How to pick maximum value in group?

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ASHA PON
ASHA PON on 19 Apr 2022
Commented: ASHA PON on 22 Apr 2022
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 Comments
Adam Danz
Adam Danz on 19 Apr 2022
Could you provide an actual example?
It sounds like you're looking for the max function.
ASHA PON
ASHA PON on 20 Apr 2022
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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Accepted Answer

Adam Danz
Adam Danz on 20 Apr 2022
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
See groupsummary for details.
  1 Comment
ASHA PON
ASHA PON on 22 Apr 2022
Thank you so much for your reply. This is what exactly i needed.

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More Answers (1)

Walter Roberson
Walter Roberson on 20 Apr 2022
findgroups(a). Then splitapply(@max)

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