Mean of cell array containing matrices

Hi,

I have a 1x10 cell array, each contains a matrix of nx2 (8x2, 9x2, 6x2, 7x2, 7x2...). I would like to take the mean of each column of the matrices, and re-sort the cell array accoring to the means. I tried to use mean and cee2mat and ran into dimension problems...Thank you in advance for helping!!!

Answer 1

[Peng Li]

Not sure what do you mean by "re-sort the cell array according to the means" as you have two means corresponding to each cell. Below example shows how to take the means and each column within a cell, and sort the cell based on the mean of the first column.

% generated a 1 by 10 cell, each with a n*2 random matrix.
% n generated randomly within 1 and 20
ind      = 1:10;
testCell = arrayfun(@(x) rand(randi(20), 2), ind, 'UniformOutput', 0);

% mean of each column within cell
meanInCell = cell2mat(cellfun(@mean, testCell, 'UniformOutput', 0)');

% sort by the mean of first column
[~, indSort] = sort(meanInCell(:, 1));
sortTestCell = testCell(indSort);

[alicia che]

Thank you so much!