gsl_vector_product_to_m(2, argv, CLASS_OF(obj));
}
return rb_gsl_vector_arithmetics(GSL_VECTOR_MUL, obj, b);
}
VALUE rb_gsl_vector_div(VALUE obj, VALUE b)
{
return rb_gsl_vector_arithmetics(GSL_VECTOR_DIV, obj, b);
}
VALUE rb_ary_to_gv0(VALUE ary)
{
gsl_vector *v = NULL;
size_t i, size;
size = RARRAY(ary)->len;
v = gsl_vector_alloc(size);
if (v == NULL) rb_raise(rb_eNoMemError, "gsl_vector_alloc failed");
for (i = 0; i < size; i++) {
gsl_vector_set(v, i, NUM2DBL(rb_ary_entry(ary, i)));
}
return Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, v);
}
VALUE rb_ary_to_gv(VALUE klass, VALUE ary)
{
gsl_vector *v = NULL;
size_t i, size;
size = RARRAY(ary)->len;
v = gsl_vector_alloc(size);
if (v == NULL) rb_raise(rb_eNoMemError, "gsl_vector_alloc failed");
for (i = 0; i < size; i++) {
gsl_vector_set(v, i, NUM2DBL(rb_ary_entry(ary, i)));
}
return Data_Wrap_Struct(klass, 0, gsl_vector_free, v);
}
VALUE rb_gsl_range_to_gv(VALUE obj)
{
int beg, en;
size_t n, i;
gsl_vector *v = NULL;
beg = NUM2INT(rb_ivar_get(obj, rb_gsl_id_beg));
en = NUM2INT(rb_ivar_get(obj, rb_gsl_id_end));
if (RTEST(rb_ivar_get(obj, rb_gsl_id_excl))) n = en - beg;
else n = en - beg + 1;
v = gsl_vector_alloc(n);
for (i = 0; i < n; i++) gsl_vector_set(v, i, beg + i);
return Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, v);
}
gsl_vector_view* gsl_vector_view_alloc()
{
gsl_vector_view *vv = NULL;
vv = ALLOC(gsl_vector_view);
if (vv == NULL) rb_raise(rb_eNoMemError, "malloc failed");
vv->vector.owner = 0;
return vv;
}
void gsl_vector_view_free(gsl_vector_view * vv)
{
free((gsl_vector_view *) vv);
}
static VALUE rb_gsl_vector_to_complex(VALUE obj)
{
gsl_vector *v = NULL;
gsl_vector_complex *cv = NULL;
gsl_complex z;
size_t i;
double x;
Data_Get_Struct(obj, gsl_vector, v);
cv = gsl_vector_complex_alloc(v->size);
for (i = 0; i < v->size; i++) {
x = gsl_vector_get(v, i);
z.dat[0] = x;
z.dat[1] = 0;
gsl_vector_complex_set(cv, i, z);
}
if (VECTOR_COL_P(obj))
return Data_Wrap_Struct(cgsl_vector_complex_col, 0, gsl_vector_complex_free, cv);
else
return Data_Wrap_Struct(cgsl_vector_complex, 0, gsl_vector_complex_free, cv);
}
static VALUE rb_gsl_vector_to_complex2(VALUE obj)
{
gsl_vector *v = NULL;
gsl_vector_complex *cv = NULL;
gsl_complex z;
size_t i;
double re, im;
Data_Get_Struct(obj, gsl_vector, v);
cv = gsl_vector_complex_alloc(ceil((double)v->size/2));
for (i = 0; i < v->size; i += 2) {
re = gsl_vector_get(v, i);
if (i+1 == v->size) im = 0.0;
else im = gsl_vector_get(v, i+1);
z.dat[0] = re;
z.dat[1] = im;
gsl_vector_complex_set(cv, i/2, z);
}
if (VECTOR_COL_P(obj))
return Data_Wrap_Struct(cgsl_vector_complex_col, 0, gsl_vector_complex_free, cv);
else
return Data_Wrap_Struct(cgsl_vector_complex, 0, gsl_vector_complex_free, cv);
}
static VALUE rb_gsl_vector_coerce(VALUE obj, VALUE other)
{
gsl_vector *v = NULL, *vnew = NULL;
gsl_vector_complex *cv = NULL;
gsl_complex *c = NULL;
VALUE vv;
Data_Get_Struct(obj, gsl_vector, v);
switch (TYPE(other)) {
case T_FLOAT:
case T_FIXNUM:
vnew = gsl_vector_alloc(v->size);
if (vnew == NULL) rb_raise(rb_eNoMemError, "gsl_vector_alloc failed");
gsl_vector_set_all(vnew, NUM2DBL(other));
vv = Data_Wrap_Struct(VECTOR_ROW_COL(obj), 0, gsl_vector_free, vnew);
return rb_ary_new3(2, vv, obj);
break;
default:
if (COMPLEX_P(other)) {
Data_Get_Struct(other, gsl_complex, c);
cv = gsl_vector_complex_alloc(v->size);
if (cv == NULL) rb_raise(rb_eNoMemError, "gsl_vector_alloc failed");
gsl_vector_complex_set_all(cv, *c);
