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How to calculate the mean value of the non vero value in a vector?

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M
M 2022-9-3
编辑： James Tursa 2022-9-3
How to calculate the mean value of the non vero value in a vector?
For example there is a vector contains 3 values M = [0.7,0.3,0]
the mean value in this case should be 0.5

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采纳的回答

Star Strider
Star Strider 2022-9-3
Ran in:
M = [0.7,0.3,0];
Mmean = mean(M(M~=0))
Mmean = 0.5000

更多回答（1 个）

James Tursa
James Tursa 2022-9-3
编辑：James Tursa 2022-9-3
Ran in:
Another way that doesn't require any data copying:
M = [0.7,0.3,0];
sum(M)/nnz(M)
ans = 0.5000
Be aware that if there are no non-zero elements, this will return NaN (same as Star's method).

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