Summing elements of an array

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Gian Carpinelli
Gian Carpinelli 2018-4-13
评论： Stephen23 2018-4-13
Hi, so for example I have P such that: P =
3×1 cell array
[1]
[2]
[3].
The matrix P can be a n x 1 cell array, where n is any positive integer, and can only hold numbers. Ive tried to sum these numbers using sum(P) but keep getting the error ' Undefined function 'sum' for input arguments of type 'cell'. '. Any ideas on how I could do this? thank-you.
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Stephen23
Stephen23 2018-4-13
@Gian Carpinelli: why are you storing numeric data in a cell array? It would be simpler to store it in a numeric array.

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回答（2 个）

KL
KL 2018-4-13
编辑：KL 2018-4-13
sum([P{:}])
But why would you store it in cell array? If they are all numeric, better use a numeric array.
M
M 2018-4-13
You can use either
sum(cell2mat(P))
or
sum([P{:}])

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