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Editor to share with you how to draw component spectra and maps and independent component ERPs in eeglab, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

1. Draw component spectra and maps

In this section, you can learn which independent components contribute most to a particular band, as follows:

After clicking, the following appears:

The red box indicates the percentage of data that needs to be randomly selected. If the percentage is small, it will save time

The higher the percentage, the more accurate the result, but the more time it takes. Choose 100 here. Click Ok for the rest of the options by default.

After clicking OK, the following interface appears:

In order to estimate the contribution of individual components to a particular channel, a more accurate method is introduced here, as follows.

Suppose you need to check channel 27. Enter 27 in red box 1 below and click uncheck in red box 2 below. The interface is as follows:

After clicking OK, the following interface appears:

two。 Draw independent component ERPs

To complete this operation, you must ensure that the loaded data and electrode position data are loaded. At the same time, the epoch of the data is extracted and the data is processed by ICA, as follows:

Load data files: eeglab tutorial series (1)-load and display data

Load location file: eeglab tutorial series (2)-draw a scalp map

Extract data epoch:eeglab tutorial Series (5)-extract data epoch

4. Use ICA to decompose data

The first step: Plot > Component ERPs > In rectangular array

After the operation, the following interface appears:

Click OK to pop up the following interface:

Double-click any of the small graphics in the above interface, the corresponding sub-window will pop up, and the relevant graphics will be drawn in the sub-window.

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