cropping/clipping a part of an axis after setting an origin

[Atanu Bandyopadhyay]

Hi ,
i am new to mathgl.
currently i am drawing a graph using Axis() and Grid(). and i am settting a transformation formula for x-coordinate ( gr->SetFunc("lg(x)",""); )

also i am setting range like (gr->SetRanges(10,20000,85,125);))

i am setting range like above just to support log calculations based on transformation formula .

But my x-axis values starts from 20..

i want to know how do i crop/clip/remove the remaining part in x-axis after setting the origin from (gr.SetOrigin(20,0);)

any small code snippet will be of great help...!!!!