contour_plot and implicit_plot terrible resolution and cutting graph



Hello Mario

> You can try the draw version for implicit functions; it seems to work
> better for this example. Relevant options are 'ip_grid' and 'ip_grid_in':
>
> load(draw) $
>
> draw2d(
> ? ip_grid = [80,80],
> ? ip_grid_in = [10,10],
> ? implicit(ygs(x,8,d,0) = 100, d,-20,20,x,0,200)) $

This worked better. Thank you. I've also solved other  similar
problems with contour_plot (instead of implicit_plot) with the option
[grid,200,200]. This basically improves resolution dramatically.