[Eeglablist] DIPFIT wiki tutorial still broken?

[Delorme, Arnaud]

Dear Curtis,

I have updated the tutorial with some of your screen captures as well as new ones.
Yes, this tutorial was updated over the years and sometimes there was a small discrepancy with the screen captures as EEGLAB evolved as well.

There was one issue in your message which is that after selecting new channel coordinates in the section “Avoiding co-registration by choosing appropriate channel locations”, you need to call back the DIPFIT settings to make sure the new coordinate transformation matrix is correct. I have added warning in the tutorial.

https://sccn.ucsd.edu/wiki/A08:_DIPFIT

I am happy to give you editing rights on this wiki page so you can update some minor details that might not be accurate.

Best wishes,

Arno

> On Apr 11, 2020, at 2:07 PM, Curtis Bingham <cnbingham at gmail.com> wrote:
> 
> Arno, 
> 
> Thank you for updating the first part of the tutorial. Unfortunately, I'm still finding a large number of differences in the tutorial vs. actual. With these differences I cannot tell whether or not the dataset, processes, or software are incorrect.
> 
> 
> 
> I’m using Matlab R2019b, EEGLAB2019_1, dipfit v3.3, and the data set downloaded as per the instructions in the wiki at https://sccn.ucsd.edu/wiki/A08:_DIPFIT
> 
> 
> 
> I’ve carefully followed the instructions up to the section labeled, “Avoiding co-registration by choosing appropriate channel locations”.
> 
> 
> 
> However, the channel locations don't match up in the Edit Channel Information Info window. 
> 
> 
> 
> The tutorial image is here: https://sccn.ucsd.edu/wiki/File:Dipfit_pop_chanedit.jpg
> 
> But the actual dialog image is here: https://imgur.com/BC39Rmd
> 
> 
> 
> By default the channel displayed in the actual is OZ, not FPz like in the tutorial. 
> 
> Scrolling through the locations to reach FPz, the coordinates are very different than the tutorial image: https://imgur.com/TRfG7NI
> 
> All of the fields are very different, not the least of which is the number of channels: 32 in the tutorial and 69 in the actual dataset. 
> 
> After following the instructions to: “Press the Look up locs to look up your channel locations (by matching the channel labels) in the template channel location file.”
> 
> the Edit channel info window looks like this: https://imgur.com/kJztzve and still looks nothing like the tutorial image.
> 
> 
> 
> Continuing with the tutorial to the section titled, “Initial fitting - Scanning on a coarse-grained grid”,  the Coarse Fit (grid scan) window is different in that it shows 71 components vs. 32 in the tutorial:
> 
> Tutorial Image: https://sccn.ucsd.edu/wiki/File:Pop_dipfit_batch.png
> 
> Actual dialog image: https://imgur.com/s3u7bCg
> 
> 
> 
> The computation of the electrode projections shows a number of errors in the command window. It is unknown if this is expected behavior. 
> 
> https://imgur.com/bsXYVLH
> 
> 
> 
> The biggest and most disturbing problem shows up in plotting the dipoles.
> 
> 
> 
> Tutorial image: https://sccn.ucsd.edu/wiki/File:Dipplot_gridsearch.gif
> 
> Actual dialog image: https://imgur.com/jqZbQOa
> 
> 
> 
> I get 48 dipoles in my plot instead of 47 in the tutorial. My plot shows very different locations than the tutorial image shows.
> 
> 
> 
> Continuing further to the section labeled, “Interactive fine-grained fitting”
> 
> The Component to fit edit box shows differences:
> 
> Tutorial image: https://sccn.ucsd.edu/wiki/File:Pop_dipfit_nonlinear.gif
> 
> Actual dialog image: https://imgur.com/bfqA0XH
> 
> The residual variance is very different, and the positions, moments for dipole #1 are very different. 
> 
> 
> 
> When plotting the map, I get a dipole on my map where yours doesn’t have one: 
> 
> Tutorial image: https://sccn.ucsd.edu/wiki/File:A24comp3.gif
> 
> Actual dialog image: https://imgur.com/HDenGI6
> 
> And mine has a scale on the right where the tutorial does not.
> 
> 
> 
> Plotting the two dipoles, there are additional, significant differences.
> 
> Tutorial image: https://sccn.ucsd.edu/wiki/File:Diplot_image2.gif
> 
> Actual dialog image: https://imgur.com/V0rmFw8
> 
> 
> 
> When I try the Automated dipole fitting, I get an error:
> 
> https://imgur.com/CszQs1F
> 
> 
> 
> Can anyone tell me what is going on? Is the tutorial out of date? Can you reproduce the exact image with the tutorial instructions?
> 
> 
> 
> Thanks,
> 
> Curtis
> 
> 
> 
> 
> 
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