picking maximum difference across entries of row vectors, Part 2

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alpedhuez
alpedhuez 2018-6-6
评论： Süleyman burak Dogaroglu 2021-4-30
I would like to generalize the previous question ( https://www.mathworks.com/matlabcentral/answers/404240-picking-maximum-difference-across-entries-of-row-vectors )
Now A is a table with the first column has the date data. (not a variale)
Please advise how to proceed in this general case.
for each row, take a difference between every possible pair of two elements in the row and returns the maximum difference
In a simpler case where A is a matrix, if A= [1 3 6 7 10], then B=[9].

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回答（2 个）

Matt J
Matt J 2018-6-6
result = max(A{:,2:end},[],2)-min(A{:,2:end},[],2)
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Matt J
Matt J 2021-4-30
编辑：Matt J 2021-4-30
Well, if A is a matrix then max(A,[],2) will give the row-wise maximum of A and similarly for min(). So, if your goal is to obtain a row vector containing the differences between the row-wise max and min of a matrix A, then it would simply be,
p = ( max(A,[],2)-min(A,[],2) ).'
You don't need the indexing A(1:end,:) when A is a matrix. My original answer was intended for when A is a table.

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Aakash Deep
Aakash Deep 2018-6-6
Hello,
In order to find out the maximum difference between two elements in a row vector, you can first sort it and then take the difference between the last and the first element.
vec = sort(A);
B = vec(end)-vec(1);
Hope this helps :)
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Stephen23
Stephen23 2018-6-6
编辑：Stephen23 2018-6-6
@alpedhuez: If you post a follow-up question please put a link to the original question. It helps us to keep track of what information or answers you have already been given, and what extra clarifications or data you have given us about the question.

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