if (VECTOR_ROW_P(obj))
vv = Data_Wrap_Struct(cgsl_vector_complex, 0, gsl_vector_complex_free, cv);
else
vv = Data_Wrap_Struct(cgsl_vector_complex_col, 0, gsl_vector_complex_free, cv);
return rb_ary_new3(2, vv, obj);
} else if (VECTOR_COMPLEX_P(other)) {
cv = vector_to_complex(v);
if (VECTOR_ROW_P(obj))
vv = Data_Wrap_Struct(cgsl_vector_complex, 0, gsl_vector_complex_free, cv);
else
vv = Data_Wrap_Struct(cgsl_vector_complex_col, 0, gsl_vector_complex_free, cv);
return rb_ary_new3(2, other, vv);
} else {
rb_raise(rb_eTypeError, "cannot coerced");
}
break;
}
return Qnil; /* never reach here */
}
static VALUE rb_gsl_vector_product_to_m(int argc, VALUE *argv, VALUE obj)
{
gsl_vector *v = NULL, *v2 = NULL;
gsl_matrix *m = NULL;
size_t i, j;
switch (TYPE(obj)) {
case T_MODULE:
case T_CLASS:
case T_OBJECT:
if (argc != 2) rb_raise(rb_eArgError, "wrong number of arguments (%d for 2)",
argc);
if (!VECTOR_COL_P(argv[0]))
rb_raise(rb_eTypeError, "wrong argument type %s (GSL::Vector::Col expected)",
rb_class2name(CLASS_OF(argv[0])));
if (!VECTOR_ROW_P(argv[1]))
rb_raise(rb_eTypeError, "wrong argument type %s (GSL::Vector expected)",
rb_class2name(CLASS_OF(argv[1])));
Data_Get_Struct(argv[0], gsl_vector, v);
Data_Get_Struct(argv[1], gsl_vector, v2);
break;
default:
if (argc != 1) rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)",
argc);
if (!VECTOR_COL_P(obj))
rb_raise(rb_eTypeError, "wrong argument type %s (GSL::Vector::Col expected)",
rb_class2name(CLASS_OF(obj)));
if (!VECTOR_ROW_P(argv[0]))
rb_raise(rb_eTypeError, "wrong argument type %s (GSL::Vector expected)",
rb_class2name(CLASS_OF(argv[0])));
Data_Get_Struct(obj, gsl_vector, v);
Data_Get_Struct(argv[0], gsl_vector, v2);
break;
}
m = gsl_matrix_alloc(v->size, v2->size);
for (i = 0; i < v->size; i++) {
for (j = 0; j < v2->size; j++) {
gsl_matrix_set(m, i, j, gsl_vector_get(v, i)*gsl_vector_get(v2, j));
}
}
return Data_Wrap_Struct(cgsl_matrix, 0, gsl_matrix_free, m);
}
static VALUE rb_gsl_vector_to_f(VALUE obj)
{
return obj;
}
VALUE rb_gsl_vector_to_i(VALUE obj)
{
gsl_vector *v = NULL;
gsl_vector_int *vi = NULL;
size_t i;
int val;
Data_Get_Struct(obj, gsl_vector, v);
vi = gsl_vector_int_alloc(v->size);
for (i = 0; i < v->size; i++) {
val = (int) gsl_vector_get(v, i);
gsl_vector_int_set(vi, i, val);
}
if (VECTOR_COL_P(obj))
return Data_Wrap_Struct(cgsl_vector_int_col, 0, gsl_vector_int_free, vi);
else
return Data_Wrap_Struct(cgsl_vector_int, 0, gsl_vector_int_free, vi);
}
/* singleton */
static void draw_hist(VALUE obj, FILE *fp);
static void draw_vector(VALUE obj, FILE *fp);
static void draw_vector2(VALUE xx, VALUE yy, FILE *fp);
static void draw_vector_array(VALUE ary, FILE *fp);
#ifdef HAVE_NARRAY_H
static void draw_narray(VALUE obj, FILE *fp);
#endif
static VALUE rb_gsl_vector_graph2(int argc, VALUE *argv, VALUE obj)
{
#ifdef HAVE_GNU_GRAPH
size_t i, iend, j, n = 0;
gsl_vector *x = NULL, *y = NULL;
gsl_histogram *h = NULL;
VALUE vx = (VALUE) NULL;
char command[1024];
int flag = 0;
FILE *fp = NULL;
if (argc < 1)
rb_raise(rb_eArgError, "two few arguments");
if (TYPE(argv[argc-1]) == T_STRING) {
sprintf(command, "graph -T X %s", STR2CSTR(argv[argc-1]));
iend = argc-1;
} else {
strcpy(command, "graph -T X -C -g 3");
iend = argc;
}
if (iend == 1) {
fp = popen(command, "w");
if (fp == NULL) rb_raise(rb_eIOError, "GNU graph not found.");
if (VECTOR_P(argv[0])) {
draw_vector(argv[0], fp);
} else if (HISTOGRAM_P(argv[0])) {
draw_hist(argv[0], fp);
