How do I save multiple PCA results in a cell array? Error: Brace indexing not supported

Question

lil brain 2022-5-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1713040-how-do-i-save-multiple-pca-results-in-a-cell-array-error-brace-indexing-not-supported

评论： Star Strider 2022-5-6

采纳的回答： Star Strider

pre_data.mat

在 MATLAB Online 中打开

Hi,

I have this raw data set which includes 18 participants. Each participants raw data (21 columns) is saved in a cell. I would like to run a principal component analysis on each cell and then collect each type of output in a new cell array.

So basically I run:

for i = 1:length(file_list);
    [coeff{i},score{i},latent{i},tsquared{i},explained{i},mu{i}] = pca(cell2mat(pre_data{i,1})); % convert each cell to a matrix and run the PCA on each cell
end

I would like to save all coeff outputs for each participant in a cell array, each score output for each participant in a cell array, and so on...

This way I would have six new cell arrays with 18 cells each in which I have the PCA outputs for each participant.

But somehow the code above gives me the error:

"Unable to perform assignment because brace indexing is not supported for variables of this type."

How would I solve this?

Thnaks!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Star Strider 2022-5-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1713040-how-do-i-save-multiple-pca-results-in-a-cell-array-error-brace-indexing-not-supported#answer_958430

在 MATLAB Online 中打开

I am not certain what the problem is.

This runs without error for me, and produces the appropriate result —

LD = load('pre_data.mat');
pre_data = LD.pre_data;
for i = 1:length(pre_data);
    [coeff{i},score{i},latent{i},tsquared{i},explained{i},mu{i}] = pca(cell2mat(pre_data{i,1})); % convert each cell to a matrix and run the PCA on each cell
end