finding the mean/average of the smallest values in a row

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Ach 2018-2-25

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回答： Mann Baidi 2024-5-6

hi , i have a row and i want to find the average of the smallest values and the position of this minimum.

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Answer 1

Mann Baidi 2024-5-6

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Hi @Ach,

For finding the minimum values for each row in a matrix, you can use the "min" function in MATLAB.

You can use the min function for your requirement as follows:

rng default % for reproducibility
A = rand(5,10)
A = 5x10
    0.8147    0.0975    0.1576    0.1419    0.6557    0.7577    0.7060    0.8235    0.4387    0.4898
    0.9058    0.2785    0.9706    0.4218    0.0357    0.7431    0.0318    0.6948    0.3816    0.4456
    0.1270    0.5469    0.9572    0.9157    0.8491    0.3922    0.2769    0.3171    0.7655    0.6463
    0.9134    0.9575    0.4854    0.7922    0.9340    0.6555    0.0462    0.9502    0.7952    0.7094
    0.6324    0.9649    0.8003    0.9595    0.6787    0.1712    0.0971    0.0344    0.1869    0.7547
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% use min function to get smallest element from each row.
[min_numbers,idx] = min(A,[],2) % idx refers to the postition of the minimum number in the row
min_numbers = 5x1
    0.0975
    0.0318
    0.1270
    0.0462
    0.0344
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idx = 5x1
     2
     7
     1
     7
     8
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% use mean function
result = mean(min_numbers)
result = 0.0674