} else if (TYPE(argv[0]) == T_ARRAY) {
draw_vector_array(argv[0], fp);
#ifdef HAVE_NARRAY_H
} else if (NA_IsNArray(argv[0])) {
draw_narray(argv[0], fp);
#endif
} else {
if (fp) pclose(fp);
rb_raise(rb_eTypeError, "wrong argument type %s",
rb_class2name(CLASS_OF(argv[0])));
}
if (fp) pclose(fp);
return Qtrue;
} else {
fp = popen(command, "w");
if (fp == NULL) rb_raise(rb_eIOError, "GNU graph not found.");
if (VECTOR_P(argv[0])) {
Data_Get_Struct(argv[0], gsl_vector, x);
vx = argv[0];
n = x->size;
flag = 0;
} else if (HISTOGRAM_P(argv[0])) {
Data_Get_Struct(argv[0], gsl_histogram, h);
x = gsl_vector_alloc(h->n);
n = x->size;
for (j = 0; j < x->size; j++)
gsl_vector_set(x, j, h->range[j]);
flag = 1;
draw_hist(argv[0], fp);
fprintf(fp, "\n");
} else if (TYPE(argv[0]) == T_ARRAY) {
draw_vector_array(argv[0], fp);
fprintf(fp, "\n");
#ifdef HAVE_NARRAY_H
} else if (NA_IsNArray(argv[0])) {
vx = argv[0];
n = NA_TOTAL(argv[0]);
flag = 0;
#endif
} else if (NIL_P(argv[0])) {
if (argc < 2) rb_raise(rb_eArgError, "too few arguments");
if (VECTOR_P(argv[1])) {
Data_Get_Struct(argv[1], gsl_vector, y);
n = y->size;
} else if (HISTOGRAM_P(argv[1])) {
Data_Get_Struct(argv[1], gsl_histogram, h);
n = h->n;
#ifdef HAVE_NARRAY_H
} else if (NA_IsNArray(argv[1])) {
n = NA_TOTAL(argv[1]);
#endif
} else {
rb_raise(rb_eTypeError, "wrong argument type %s",
rb_class2name(CLASS_OF(argv[0])));
}
x = gsl_vector_alloc(n);
for (j = 0; j < n; j++) gsl_vector_set(x, j, (double) j);
flag = 1;
} else {
if (fp) pclose(fp);
rb_raise(rb_eTypeError, "wrong argument type %s",
rb_class2name(CLASS_OF(argv[0])));
}
if (flag == 1) vx = Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, x);
for (i = 1; i < iend; i++) {
if (VECTOR_P(argv[i])) draw_vector2(vx, argv[i], fp);
else if (HISTOGRAM_P(argv[i])) draw_hist(argv[i], fp);
else if (TYPE(argv[i]) == T_ARRAY) draw_vector_array(argv[i], fp);
#ifdef HAVE_NARRAY_H
else if (NA_IsNArray(argv[i])) draw_vector2(vx, argv[i], fp);
#endif
else
rb_raise(rb_eTypeError, "wrong argument type %s",
rb_class2name(CLASS_OF(argv[i])));
fprintf(fp, "\n");
fflush(fp);
}
fclose(fp);
return Qtrue;
}
return Qtrue;
#else
rb_raise(rb_eNoMethodError, "GNU plotutils required");
return Qfalse;
#endif
}
static void draw_vector(VALUE obj, FILE *fp)
{
gsl_vector *x = NULL;
size_t j;
Data_Get_Vector(obj, x);
for (j = 0; j < x->size; j++)
fprintf(fp, "%d %g\n", (int) j, gsl_vector_get(x, j));
fflush(fp);
}
static void draw_vector2(VALUE xx, VALUE yy, FILE *fp)
{
#ifdef HAVE_NARRAY_H
struct NARRAY *nax, *nay;
#endif
double *ptr1 = NULL, *ptr2 = NULL;
gsl_vector *vx, *vy;
size_t j, n, stridex = 1, stridey = 1;
if (VECTOR_P(xx)) {
Data_Get_Struct(xx, gsl_vector, vx);
ptr1 = vx->data;
n = vx->size;
stridex = vx->stride;
#ifdef HAVE_NARRAY_H
} else if (NA_IsNArray(xx)) {
GetNArray(xx, nax);
ptr1 = (double *) nax->ptr;
n = nax->total;
stridex = 1;
#endif
} else {
rb_raise(rb_eTypeError, "wrong argument type %s (Vector expected)",
rb_class2name(CLASS_OF(xx)));
}
if (VECTOR_P(yy)) {
Data_Get_Struct(yy, gsl_vector, vy);
ptr2 = vy->data;
n = vy->size;
stridey = vy->stride;
#ifdef HAVE_NARRAY_H
} else if (NA_IsNArray(yy)) {
GetNArray(yy, nay);
ptr2 = (double *) nay->ptr;
stridey = 1;
#endif
} else {
rb_raise(rb_eTypeError, "wrong argument type %s (Vector expected)",
rb_class2name(CLASS_OF(yy)));
}
for (j = 0; j < n; j++)
fprintf(fp, "%g %g\n", ptr1[j*stridex], ptr2[j*stridey]);
fflush(fp);
}
#ifdef HAVE_NARRAY_H
static void draw_narray(VALUE obj, FILE *fp)
