void xfgrid(lnstyle, nxdiv)

GRIDOPTS.C

Level 1

 

char lnstyle	= 0 for no x axis subdivisions.   = -1 for tick marks only.   = 1–9 selects the line style used by dashf().
int nxdiv	The number of desired ticks between main grid lines on the x axis. For example, nxdiv = 9 will create 10 subdivisions.

 

xfgrid() is like fgrid() except that grid lines are only drawn parallel to the y axis, intersecting the x axis. yfgrid() draws lines in the other direction.