Using movmean to calculate mean of first and last element in array

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sr9497 2022-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/1677319-using-movmean-to-calculate-mean-of-first-and-last-element-in-array

评论： Ive J 2022-3-22

I have an array [1 5 8 10] and using movmean with window length [0 1] this gives me [3 6.5 9 10]. Is there a way in which I can use movmean to calculate the mean of 10 and 1 as well and add that in the fourth position of the array?

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Answer 1

Ive J 2022-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/1677319-using-movmean-to-calculate-mean-of-first-and-last-element-in-array#answer_923764

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What about this?

a = [1 5 8 10];
ma = movmean([a, a(1)], [0 1], 'Endpoints', 'discard')
ma = 1×4
    3.0000    6.5000    9.0000    5.5000

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sr9497 2022-3-22

编辑：sr9497 2022-3-22

Thank you! Do you know how I could change this so it also works for a matrix? Then for every column.

Ive J 2022-3-22

在 MATLAB Online 中打开

Just set dim to 2:

a = [1 5 8 10;3 4 5 12];
ma = movmean([a, a(:, 1)], [0 1], 2, 'Endpoints', 'discard')
ma = 2×4
    3.0000    6.5000    9.0000    5.5000
    3.5000    4.5000    8.5000    7.5000