plgyax: Get y axis parameters 

DESCRIPTION:

    Identical to plgxax, except that arguments are flags for y axis. See
    the description of plgxax for more detail. 

SYNOPSIS:

plgyax(digmax, digits)

ARGUMENTS:

    digmax (PLINT *, output) :      Pointer to variable with the maximum
    number of digits for the y axis.  If nonzero, the printed label
    has been switched to a floating point representation when the
    number of digits exceeds digmax. 

    digits (PLINT *, output) :      Pointer to variable with the actual
    number of digits for the numeric labels (y axis) from the last
    plot.