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Hello guys
I am trying to delete rows that has the same string value in collumn 1, but when I run the script nothing changes. Does anybody know what is wrong?

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Cris LaPierre
Cris LaPierre 2022-5-7

0 个投票

Modified from this example
[C,ia] = unique(grades{:, 1});
B = grades(ia,:)
See this page for alternate ways to access data in a table.

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Image Analyst
Image Analyst 2022-5-7
Ran in:

0 个投票

Ran in:
Try this. Adapt as needed
m = [1,2,3;4,5,6;4,5,6;7,8,9]
m = 4×3
1 2 3 4 5 6 4 5 6 7 8 9
diffRows = diff(m, 1)
diffRows = 3×3
3 3 3 0 0 0 3 3 3
% Delete second row if it's a duplicate and adjacent.
rowsToDelete = find(all(diffRows == 0, 2)) + 1
rowsToDelete = 3
m(rowsToDelete, :) = []
m = 3×3
1 2 3 4 5 6 7 8 9
% Alternatively delete first row if it's a duplicate and adjacent.
% rowsToDelete = find(all(diffRows == 0, 2))
% m(rowsToDelete, :) = []

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