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Editor to share with you how to draw 2D and 3D pictures in eeglab. I hope you will get something after reading this article. Let's discuss it together.

1. Draw a 2D ERP scalp maps of some columns

A series of 2mi D scalp maps will be drawn, each of which shows the voltage distribution for a specific latency.

The details are as follows: Plot > ERP map series > In 2murd, and the following dialog box pops up

In the above dialog box, enter the epoch delay of the desired ERP scalp maps. Note that in the input box, you can enter any numeric Matlab expression. For example, instead of 0 100 200 300 400 500, you can try 0100 100 300 500 instead of 0 100 200 400 500. Even other more complex expressions, such as-60003* (01420 / 120), are correctly interpreted.]

Suppose we are interested in the voltage distribution with a latency of 0 100 200 300 400 500ms. In the first line of the dialog box above, we need to type 0-1-0-1-0-1-0-1-5-0.

Click "OK" after typing, and the following interface appears:

two。 Draw some columns of 3D ERP scalp maps

Operating on the eeglab interface: Plot > ERP map series > In 3murd, a query window will pop up (below), asking you to create and save a new 3D header 3D spline file. This process must be done only once per montage (faster in eeglab v4.6 -). Click "OK" to begin.

Click "OK" and pop up the window below. There are two options: if you have already generated a spline file for this channel location structure, you can enter it here in the first edit box (first click "use an existing spline file or structure to activate the edit box". Then browse if you don't create such a file, you need to generate one.

But first, your channel location must be registered together with the 3murd header template you want to draw. Note that if you are using one of the template channel location files, such as the (v4.6 +) tutorial dataset, the Talairach transformation matrix field, which contains channel alignment information, is automatically populated. Enter the output file name (in the second edit box), draw the wait time to draw (0 ms, 100, 200, 300, 400, and 500 wait times below), and then press "wait".

If the Talairach transformation matrix is not automatically populated as follows, it needs to be populated manually.

Manual fill operation: click the Manual coreg to the right of the input box. Pop up the box below and click "OK".

After clicking OK in the above figure, the Talairach transformation matrix edit box will automatically fill in the content, and then fill in the waiting time, as shown in the following figure.

In the image above, click "OK" to pop up 3D scalp maps.

In the image above, you can click on any one of the images, and a sub-window will pop up to draw it separately.

Operations such as rotation can be performed according to the requirements in the sub-graph:

After reading this article, I believe you have some understanding of "how to draw 2D and 3D pictures in eeglab". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

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