How to pick maximum value in group?

Question

ASHA PON 2022-4-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1700100-how-to-pick-maximum-value-in-group

评论： ASHA PON 2022-4-22

I have created groups with repeating value in a matrix and elements in the group are matched with matrix having its probability value. Now I have to find the maximum probability value in each group.

Example:

group n =

prob 1 prob 2 prob 3 maxprob prob 5

Expected output:

group n = repeated value

maxprob

2 个评论
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Adam Danz 2022-4-19

Could you provide an actual example?

It sounds like you're looking for the max function.

ASHA PON 2022-4-20

a=[6 6 5 6 5 6 6]

b=[0.74 0.66 0.58 0.47 0.606 0.705 0.76]

group 1 = 5

0.58 0.606

group 2 = 6

0.74 0.66 0.47 0.705 0.76

Expected output

group 1 = 5

0.606

group 2 = 6

0.76

This is a smaller version of my problem. I need to apply this problem to a large number of group and n*m matrix. Thank you.

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Answer 1

Adam Danz 2022-4-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1700100-how-to-pick-maximum-value-in-group#answer_946635

在 MATLAB Online 中打开

data = [0.74  0.66  0.58  0.47  0.606  0.705  0.76];  
group = [6  6  5  6  5  6  6];
groupsummary(data(:),group(:),'max')
ans = 2×1
    0.6060
    0.7600