Shulou(Shulou.com)06/01 Report--

This article mainly introduces how to draw independent component ERP contribution in eeglab, which is very detailed and has certain reference value. Friends who are interested must read it!

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 file

Load location file

Extract data epoch

Use ICA to decompose data

To get the contribution of the independent component ERP to the ERP of the data, do the following:

Plot > Component ERPs > with component maps

The following dialog box pops up after the operation:

Click OK and the following interface pops up:

In the image above, the black envelope is the maximum and minimum of all channel at each time point, and the color line is the ERP of each independent component. If you only want to know the independent components that contribute the most to the ERP of 200-500ms data. Can be edited as 200 500 in the red box below.

Just click OK.

At the same time, the following running result will be returned in command line:

Scaling components to RMS microvolt

Scaling components to RMS microvolt

Data epoch is from-1000 ms to 1992 ms.

Plotting data from-1000 ms to 1992 ms.

Comparing maximum projections for components:

IC1 maximum mean power of back-projection: 38.509

IC2 maximum mean power of back-projection: 0.819246

IC3 maximum mean power of back-projection: 22.6933

IC4 maximum mean power of back-projection: 6.78334

IC5 maximum mean power of back-projection: 21.5198

IC6 maximum mean power of back-projection: 5.54757

IC7 maximum mean power of back-projection: 22.5431

IC8 maximum mean power of back-projection: 3.83181

IC9 maximum mean power of back-projection: 4.76929

IC10 maximum mean power of back-projection: 2.38919

IC11 maximum mean power of back-projection: 4.37118

IC12 maximum mean power of back-projection: 3.1094

IC13 maximum mean power of back-projection: 3.61488

IC14 maximum mean power of back-projection: 10.5461

IC15 maximum mean power of back-projection: 2.24509

IC16 maximum mean power of back-projection: 1.07009

IC17 maximum mean power of back-projection: 4.95616

IC18 maximum mean power of back-projection: 2.12227

IC19 maximum mean power of back-projection: 2.65247

IC20 maximum mean power of back-projection: 1.49523

IC21 maximum mean power of back-projection: 1.63033

IC22 maximum mean power of back-projection: 0.388555

IC23 maximum mean power of back-projection: 1.9825

IC24 maximum mean power of back-projection: 0.869334

IC25 maximum mean power of back-projection: 0.653917

IC26 maximum mean power of back-projection: 0.586803

IC27 maximum mean power of back-projection: 0.639125

IC28 maximum mean power of back-projection: 1.29816

IC29 maximum mean power of back-projection: 0.762766

IC30 maximum mean power of back-projection: 0.408131

IC31 maximum mean power of back-projection: 0.268396

IC32 maximum mean power of back-projection: 0.172242

In the interval 203 ms to 500 ms.

Plotting envelopes of 7 component projections.

Topo maps will show components: 5 6 3 7 4 1 14

With max var at times (ms): 273 328 398 398 430 438

Epoch frames: 318 325 334 334 334 338 339

Component sortvar in interval: 38.51 0.82 22.69 6.78 21.52 5.55 22.54

Summed component 'ppaf' in interval [203.125] ms: 79.42%

Plot limits (sec, sec, uV, uV) [- 1Lim 1.99219 le le 16.3255 le 35.6778]

Draw Component ERP-image

Specific operations: Plot > Component ERP image

When this is done, the following interface pops up:

Fill in the relevant data in the above interface. For specific operation and explanation, you can view the tutorial 9:eeglab tutorial series (9)-draw ERP images.

After clicking OK, the following window pops up:

These are all the contents of the article "how to draw independent component ERP contributions in eeglab". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.