{
struct NARRAY *na;
double *ptr;
size_t j;
GetNArray(obj, na);
ptr = (double *) na->ptr;
for (j = 0; j < na->total; j++)
fprintf(fp, "%d %g\n", (int) j, ptr[j]);
fflush(fp);
}
#endif
static void draw_hist(VALUE obj, FILE *fp)
{
gsl_histogram *h = NULL;
size_t j;
Data_Get_Struct(obj, gsl_histogram, h);
for (j = 0; j < h->n; j++) {
fprintf(fp, "%g %g\n%g %g\n",
h->range[j], h->bin[j], h->range[j+1], h->bin[j]);
}
fflush(fp);
}
static void draw_vector_array(VALUE ary, FILE *fp)
{
double *ptrx = NULL, *ptry = NULL, *ptrz = NULL;
VALUE vx;
size_t j, n, stridex, stridey, stridez;
int flag = 0;
switch (RARRAY(ary)->len) {
case 1:
flag = 1;
ptry = get_vector_ptr(rb_ary_entry(ary, 0), &stridey, &n);
break;
case 2:
ptry = get_vector_ptr(rb_ary_entry(ary, 1), &stridey, &n);
vx = rb_ary_entry(ary, 0);
if (NIL_P(vx)) {flag = 1;}
else {
ptrx = get_vector_ptr(vx, &stridex, &n);
}
break;
case 3:
ptrz = get_vector_ptr(rb_ary_entry(ary, 2), &stridez, &n);
ptry = get_vector_ptr(rb_ary_entry(ary, 1), &stridey, &n);
vx = rb_ary_entry(ary, 0);
if (NIL_P(vx)) {flag = 2;}
else {
ptrx = get_vector_ptr(vx, &stridex, &n);
flag = 3;
}
break;
default:
rb_raise(rb_eRuntimeError, "wrong array length (%d for 1 or 2)",
RARRAY(ary)->len);
break;
}
switch (flag) {
case 0:
for (j = 0; j < n; j++)
fprintf(fp, "%g %g\n", ptrx[j*stridex], ptry[j*stridey]);
break;
case 1:
for (j = 0; j < n; j++)
fprintf(fp, "%d %g\n", (int) j, ptry[j*stridey]);
break;
case 2:
for (j = 0; j < n; j++)
fprintf(fp, "%d %g %g\n", (int) j, ptry[j*stridey], ptrz[j*stridez]);
break;
case 3:
for (j = 0; j < n; j++)
fprintf(fp, "%g %g %g\n", ptrx[j*stridex], ptry[j*stridey], ptrz[j*stridez]);
break;
default:
break;
}
fflush(fp);
}
/* singleton */
static VALUE rb_gsl_vector_plot2(int argc, VALUE *argv, VALUE obj)
{
gsl_vector *x = NULL, *y = NULL, *xerr = NULL, *yerr = NULL;
FILE *fp = NULL;
size_t i, n;
char command[1024];
fp = popen("gnuplot -persist", "w");
if (fp == NULL) rb_raise(rb_eIOError, "GNU graph not found.");
strcpy(command, "plot '-'");
switch (argc) {
case 5:
if (TYPE(argv[4]) == T_STRING)
sprintf(command, "%s %s", command, STR2CSTR(argv[4]));
/* no break */
case 4:
if (TYPE(argv[3]) == T_STRING) {
sprintf(command, "%s %s", command, STR2CSTR(argv[3]));
} else if (VECTOR_P(argv[3])) {
Data_Get_Struct(argv[3], gsl_vector, yerr);
} else {
rb_raise(rb_eTypeError, "argv[3] wrong type %s (String or Vector expected)",
rb_class2name(CLASS_OF(argv[3])));
}
/* no break */
case 3:
if (TYPE(argv[2]) == T_STRING) {
sprintf(command, "%s %s", command, STR2CSTR(argv[2]));
} else if (VECTOR_P(argv[2])) {
Data_Get_Struct(argv[2], gsl_vector, xerr);
} else {
rb_raise(rb_eTypeError, "argv[2] wrong type %s (String or Vector expected)",
rb_class2name(CLASS_OF(argv[2])));
}
/* no break */
case 2:
if (TYPE(argv[1]) == T_STRING) {
sprintf(command, "%s %s", command, STR2CSTR(argv[1]));
} else if (VECTOR_P(argv[1])) {
Data_Get_Struct(argv[1], gsl_vector, y);
} else {
rb_raise(rb_eTypeError, "argv[1] wrong type %s (String or Vector expected)",
rb_class2name(CLASS_OF(argv[1])));
}
/* no break */
case 1:
if (TYPE(argv[0]) == T_STRING) {
sprintf(command, "%s %s", command, STR2CSTR(argv[0]));
} else if (VECTOR_P(argv[0])) {
Data_Get_Struct(argv[0], gsl_vector, x);
} else {
rb_raise(rb_eTypeError, "argv[0] wrong type %s (String or Vector expected)",
rb_class2name(CLASS_OF(argv[0])));
}
break;
default:
rb_raise(rb_eArgError, "wrong number of argumens (%d for 1 - 5)", argc);
