How to select rows with a particular value form one text file and write desired rows in new file?
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Marisabel Gonzalez
il 29 Nov 2018
Modificato: KALYAN ACHARJYA
il 29 Nov 2018
Let's say I have the following data
3 43.45 0.5
4 23.21 0.4
5 32.84 0.3
6 67.02 0.4
2 13.00 0.2
3 23.32 0.1
How would I only select the rows in which the 3rd column elements are less than 0.4 and write them into a new file?
Then in this new file I would only have row 3,5 and 6 in this new file.
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KALYAN ACHARJYA
il 29 Nov 2018
Modificato: KALYAN ACHARJYA
il 29 Nov 2018
k=load('test1.txt');
idx=k(:,3)<0.4;
k(idx,:)
%Next save the file as new name, hope you can do that.
%Still if you need help, comment below
ans =
5.0000 32.8400 0.3000
2.0000 13.0000 0.2000
3.0000 23.3200 0.1000
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Bob Thompson
il 29 Nov 2018
Modificato: Bob Thompson
il 29 Nov 2018
I'm assuming the file only has numeric data.
data = dlmread('yourfilename.txt');
datan = data(data(:,3)<0.4,:);
dlmwrite('yournewfilename.txt',datan,'delimiter',' ');
You can change precision, by adding 'precision' and some form of precision (similar to fprintf), to the dlmwrite command. This will allow you to have extra zeroes, or spaces or things of that nature.
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