Dlmwrite function problem to be fixed

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!

Answer 1

[dpb]

doc colon

dlmwrite('newfile',[C(:,1) C(:,5)]);

[Cladio Andrea]

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]

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?