Add dimension to gain mask if ndim equals 1

[kbruegge]

Fixes an error which occurs when the gain_selector.select_gains returns an unexpected dimension.
Lets call this a hotfix since I have no idea what this is doing exactly. And why.

[vuillaut]

Hi @mackaiver
I believe the expected dimension is 1.
The gain_mask is not really a mask anymore but an array telling you what channel to use for each pixel.

[vuillaut]

Hi @mackaiver
I believe the expected dimension is 1.
The gain_mask is not really a mask anymore but an array telling you what channel to use for each pixel.

Sorry I was mixing ctapipe master version and v0.6.2.
If the gain selection is behaving in an unexpected way, I'd rather have the code breaking.

[kbruegge]

I did this on ctapipe v0.6.2.
For some telescopes it worked, for others it didn't. I did not inverstigate further.

The dl1-data-handler does not work on the current ctapipe version I as far as I know. Ever since the EventSources have been refactored in ctapipe I guess.

[vuillaut]

I did this on ctapipe v0.6.2.
For some telescopes it worked, for others it didn't. I did not inverstigate further.

The dl1-data-handler does not work on the current ctapipe version I as far as I know. Ever since the EventSources have been refactored in ctapipe I guess.

Yes many changes in ctapipe are not compatible anymore (e.g. gain selection that's why I was confused at first).

Could you rather open an issue and tell me (if you know) for which cameras it fails please?

[kbruegge]

Ok. Good idea. Unfortunately I'm rather busy at the moment. Maybe @riwim has some time to spare?

[riwim]

I will definitely try. As of now, I have just been a user of the handler. It will take some time for me to become acquainted with the project and be able to draft a reasonable issue for the very case.

Edit: I'm sorry but I can't find out how to test for this problem.