Dlmwrite function problem to be fixed

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Cladio Andrea
Cladio Andrea il 26 Feb 2015
Commentato: dpb il 26 Feb 2015
Hello guys i have a matrix of C(6,5) , what i want is to just take first and the fifth column and insert it into a text file , and i want it to be something like:
0 0
1 1
3 8
4 7
8 1
do you know which steps i have to follow? Thank you!

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dpb il 26 Feb 2015
doc colon
dlmwrite('newfile',[C(:,1) C(:,5)]);
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Cladio Andrea
Cladio Andrea il 26 Feb 2015
Thank you so much for the answer! Just one problem i have, the matrix size is 3600000 and in the text file i need the size also but in text file it seems in exponential notation, and i want to get rid of this stupid exp notation, do you know how to?
dpb il 26 Feb 2015
doc dlmwrite
Look at the optional 'precision' output that lets you specify either significant digits wanted or a specific format string.
NB: however, if the file is this large, what are you doing writing it as text file anyway? Can't possible expect to look at it by hand so why not use a stream file or if keeping it in Matlab, .mat?

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