take cells outside arrays to form new matrix

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Kuang-Yu WANG
Kuang-Yu WANG 2018-6-26
评论： Kuang-Yu WANG 2018-6-26
myarrays ={26*7 double} {43*7 double} .....{32*7 double} i could not get the (1,4) cell of each matrix to calculate the mean. the command i type is >>mean(myarrays{:}(1,4)), but the result have 63 output. how can i get one output of the mean from the (1,4) of all my matrix?

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OCDER
OCDER 2018-6-26
mean(cellfun(@(x) x(1,4), myarrays))
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Kuang-Yu WANG
Kuang-Yu WANG 2018-6-26
i still have a question. if i need to get the mean of (40,4) however the cell does not exist in every matrix. i tried the scrip u send but matlab just saying "Index exceeds matrix dimensions."

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