To operate a function in all rows of matrix

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Rafael Zanetti
Rafael Zanetti 2019-2-8
评论： Rafael Zanetti 2019-2-8
How I can repeat a function irrespective a size of matrix? For example, I have a matrix A and I want calculate the difference between maximum and minimum values in all rows, without I have determine the number of rows in my function, because I have began to set the function, but I just get the function works writtening a number of each row. Thank you!
A =
66 94 75 18
4 68 40 71
85 76 66 4

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Adam Danz
Adam Danz 2019-2-8
编辑：Adam Danz 2019-2-8
The range() function computes the difference between max and min values. When the input is a matrix, it acts on the columns. To act on the rows, just transpose the matrx. I added a second transpose so the results are in a column.
maxMinDiff = range(A')'
maxMinDiff =
76
67
81
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Adam Danz
Adam Danz 2019-2-8
Oh yeah, that's better.
maxMinDiff = range(A, 2)
maxMinDiff =
76
67
81
%or
maxMinDiff = max(A,[],2) - min(A,[],2)
maxMinDiff =
76
67
81
Rafael Zanetti
Rafael Zanetti 2019-2-8
I thank you, work it, I was breaking the head researching and I was not achieving, one more time, I am grateful.

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