function1d
Arguments:
- 0<=smoothness<=1,x0>=0,y0,x1>=0,y1,...,xn>=0,yn
Description:
Insert continuous 1D function from specified list of keypoints (xk,yk)
in range [0,max(xk)] (xk are positive integers).
Default values:
smoothness=1 and x0=y0=0.
Example of use:
$ gmic function1d 1,0,0,10,30,40,20,70,30,80,0 +display_graph 400,300

Command: function1d 1,0,0,10,30,40,20,70,30,80,0 +display_graph 400,300

Command: function1d 1,0,0,10,30,40,20,70,30,80,0 +display_graph 400,300