plerrx: Draw x error bar 

DESCRIPTION:

    Draws a set of n horizontal error bars, the
    i'th error
    bar extending from xmin[i] to xmax[i] at y coordinate
    y[i].  The terminals of the error bar are of length equal to the
    minor tick length (settable using plsmin). 

SYNOPSIS:

plerrx(n, xmin, xmax, y)

ARGUMENTS:

    n (PLINT, input) :      Number of error bars to draw. 

    xmin (PLFLT *, input) :    Pointer to array with x coordinates of
    left-hand endpoint of error bars. 

    xmax (PLFLT *, input) :    Pointer to array with x coordinates of
    right-hand endpoint of error bars. 

    y (PLFLT *, input) :    Pointer to array with y coordinates of
    error bar.