remove negative values from one column and the corresponding data in another coloumn

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maha
maha 2023-5-12
评论： maha 2023-5-12
Please, I have two coloumns of data (time and coresponding strains), I want to remove the negative values of the strains and their correponding time. I extracted the negative values of strain by x=>0. The negative values was removed successifully but the corresponding time were not.
how can I fix it. They should be equal vectors to draw them.
Thanks

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采纳的回答

Image Analyst
Image Analyst 2023-5-12
Try this:
rowsToDelete = data(:, 1) < 0; % Where values in column 1 are less than 0
data(rowsToDelete, :) = []; % Delete all columns for those rows by setting to null.
% Or alternatively you can do it this way
rowsToKeep = data(:, 1) >= 0; % Where values in column 1 are more than 0
data = data(rowsToKeep, :); % Keep all columns for those rows.

更多回答（1 个）

Torsten
Torsten 2023-5-12
移动：Torsten 2023-5-12
Ran in:
t = linspace(0,1);
x = -1+2*rand(size(t));
idx = x<=0;
x(idx) = [];
t(idx) = [];
size(t)
ans = 1×2
1 59
size(x)
ans = 1×2
1 59

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