Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.graphics.apps.gnuplot > #4053

Re: dgrid3d and logscale xy with gridded data

Show all headers | View raw

Am 08.11.2018 um 09:22 schrieb rowlesmr@gmail.com:
> Hi all
> 
> I have some grid data which I would like to plot as a surface. I want the xy axes to be logscale. 
> 
> I would like to interpolate the data onto a finer grid so that I can have nice contours and that the colour gradient looks nicer.
> 
> As far as I can tell, it looks like dgrid3d does the gridding in linear space, and then logscale does the axis conversion.
> 
> How can I grid the data in log space?
> 

I would say don't logscale the axes, but plot the logarithmised (is that
an adjective?) data:

	reset
	set dgrid3d splines 60,60
	splot "dat.txt" using (log10($1)):(log10($2)):3 w l

If you want your regular (nonlog) axis ticlabels back, you can manually
relabel them, or perhaps someone else can help with getting the linked

	set link x2 via 10**x inverse log10(x)
	set link y2 via 10**y inverse log10(y)

x2 and y2 axes to show. Not sure how/if that works.

  Karl

Back to comp.graphics.apps.gnuplot | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

dgrid3d and logscale xy with gridded data rowlesmr@gmail.com - 2018-11-08 00:22 -0800
  Re: dgrid3d and logscale xy with gridded data Karl Ratzsch <mail.kfr@gmx.net> - 2018-11-08 11:17 +0100
    Re: dgrid3d and logscale xy with gridded data rowlesmr@gmail.com - 2018-11-08 18:43 -0800

csiph-web