break;
}
if (x == NULL) rb_raise(rb_eRuntimeError, "x data is not given");
n = x->size;
fprintf(fp, "%s\n", command);
for (i = 0; i < n; i++) {
if (y == NULL)
fprintf(fp, "%d %g\n", (int) i, gsl_vector_get(x, i));
else if (yerr == NULL)
fprintf(fp, "%g %g\n", gsl_vector_get(x, i), gsl_vector_get(y, i));
else if (xerr)
fprintf(fp, "%g %g %g %g\n", gsl_vector_get(x, i), gsl_vector_get(y, i),
gsl_vector_get(xerr, i), gsl_vector_get(yerr, i));
else
fprintf(fp, "%g %g %g\n", gsl_vector_get(x, i), gsl_vector_get(y, i),
gsl_vector_get(yerr, i));
}
fprintf(fp, "e\n");
fflush(fp);
pclose(fp);
fp = NULL;
return Qtrue;
}
static VALUE rb_gsl_vector_sqrt(VALUE obj)
{
gsl_vector *v = NULL, *vnew = NULL;
size_t i;
Data_Get_Vector(obj, v);
vnew = gsl_vector_alloc(v->size);
for (i = 0; i < v->size; i++) gsl_vector_set(vnew, i, sqrt(gsl_vector_get(v, i)));
return Data_Wrap_Struct(VECTOR_ROW_COL(obj), 0, gsl_vector_free, vnew);
}
static VALUE rb_gsl_vector_normalize(int argc, VALUE *argv, VALUE obj)
{
gsl_vector *v = NULL, *vnew = NULL;
double dnrm2, nrm;
switch (argc) {
case 0:
nrm = 1.0;
break;
case 1:
Need_Float(argv[0]);
nrm = NUM2DBL(argv[0]);
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 or 2)", argc);
break;
}
Data_Get_Vector(obj, v);
vnew = make_vector_clone(v);
dnrm2 = gsl_blas_dnrm2(vnew);
gsl_vector_scale(vnew, sqrt(nrm)/dnrm2);
return Data_Wrap_Struct(VECTOR_ROW_COL(obj), 0, gsl_vector_free, vnew);
}
static VALUE rb_gsl_vector_normalize_bang(int argc, VALUE *argv, VALUE obj)
{
gsl_vector *v = NULL;
double dnrm2, nrm;
switch (argc) {
case 0:
nrm = 1.0;
break;
case 1:
Need_Float(argv[0]);
nrm = NUM2DBL(argv[0]);
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 or 2)", argc);
break;
}
Data_Get_Vector(obj, v);
dnrm2 = gsl_blas_dnrm2(v);
gsl_vector_scale(v, sqrt(nrm)/dnrm2);
return obj;
}
#ifdef HAVE_NARRAY_H
static VALUE rb_gsl_vector_filescan_na(VALUE klass, VALUE file)
{
FILE *fp = NULL;
int nn;
char buf[1024], filename[1024], *p;
size_t n, lines, i, j;
double **ptr;
double val;
int shape[1];
VALUE ary, na;
Check_Type(file, T_STRING);
strcpy(filename, STR2CSTR(file));
sprintf(buf, "wc %s", filename);
fp = popen(buf, "r");
fgets(buf, 1024, fp);
pclose(fp);
sscanf(buf, "%d", &nn);
lines = (size_t) nn; /* vector length */
shape[0] = lines;
fp = fopen(filename, "r");
fgets(buf, 1024, fp);
n = count_columns(buf); /* number of vectors created */
ptr = (double**) xmalloc(sizeof(double**)*n);
ary = rb_ary_new2(n);
p = buf;
for (j = 0; j < n; j++) {
na = na_make_object(NA_DFLOAT, 1, shape, cNArray);
rb_ary_store(ary, j, na);
ptr[j] = NA_PTR_TYPE(na, double*);
p = str_scan_double(p, &val);
if (p) ptr[j][0] = val;
else break;
}
for (i = 1; i < lines; i++) {
fgets(buf, 1024, fp);
p = buf;
for (j = 0; j < n; j++) {
p = str_scan_double(p, &val);
if (p) ptr[j][i] = val;
else break;
}
}
fclose(fp);
free(ptr);
return ary;
}
#endif
static VALUE rb_gsl_vector_decimate(VALUE obj, VALUE nn)
{
gsl_vector *v = NULL, *vnew = NULL;
gsl_vector_view vv;
size_t i, n, n2, n3;
CHECK_FIXNUM(nn);
Data_Get_Vector(obj, v);
n = (size_t) FIX2INT(nn);
if (n > v->size)
rb_raise(rb_eArgError,
"decimation factor must be smaller than the vector length.");
if (n == 0) rb_raise(rb_eArgError, "decimation factor must be greater than 1");
n2 = (size_t) ceil((double)v->size/n);
vnew = gsl_vector_alloc(n2);
n3 = n - (n2*n - v->size);
for (i = 0; i < n2; i++) {
if (i == n2-1) vv = gsl_vector_subvector(v, i*n, n3);
else vv = gsl_vector_subvector(v, i*n, n);
