Reducing number of elements.

2021 9 27
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更新时间：2021 9 27
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I have a raw matrix (for example, size is 100 x 1).
I would like to calculate an average value in each 10 elements, then substitute this average value to new matrix.
Here, I dont want to use 'for loop' because actual raw data is very huge..
Do you have any idea to calculate the average value without for loop..
Thank you very mcuh,

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回答（1 个）

Stephen23
Stephen23 2021-9-27
Ran in:

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Ran in:
V = rand(100,1)
V = 100×1
0.8711 0.0119 0.7122 0.0248 0.6226 0.2492 0.9730 0.5473 0.0675 0.2847
Z = mean(reshape(V,10,10),1).'
Z = 10×1
0.4364 0.5550 0.3497 0.7366 0.3949 0.4595 0.4442 0.5738 0.3501 0.3926

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