True values in pair_plot

[andersdot]

During testing of a model, it would be nice to be able to over plot the true values in the plot_pair matrix, similar to the over plotting of the point estimates of the samples. This could be a dictionary the user feeds into a keyword argument like true_values={'var1':0.1, 'var2':5.0}

[agustinaarroyuelo]

Hello! Tank you for opening this issue. Here is an example of what you suggested:

The red dots are example true_values. I'm working on the details right now :)

[canyon289]

Thanks for the contribution @agustinaarroyuelo