在matlab中打印n*m矩陣。

[英]print n*m matrix in matlab

In MATLAB I'm printing a very large matrix this way:

``````fid = fopen('c:\\OUTPUT.txt','wt');
fprintf(fid,'%f\t',T');
fclose(fid);
``````

But this is not right! I want to print it like this:(`\t` between them and `\n` at the end of row)

``````1   2   3
4   5   6
7   8   9
10  11  12
``````

I searched and found If it was 3*3 this was fine:

``````fprintf(fid,'%f %f %f\n',T');
``````

But I in my case size change...

2 个解决方案

#1

14

You can use the very simple

``````fprintf([repmat('%f\t', 1, size(A, 2)) '\n'], A');
``````

You will have one superfluous tab `\t` at the end of each line, though:

``````>> A = magic(5)

A =

17    24     1     8    15
23     5     7    14    16
4     6    13    20    22
10    12    19    21     3
11    18    25     2     9

>> fprintf([repmat('%f\t', 1, size(A, 2)) '\n'], A')
17.000000   24.000000   1.000000    8.000000    15.000000   % oh, a tab
23.000000   5.000000    7.000000    14.000000   16.000000   % oh, a tab
4.000000    6.000000    13.000000   20.000000   22.000000   % oh, a tab
10.000000   12.000000   19.000000   21.000000   3.000000    % oh, a tab
11.000000   18.000000   25.000000   2.000000    9.000000    % oh, a tab
``````

To print the output to a file, just use

``````fprintf(fid, [repmat('%f\t', 1, size(A, 2)) '\n'], A')
``````

#2

2

You may also want to look at `dlmwrite`

You can set delimiters, precision, etc.

``````dlmwrite('myfile.txt', M, 'delimiter', '\t', 'precision', 6)
``````

Where `M` is your matrix.

M是矩陣。