gsl_vector_set(vnew, i, gsl_stats_mean(vv.vector.data, vv.vector.stride,
vv.vector.size));
}
return Data_Wrap_Struct(VECTOR_ROW_COL(obj), 0, gsl_vector_free, vnew);
}
static VALUE rb_gsl_vector_xxx(VALUE obj, double (*f)(double))
{
gsl_vector *v;
gsl_vector_int *vnew;
size_t i;
Data_Get_Struct(obj, gsl_vector, v);
vnew = gsl_vector_int_alloc(v->size);
for (i = 0; i < v->size; i++) {
gsl_vector_int_set(vnew, i, (int) (*f)(gsl_vector_get(v, i)));
}
return Data_Wrap_Struct(cgsl_vector_int, 0, gsl_vector_int_free, vnew);
}
static VALUE rb_gsl_vector_floor(VALUE obj)
{
return rb_gsl_vector_xxx(obj, floor);
}
static VALUE rb_gsl_vector_ceil(VALUE obj)
{
return rb_gsl_vector_xxx(obj, ceil);
}
#ifdef HAVE_ROUND
double round(double);
static VALUE rb_gsl_vector_round(VALUE obj)
{
return rb_gsl_vector_xxx(obj, round);
}
#endif
static VALUE rb_gsl_vector_dB(VALUE obj)
{
gsl_vector *v, *vnew;
double x;
size_t i;
Data_Get_Struct(obj, gsl_vector, v);
vnew = gsl_vector_alloc(v->size);
for (i = 0; i < v->size; i++) {
x = gsl_vector_get(v, i);
if (x <= 0.0) rb_raise(rb_eRuntimeError, "negative value found.\n");
gsl_vector_set(vnew, i, 20*log(x));
}
return Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, vnew);
}
static VALUE rb_gsl_vector_sin(VALUE obj)
{
return rb_gsl_sf_eval1(sin, obj);
}
static VALUE rb_gsl_vector_cos(VALUE obj)
{
return rb_gsl_sf_eval1(cos, obj);
}
static VALUE rb_gsl_vector_tan(VALUE obj)
{
return rb_gsl_sf_eval1(tan, obj);
}
static VALUE rb_gsl_vector_exp(VALUE obj)
{
return rb_gsl_sf_eval1(exp, obj);
}
static VALUE rb_gsl_vector_log(VALUE obj)
{
return rb_gsl_sf_eval1(log, obj);
}
static VALUE rb_gsl_vector_log10(VALUE obj)
{
return rb_gsl_sf_eval1(log10, obj);
}
static VALUE rb_gsl_vector_rotate_bang(int argc, VALUE *argv, VALUE klass)
{
double rad;
double x, y, c, s;
gsl_vector *vx, *vy;
VALUE v0, v1, retval;
size_t i, n;
switch (argc) {
case 2:
if (TYPE(argv[0]) == T_ARRAY) {
v0 = rb_ary_entry(argv[0], 0);
v1 = rb_ary_entry(argv[0], 1);
if (VECTOR_P(v0) && VECTOR_P(v1)) {
Data_Get_Struct(v0, gsl_vector, vx);
Data_Get_Struct(v1, gsl_vector, vy);
n = (size_t) GSL_MIN(vx->size, vy->size);
rad = NUM2DBL(argv[1]);
retval = argv[0];
} else {
x = NUM2DBL(rb_ary_entry(argv[0], 0));
y = NUM2DBL(rb_ary_entry(argv[0], 1));
rad = NUM2DBL(argv[1]);
c = cos(rad); s = sin(rad);
return rb_ary_new3(2, rb_float_new(c*x - s*y), rb_float_new(s*x + c*y));
}
} else {
rb_raise(rb_eTypeError, "wrong argument type %s (Array expected)",
rb_class2name(CLASS_OF(argv[0])));
}
break;
case 3:
if (VECTOR_P(argv[0]) && VECTOR_P(argv[1])) {
Data_Get_Struct(argv[0], gsl_vector, vx);
Data_Get_Struct(argv[1], gsl_vector, vy);
n = (size_t) GSL_MIN(vx->size, vy->size);
rad = NUM2DBL(argv[1]);
retval = rb_ary_new3(2, argv[0], argv[1]);
} else {
x = NUM2DBL(argv[0]);
y = NUM2DBL(argv[1]);
rad = NUM2DBL(argv[2]);
c = cos(rad); s = sin(rad);
return rb_ary_new3(2, rb_float_new(c*x - s*y), rb_float_new(s*x + c*y));
}
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)", argc);
break;
}
c = cos(rad); s = sin(rad);
for (i = 0; i < n; i++) {
x = gsl_vector_get(vx, i);
y = gsl_vector_get(vy, i);
gsl_vector_set(vx, i, c*x - s*y);
gsl_vector_set(vy, i, s*x + c*y);
}
return retval;
}
static VALUE rb_gsl_vector_rotate(int argc, VALUE *argv, VALUE klass)
{
double rad;
double x, y, c, s;
gsl_vector *vx, *vy, *vxnew, *vynew;
VALUE v0, v1;
size_t i, n;
switch (argc) {
case 2:
if (TYPE(argv[0]) == T_ARRAY) {
v0 = rb_ary_entry(argv[0], 0);
