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Load EEG data in MATLAB

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Neda Deljavan
Neda Deljavan 2023-1-16
评论： Charles 2023-9-11
Hello,
I want to load my EEG data and have its description like the code below:
load ALLEEG.mat;
% % 91 channels , 2500 timpepoints , 20 subject x 4 conditions = 80 essays
load('-mat','02-2010-anest 20100210 135.003.set')
What should I do?
To make it clear
This is my data:
I have 1*14 cell matrix, in each cell I have a double matrix, how can I make it a single matrix a*b*c (like the sample I will attach its image in the second and third image)
The sample that I have and want to make my data like this and have description of my data:
Thanks in advance for your help.
Neda
  3 个评论
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Jose
Jose 2023-6-26
very interesting
Charles
Charles 2023-9-11
It looks like this is from this tutorial: https://www.mathworks.com/matlabcentral/fileexchange/74089-a-simple-tutorial-to-start-with-functional-networks
But when I try to run that first line of code I get the error "unable to find file or directory ALLEEG.mat"
Where is that file supposed to be?
Thanks.

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采纳的回答

Walter Roberson
Walter Roberson 2023-1-16
cell2mat(reshape(YourCell, 1, 1,[]))
Or...
cat(3, YourCell{:})
  5 个评论
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Walter Roberson
Walter Roberson 2023-1-18
No, if you pad with 0 then nothing will be lost. However, in the output matrix you might not be able to tell where any particular signal ends, if 0 is a valid signal value.
nument = numel(output_cell);
base_size = size(output_cell{1});
combined_output = zeros([base_size, nument], 'like', output_cell{1});
for K = 1 : nument
this_matrix = output_cell{K};
if size(this_matrix,1) < size(combined_output,1) || size(this_matrix,2) < size(combined_output,2)
this_matrix(size(this_matrix,1), size(this_matrix,2)) = 0;
end
if size(this_matrix,1) > size(combined_output,1) || size(this_matrix,2) > size(combined_output,2)
combined_output(size(this_matrix,1), size(this_matrix,2), end) = 0;
end
combined_output(:,:,K) = this_matrix;
end
This assumes that the times are the same for each signal and that the various signals were just recorded for shorter or longer times. It does not directly imply that the signals were sampled at regular intervals, but if that were the case then it would be easier to justify putting the signals beside each other.
Neda Deljavan
Neda Deljavan 2023-1-19
Thanks for your response.
But I got this error:
Unable to perform assignment because the size of the left side is 30800-by-4 and the size of the right side is 29200-by-4.
Error in Taza1 (line 28)
combined_output(:,:,K) = this_matrix;

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更多回答（1 个）

MFK
MFK 2023-1-16
for i=1:14
single_matrix(:,:,i)=output_cell{1,i};
end
  2 个评论
Neda Deljavan
Neda Deljavan 2023-1-16
编辑：Neda Deljavan 2023-1-16
Thanks for your answer.
It gives me just the first cell as a result:
i=1: single_matrix(:,:,1)=output_cell{1,1};
And the loop does not work.
I got this error:
Unable to perform assignment because the size of the left side is 30800-by-4 and the size of the right side is 29200-by-4.
MFK
MFK 2023-1-18
Then Walter's answer is more suitable for you.

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