export matlab file to txt file with delimiter - matlab

Question

I have 2 column vectors named t and f which looks like this:
t=
1
2
3
4
5
and
f=
10
20
30
40
50
I would like to make a txt file which looks like this:
1,10
2,20
3,30
4,40
5,50
I tried the next codes but nothing worked so far:
vec_char=char(44*ones(1,length(t)))'; %vector of comma's
filename=fopen('functiondata.txt','w');
formatspec='%d %s %d\n';
data={t,vec_char,f};
[nrows,ncols]=size(data);
for row=1:nrows
fprintf(filename,formatspec,data{row,:});
end
fclose(filename);
if theres something better to do, it would be nice.

Answer 1

I highly suggest you use dlmwrite. This takes a matrix as well as the name of the file you want to write and writes it to file. The default delimiter that separates the numbers are commas, which is what you want.
Try this:
t = (1:5).'; f = (10:10:50).'; %// Your data
dlmwrite('functiondata.txt', [t f]);
Opening up functiondata.txt, we get this:
1,10
2,20
3,30
4,40
5,50
Note
If you are using Windows, the new line character will not be put in properly when dlmwrite is called. You need to specifically state this when calling dlmwrite:
dlmwrite('functiondata.txt', [t f], 'newline', 'pc');