v1 = rb_ary_entry(argv[0], 1);
if (VECTOR_P(v0) && VECTOR_P(v1)) {
Data_Get_Struct(v0, gsl_vector, vx);
Data_Get_Struct(v1, gsl_vector, vy);
rad = NUM2DBL(argv[1]);
} else {
x = NUM2DBL(rb_ary_entry(argv[0], 0));
y = NUM2DBL(rb_ary_entry(argv[0], 1));
rad = NUM2DBL(argv[1]);
c = cos(rad); s = sin(rad);
return rb_ary_new3(2, rb_float_new(c*x - s*y), rb_float_new(s*x + c*y));
}
} else {
rb_raise(rb_eTypeError, "wrong argument type %s (Array expected)",
rb_class2name(CLASS_OF(argv[0])));
}
break;
case 3:
if (VECTOR_P(argv[0]) && VECTOR_P(argv[1])) {
Data_Get_Struct(argv[0], gsl_vector, vx);
Data_Get_Struct(argv[1], gsl_vector, vy);
rad = NUM2DBL(argv[1]);
} else {
x = NUM2DBL(argv[0]);
y = NUM2DBL(argv[1]);
rad = NUM2DBL(argv[2]);
c = cos(rad); s = sin(rad);
return rb_ary_new3(2, rb_float_new(c*x - s*y), rb_float_new(s*x + c*y));
}
break;
default:
rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)", argc);
break;
}
n = (size_t) GSL_MIN(vx->size, vy->size);
vxnew = gsl_vector_alloc(n);
vynew = gsl_vector_alloc(n);
c = cos(rad); s = sin(rad);
for (i = 0; i < n; i++) {
x = gsl_vector_get(vx, i);
y = gsl_vector_get(vy, i);
gsl_vector_set(vxnew, i, c*x - s*y);
gsl_vector_set(vynew, i, s*x + c*y);
}
return rb_ary_new3(2, Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, vxnew),
Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, vynew));
}
#include "gsl/gsl_fit.h"
static VALUE rb_gsl_vector_linearfit(int argc, VALUE *argv, VALUE klass)
{
gsl_vector *x, *y, *w = NULL;
double c0, c1, c00, c01, c11, sumsq;
switch (argc) {
case 3:
CHECK_VECTOR(argv[0]); CHECK_VECTOR(argv[1]); CHECK_VECTOR(argv[2]);
Data_Get_Struct(argv[0], gsl_vector, x);
Data_Get_Struct(argv[1], gsl_vector, w);
Data_Get_Struct(argv[2], gsl_vector, y);
gsl_fit_wlinear(x->data, x->stride, w->data, w->stride,
y->data, y->stride, y->size, &c0, &c1, &c00, &c01, &c11,
&sumsq);
break;
case 2:
CHECK_VECTOR(argv[0]); CHECK_VECTOR(argv[1]);
Data_Get_Struct(argv[0], gsl_vector, x);
Data_Get_Struct(argv[1], gsl_vector, y);
gsl_fit_linear(x->data, x->stride, y->data,y->stride, y->size,
&c0, &c1, &c00, &c01, &c11, &sumsq);
break;
default:
rb_raise(rb_eArgError, "Wrong number of arguments (%d for 2 or 3).\n", argc);
}
return rb_ary_new3(6, rb_float_new(c0), rb_float_new(c1), rb_float_new(c00),
rb_float_new(c01), rb_float_new(c11), rb_float_new(sumsq));
}
static VALUE rb_gsl_vector_center(VALUE obj)
{
gsl_vector *v, *vnew;
double mean;
Data_Get_Struct(obj, gsl_vector, v);
mean = gsl_stats_mean(v->data, v->stride, v->size);
vnew = gsl_vector_alloc(v->size);
gsl_vector_memcpy(vnew, v);
gsl_vector_add_constant(vnew, -mean);
return Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, vnew);
}
static VALUE rb_gsl_vector_clip(int argc, VALUE *argv, VALUE obj)
{
gsl_vector *v, *vnew;
double hi = 1.0, lo = 0.0;
double x;
size_t i;
Data_Get_Struct(obj, gsl_vector, v);
switch (argc) {
case 0:
break;
case 1:
if (TYPE(argv[0]) == T_ARRAY) {
lo = NUM2DBL(rb_ary_entry(argv[0], 0));
hi = NUM2DBL(rb_ary_entry(argv[0], 1));
} else {
hi = NUM2DBL(argv[0]);
}
break;
case 2:
lo = NUM2DBL(argv[0]);
hi = NUM2DBL(argv[1]);
break;
default:
rb_raise(rb_eArgError, "Wrong number of arguments (%d for 0-2).\n", argc);
}
vnew = gsl_vector_alloc(v->size);
for (i = 0; i < v->size; i++) {
x = gsl_vector_get(v, i);
if (x > hi) x = hi;
else if (x < lo) x = lo;
else;
gsl_vector_set(vnew, i, x);
}
return Data_Wrap_Struct(cgsl_vector, 0, gsl_vector_free, vnew);
}
