How to export data from matlab into a text file

Question

I have multiple arrays of data, out of which only x,y and z arrays are required to be exported as text. I know how to export a single array, but am unable to export the 3 columns of data as text file. please help, I tried with the following..

        fid = fopen('g.txt','w');
        fprintf(fid,'%f \n',x,y,z);
        fclose(fid);

bla · Accepted Answer · 2013-01-18 08:14:09Z

10

try dlmwrite, for example:

x=[1:10]';
y=2*x;
z=3*x;
dlmwrite('g.txt',[x,y,z],'delimiter', '\t');


>type 'g.txt'

1   2   3
2   4   6
3   6   9
4   8   12
5   10  15
6   12  18
7   14  21
8   16  24
9   18  27
10  20  30

edited Jan 18, 2013 at 8:14

answered Jan 18, 2013 at 7:23

bla

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4 Comments

rcty Over a year ago

Thanks for your help, but, I want to print data as separate columns

rcty Over a year ago

@nate I am able to see in proper columns in wordpad but not in notepad...can you suggest why?

bla Over a year ago

notepad unformats anything it handles, wordpad support formatted txt. Try notepad++, or just use in matlab type 'g.txt' etc...

Danil Asotsky Over a year ago

Different text editors can use different tabulation width. If you have values with variable precision (and variable width for representation) than you can have problem with proper column view. dlmwrite support additional parameter 'precision' that can help to correct width of columns.

Mikhail · Accepted Answer · 2013-01-18 08:18:55Z

3

You don't want delimiter write, you want csvwrite. It will open nicely in Excel and similar programs.

The following example creates a comma-separated value file from the matrix m.

m = [3 6 9 12 15; 5 10 15 20 25; ...
     7 14 21 28 35; 11 22 33 44 55];

csvwrite('csvlist.csv',m)
type csvlist.csv

3,6,9,12,15
5,10,15,20,25
7,14,21,28,35
11,22,33,44,55

See http://www.mathworks.com/help/matlab/ref/csvwrite.html

answered Jan 18, 2013 at 8:18

Mikhail

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