separating columns in data files
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Hello!
I have a data file, attached. I would like to only obtain the positive values of this file, i.e. only the first column and then make a subsequent text file.
This file is the output of fft on a data file, thus it contains both real values and imaginary values.
Thank you!
Karla
回答（1 个）
Walter Roberson
2024-2-6
0 个投票
You only have one column of data -- those are complex numbers.
"Only positive" would restrict to just the very first point. Every other point is complex-valued with non-zero imaginary part, and so could not be said to be positive.
1 个评论
Y = readmatrix('Y.txt');
Ypositive = Y(real(Y)>0);
writematrix(Ypositive, 'Ypositive.txt');
dbtype Ypositive.txt 1:10
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2024-2-6
2024-2-6
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