Queries with topoplots

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1

Hello,
I am currently working on creating topoplots with raw data.
As of now the raw is in *.csv format with 8 columns of EEG channels .

So far have been able to create evoked dataframe using pandas and
plot using evoked.plot_topomap() function for a specified duration of time.

Have a couple of questions on this .

   1. Currently able to get a maximum of 20 frames per topoplot, is it
   possible to get more than this?
   2. How do i create topoplots similar to evoked.plot_topomap() for each
   frequency band such as alpha, beta , delta, theta, gamma etc.

Any suggestions is greatly appreciated.

Regards,
Sundar.
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2

you can pass your evoked to:

https://martinos.org/mne/stable/generated/mne.time_frequency.tfr_morlet.html
or
https://martinos.org/mne/stable/generated/mne.time_
frequency.psd_welch.html#mne.time_frequency.psd_welch

see examples that use these functions for inspiration.

HTH
Alex
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3

Thanks Alex,
I did go through the option mentioned i suppose it would give a single time
frequency plot .
I was looking to plot a topo series for each frequency band separately for
a time duration.
Have attached a sample here , this is a plot for evoked potentials .
I want to create a similar one for Alpha, Beta, Delta, Theta and Gamma.

Regards,
Sundar.

you can pass your evoked to:

https://martinos.org/mne/stable/generated/mne.time_frequency
.tfr_morlet.html
or
https://martinos.org/mne/stable/generated/mne.time_frequency
.psd_welch.html#mne.time_frequency.psd_welch

see examples that use these functions for inspiration.

HTH
Alex

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4

use plot_topomap:

https://martinos.org/mne/stable/generated/mne.viz.plot_
topomap.html#mne.viz.plot_topomap

for example used here in the context of decoding

https://martinos.org/mne/stable/auto_examples/decoding/
plot_decoding_csp_space.html#sphx-glr-auto-examples-
decoding-plot-decoding-csp-space-py

HTH
Alex
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5

Hi Alex,
Thank you for the prompt reply.
I am using the same function to plot for evoked potentials data
(plot_topomap),

However want to do the same for each frequency band .
how do i create a data set with a specific frequency band from evoked
dataframe
to do these plots.

Regards,
Sundar.