plot_pair: coords for pairs of variables.

[pscicluna]

HI! I'm trying to understand how I can make the coords keyword of many arviz plotting routines to behave in a certain way. I hope explain the problem well enough, I'll gladly try to clarify if not.

To outline my problem, I'm inferring the contents of a correlation matrix with PyMC3. Now, because the matrix is symmetrical, I only want to use the upper (or lower, if it makes a difference) off-diagonal elements, that is to use elements [0,1], [1,2], [0,2] if it's a 3-dimensional problem.

However, plot_pair seems to interpret coords as a "slice" along a dimension, such that if I set coords to [0,1] on dimension one of the correlation matrix and [1,2] on dimension two, I will also get the plots for [1,1]. Is there any way that I can leave this one out automatically, or do I have to manually iterate over a set of axes to get this?

[keewis]

@pscicluna, this looks like a question about arviz, not xarray (xarray doesn't have a plot_pair function / method). You might get a quicker response if you ask this question on their repository.

[pscicluna]

Sorry, you're right - I was following links from one issue to another and ended up on the wrong repo. It's tangentially related since arviz is using an xarray internally, but hopefully I'll get a quicker answer from the arviz devs. My apologies!

[keewis]

no worries!