eeglab中如何繪制獨立成分ERP貢獻

這篇文章主要介紹eeglab中如何繪制獨立成分ERP貢獻，文中介紹的非常詳細，具有一定的參考價值，感興趣的小伙伴們一定要看完！

要完成該操作，必須保證已加載數據和電極位置數據，同時還要對數據進行提取epoch，并對數據進行ICA處理，操作如下：

1. 加載數據文件

2. 加載位置文件

3. 提取數據epoch

4. 使用ICA分解數據

想要得到獨立成分的ERP 對數據的ERP 的貢獻，具體操作如下：

Plot > Component ERPs > with component maps

操作后彈出如下對話框：

點擊OK就可以彈出如下界面：

上圖中黑色包絡線是各個時間點的所有channel 的最大值和最小值，彩線是各個獨立成分的的ERP。如果只想要了解對200-500ms 數據ERP 貢獻最大的獨立成分。可在如下紅色框中編輯為200 500.

點擊OK即可。

同時在command line會返回如下運行結果：

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   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  500] ms: 79.42%

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

繪制Component ERP-image

具體操作：Plot > Component ERP image

完成該操作后，會彈出如下界面：

在上述界面填寫相應數據，具體操作和解釋可以查看教程9：eeglab教程系列(9)-繪制ERP圖像

點擊OK后，彈出如下窗口：

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