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

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

Answer 1

[Image Analyst]

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.

[maha]

Really appreciated

Answer 2

[Torsten]

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

[maha]

Thanks so much