add more examples to website

[jasmainak]

I think it would be useful to have more examples on the website and make it more pedagogic if we want neuro folks to adopt our code. Just a few ideas here:

• dipole fit on motor rhythm in MNE sample data
• show recovered artifacts on MNE sample data
• simulated and recovered atoms for multivariate CSC

happy to help if needed :)

[TomDLT]

I added a new example on MNE sample data, using multivariate CSC with a rank-1 constraint.

A selection of learned atoms:

• heartbeat and eyeblink artifacts
• evoked response, whose activations are synchronized with events
• non-sinusoidal waveforms

[TomDLT]

happy to help if needed :)

PR welcome :)

[TomDLT]

I added two new examples, using univariate CSC models:

• One example extracting atoms with cross-frequency coupling
• A variant of previous example, demonstrating alpha-CSC on empirical data with strong artifacts

[agramfort]

@jasmainak if you could add the dipole fits to examples it would be great

[jasmainak]

alright! I'll make a PR.

[jasmainak]

So, I looked into this. I tried running the sample data example and it took around 30 minutes to run on my box. It seems a bit of overkill to create another example which takes 30 minutes just to show them the dipole fit.

I was thinking that we could save the atoms in one example and then when building, enforce an order on how they are run using sphinx gallery configuration. This would mean that the examples are not self-contained but it will do the job of showing people how to fit dipoles on the learned atoms. Let me know if this sounds reasonable to you.

[agramfort]

I would complement the existing example with dipole fit plots. And locally use joblib memory to save me time when I update the plots

[jasmainak]

okay sounds good. See #12