scikit-hep/iminuit

issue with 'draw_mncontour'

Closed this issue · 2 comments

girishky commented

Hello,
In the iminuit basic_tutorial.ipynb, when I run the given example
m.draw_mncontour("α", "β", cl=(0.68, 0.9, 0.99))
it leads to following error:
ValueError: 'codes' must be a 1D list or array with the same length of 'vertices'. Your vertices have shape (101, 2) but your codes have shape (100,)

I think it has something to do with this line

iminuit/src/iminuit/minuit.py

Line 1862 in 23be056

assert len(c_val) == len(codes), f"{len(c_val)} {len(codes)}"

Intriguingly, the above issue happens on M1 Mac-mini. On my Macbook (intel), I don't face any such issue.

best regards

henryiii commented

Ahh, this is what's breaking #704 and #703 - Matplotlib 3.5 changed something. If you pin to Matplotlib 3.4, it will work. Hopefully will figure out why this is broken soon.

HDembinski commented

Thank you both for looking into this and sorry for the long wait, this will be fixed now.