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Contour lines for scatter plots??

PostPosted: Thu Jun 11, 2020 9:49 am
by marksdoran
I know you can set up grid lines on scatter plots but those are rectilinear. For something like a G/G plot it would be more useful to have contour lines (like on an Ordnance Survey relief map [atlas type map]) centered on 0,0 that would show constant radius "grid" from the 0,0 centroid. Think: make a plot like a the G/G ball widget from the video overlay. You could generalize this so that properties would allow the center could be offset and contour intervals could be varied; both with fairly simple value entry boxes in the dialog.

The reason this comes up is that it's actually pretty imprecise to set up a scatter plot so the x/y scale ratios are "square" so that the plot doesn't look artificially oblong which in turn makes it more visually tricky to see, in the case of the G/G plot for instance, when you are riding the edge of the circle (ahem, oval?? egg??).

Is this possible already and I missed it or is it something that could be added?? I know someone else asked for JPG backdrops for scatter plots...I guess that might be useful for this aside from the fact that getting the axis aspect ratios would still be a bit by-eye.

Re: Contour lines for scatter plots??

PostPosted: Thu Jun 11, 2020 10:16 am
by adrian
I'll add it to our feature tracking system.

Re: Contour lines for scatter plots??

PostPosted: Wed Oct 27, 2021 5:13 am
by kristap
Sorry to kick a dead thread .... wondering if this might be in the works or not. :)

Re: Contour lines for scatter plots??

PostPosted: Wed Oct 27, 2021 10:55 am
by adrian
This is still in the system as a feature request (ie it hasn't been rejected) but it also hasn't been implemented.

I'll flag it again, but at this stage I don't know when or if it will be implemented.

Re: Contour lines for scatter plots??

PostPosted: Mon Nov 08, 2021 10:18 am
by Polecat
I too would like to request to request this feature. Potential opportunities for improvement really stand out when reference circles are shown on G-G diagrams.