Ref Values from from arviz.plot_posterior

Questions v5
1

Hi

I was wondering how to get the orange values (Ref Vals) from the attached diagram from either arviz.plot_posterior Plot or from another function.

download
download515×461 18.8 KB

2

Welcome!

You can specify the reference value (the orange line) via the ref_val argument to plot_posterior(). The full documentation is here.

3

To get the values you can just grab the posterior and count how many draws fall below the value, like (idata.posterior["y"] < -2).mean(("chain", "draw"))