Matlab: mean and stddev in a cell -


in single array it's pretty simple mean or standard deviation (std) of numbers, in cell, data doesn't have same size in each of positions couldn't mean2 or std2.

i know it's possible if copy of data in single row or single column wanted ask if knows if there single formula it?

thanks

you can use cellfun compute per-cell mean , std:

cell_mean = cellfun(@mean, my_cell); cell_std = cellfun(@std, my_cell);

for example:

>> my_cell = {[1,2,3,6,8], [2,4,20]} >> cellfun(@mean, my_cell) ans =  4.0000    8.6667  >> cellfun(@std, my_cell) ans =  2.9155    9.8658

if want mean and/or std of elements in cells, can:

>> mean([my_cell{:}]) ans =  5.7500  >> std([my_cell{:}]) ans =  6.2048

and, if cell elements of different sizes, can use cell2mat assist you:

>> mean(cell2mat(cellfun(@(x) x(:)', my_cell, 'uni', 0))) ans =  5.7500  >> std(cell2mat(cellfun(@(x) x(:)', my_cell, 'uni', 0))) ans =  6.2048

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