Baseline-error "`must be a tuple of length 2 or None"

[FranziMNE (Franziska Leimeister)]

Hi

what properties does the baseline need to have?
I have a data length from -0.2 to 3 seconds, and I want -0.2 to 0 be the baseline. I get the following error:

ValueError: `baseline=[-0.2, 0]` is an invalid argument, must be a tuple of length 2 or None

Thanks for your help!

Best,
Franzi

[mscheltienne (Mathieu Scheltienne)]

From the error message, it seems that lists are not accepted. I’m a bit surprised honestly.
Could you try baseline=(-0.2, 0)?

[FranziMNE (Franziska Leimeister)]

Haha yes this did the trick!!
Thank you!!!

[richard (Richard Höchenberger)]

@mscheltienne

I’m a bit surprised honestly.

We’re actually doing a poor job supporting “duck typing” in many places in MNE. But in this specific case, I believe a simple cast to tuple should definitely be supported…