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Change the sign of column of imported file in matlab.

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SAYED RAZVI
SAYED RAZVI 2021 年 1 月 1 日
回答済み: Ameer Hamza 2021 年 1 月 1 日
I have the data which is imported from notepad to matlab. it contains 2 columns and too many rows. one column of it is in negative which needs to be change its sign. Now how to change the sign of the entire column after impoteing the data in MATLAB?

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Ameer Hamza
Ameer Hamza 2021 年 1 月 1 日
Something like this
M_new = M.*[-1 1]; % change sign of 1st column
M_new = M.*[1 -1]; % change sign of 2nd column
or
M_new = M*[-1 0; 0 1]; % change sign of 1st column
M_new = M*[1 0; 0 -1]; % change sign of 2nd column

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