void Init_gsl_vector(VALUE module)
{
rb_define_singleton_method(cgsl_vector, "linspace", rb_gsl_vector_linspace, -1);
rb_define_module_function(module, "linspace", rb_gsl_vector_linspace, -1);
rb_define_singleton_method(cgsl_vector, "logspace", rb_gsl_vector_logspace, -1);
rb_define_module_function(module, "logspace", rb_gsl_vector_logspace, -1);
rb_define_singleton_method(cgsl_vector, "logspace2", rb_gsl_vector_logspace2, -1);
rb_define_module_function(module, "logspace2", rb_gsl_vector_logspace2, -1);
rb_define_method(cgsl_vector, "add", rb_gsl_vector_add, 1);
rb_define_alias(cgsl_vector, "+", "add");
rb_define_method(cgsl_vector, "sub", rb_gsl_vector_sub, 1);
rb_define_alias(cgsl_vector, "-", "sub");
rb_define_method(cgsl_vector, "mul", rb_gsl_vector_mul, 1);
rb_define_alias(cgsl_vector, "*", "mul");
rb_define_method(cgsl_vector, "div", rb_gsl_vector_div, 1);
rb_define_alias(cgsl_vector, "/", "div");
rb_define_method(cgsl_vector, "to_complex", rb_gsl_vector_to_complex, 0);
rb_define_method(cgsl_vector, "to_complex2", rb_gsl_vector_to_complex2, 0);
/*****/
rb_define_method(cgsl_vector, "coerce", rb_gsl_vector_coerce, 1);
/*****/
rb_define_method(rb_cArray, "to_gv", rb_ary_to_gv0, 0);
rb_define_alias(rb_cArray, "to_gslv", "to_gv");
rb_define_alias(rb_cArray, "to_gsl_vector", "to_gv");
rb_define_method(rb_cRange, "to_gv", rb_gsl_range_to_gv, 0);
rb_define_alias(rb_cRange, "to_gslv", "to_gv");
rb_define_alias(rb_cRange, "to_gsl_vector", "to_gv");
rb_define_singleton_method(cgsl_vector, "ary_to_gv", rb_ary_to_gv, 1);
/*****/
rb_define_method(cgsl_vector, "to_i", rb_gsl_vector_to_i, 0);
rb_define_method(cgsl_vector, "to_f", rb_gsl_vector_to_f, 0);
rb_define_singleton_method(cgsl_vector, "graph", rb_gsl_vector_graph2, -1);
rb_define_module_function(module, "graph", rb_gsl_vector_graph2, -1);
rb_define_singleton_method(cgsl_vector, "plot", rb_gsl_vector_plot2, -1);
/*****/
rb_define_method(cgsl_vector, "sqrt", rb_gsl_vector_sqrt, 0);
rb_define_method(cgsl_vector, "normalize", rb_gsl_vector_normalize, -1);
rb_define_method(cgsl_vector, "normalize!", rb_gsl_vector_normalize_bang, -1);
#ifdef HAVE_NARRAY_H
rb_define_singleton_method(cgsl_vector, "filescan_na", rb_gsl_vector_filescan_na, 1);
rb_define_singleton_method(cNArray, "filescan", rb_gsl_vector_filescan_na, 1);
#endif
rb_define_method(cgsl_vector, "decimate", rb_gsl_vector_decimate, 1);
rb_define_method(cgsl_vector, "floor", rb_gsl_vector_floor, 0);
rb_define_method(cgsl_vector, "ceil", rb_gsl_vector_ceil, 0);
#ifdef HAVE_ROUND
rb_define_method(cgsl_vector, "round", rb_gsl_vector_round, 0);
#endif
rb_define_method(cgsl_vector, "dB", rb_gsl_vector_dB, 0);
rb_define_method(cgsl_vector, "sin", rb_gsl_vector_sin, 0);
rb_define_method(cgsl_vector, "cos", rb_gsl_vector_cos, 0);
rb_define_method(cgsl_vector, "tan", rb_gsl_vector_tan, 0);
rb_define_method(cgsl_vector, "exp", rb_gsl_vector_exp, 0);
rb_define_method(cgsl_vector, "log", rb_gsl_vector_log, 0);
rb_define_method(cgsl_vector, "log10", rb_gsl_vector_log10, 0);
rb_define_singleton_method(cgsl_vector, "rotate", rb_gsl_vector_rotate, -1);
rb_define_singleton_method(cgsl_vector, "rotate!", rb_gsl_vector_rotate_bang, -1);
rb_define_singleton_method(cgsl_vector, "linearfit", rb_gsl_vector_linearfit, -1);
rb_define_method(cgsl_vector, "center", rb_gsl_vector_center, 0);
rb_define_method(cgsl_vector, "clip", rb_gsl_vector_clip, -1);
Init_gsl_vector_init(module);
}
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