|void curve (x, y, npts, sym)||CURVES.C||Level 3|
|float *x||The x vector to be plotted.|
|float *y||The y vector to be plotted|
|int npts||The dimension of x and y.|
|int sym||= 0 draw curve only.
> 0 draw curve and symbols every sym points.
< 0 draw symbols only every sym points.
|Each time curve() is called, a curve is drawn on the plot in
the current color. Sixteen different symbols can be used as curve
markers, and nine different line styles
are available. The line and symbol styles can be changed automatically
by using the legend feature or manually by calling
the appropriate routine. curve() is used for any of the linear or
Scatter plots may be drawn by calling scatplot(1)
before calling curve(). You can still draw symbols every sym