How do I run PCA on multiple cell arrays

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lil brain 2022-4-13

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评论： lil brain 2022-4-13

采纳的回答： Image Analyst

pre_data_1.mat

在 MATLAB Online 中打开

Hi,

I have a cell array (see attachment) where each cell contains an array with 21 columns (variables). Each cell represents a different participants and is of different length. I would like to run the PCA on each cell in the cell array and collect the outputs (coeff,score,latent,tsquared,explained,mu) for all participants.

The fucntion I want to use is the following with X being my cell array pre_data_1.

[coeff,score,latent,tsquared,explained,mu] = pca(X)

I am specifically interested in getting an "explained" that contains all the explained variables from each participant. In this variable each column should correspond to an explained variable from a cell/ participant.

I wonder if someone could help me with that?

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采纳的回答

Image Analyst 2022-4-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1695610-how-do-i-run-pca-on-multiple-cell-arrays#answer_941930

在 MATLAB Online 中打开

Did you try something like

numCells = numel(X);
for k = 1 : numCells
    % Extract contents of cell into array.
    thisX = X{k}; 
    % Do PCA and store results in more cell arrays.
    [coeff{k},score{k},latent{k},tsquared{k},explained{k},mu{k}] = pca(thisX); 
end