How do I Average across structure
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I have a 14 subject structure (ERP_data.ERP_data); for each subject there is 3D matrix: 32(electrode) x 381(data) x 32(condition); I would like to average the data across subjects with nanmean, so the final matrix will be 32x381x32; thank you for you help!
R
3 个评论
madhan ravi
2018-8-29
Would you upload the data file/files and the code you tried?
madhan ravi
2018-8-29
Where’s the data file?
Rene Sebena
2018-8-29
采纳的回答
Jacob Ward
2018-8-29
Here's a possible solution I used to solve your problem:
clear; close all;
% This part just creates dummy data similar to yours with the same structure
ERP_data(14) = struct('ERP_data',0);
for n = 1:14
ERP_data(n) = struct('ERP_data',rand(32,381,32));
end
averagedData = zeros(32,381,32); % Initializes final matrix
for n = 1:32
for m = 1:381
for o = 1:32
dataToAverage = zeros(14,1); % Initializes vector to average
for p = 1:14
dataToAverage(p) = ERP_data(p).ERP_data(n,m,o); % Grabs the data point from each subject for the position given by m,n, and o
end
averagedData(n,m,o) = nanmean(dataToAverage); % Averages those points and then assigns that value to the position given by m,n, and o in the final matrix
end
end
end
Hope that helps!
更多回答（1 个）
Image Analyst
2018-8-30
0 个投票
You can use mean() with the 'omitnan' option.
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