Matlab printmat

Question

I am new to Matlab. Is there a way to use printmat to print 2 words heading?

Example result as followed:

 Title One        Title Two         Title Three
        11               22                  33
        22               33                  44

Here is the code i currently trying to modify:

matA = [ 11 22 33; 22 33 44];
printmat(matA, '' , '' , 'TitleOne TitleTwo TitleThree');

I can't seems to add a space in between 'Title' and 'One' where adding the space always result in the following outcome:

printmat(matA, '' , '' , 'Title One Title Two Title Three');

     Title              One               Title
        11               22                  33
        22               33                  44

Any help is appreciated.

Answer 1

According to Matlabs help, printmat will not provide what you are seeking. You can use sprintf instead.

a = [ 11 22 33; 22 33 44];
s = {'Title One' 'Title Two' 'Title Three'};
s1 = sprintf('%12s\t%12s\t%12s\t\n', s{:});
s2 = sprintf('%12d\t%12d\t%12d\n', a);

horzcat(s1,s2)

This results in

ans =

   Title One       Title Two     Title Three    
          11              22              22
          33              33              44

~edit~
If the use of printmat is preferable (e.g., because it is more flexible) you can work around by using evalc and strrep. The trick here is to replace the spaces with other symbols (e.g. question marks) in the call to printmat, store the output in a string via evalc, and then use strrep to replace the question marks by spaces. As a nice byproduct, you get the table as a string...

a = [ 11 22 33; 22 33 44];
x = evalc('printmat(matA, '''' , ''a b c'' , ''Title?One Title?Two Title?Three'')');

s = strrep(x, '?', ' ')

This results in

s =


                 Title One    Title Two  Title Three
            a     11.00000     22.00000     33.00000
            b     22.00000     33.00000     44.00000

However, the combination of printmat and evalc causes a lot of apostrophes...

Answer 2

Well, the documentation of printmat tells you that

PRINTMAT(A,NAME,RLAB,CLAB) prints the matrix A with the row labels RLAB and column labels CLAB. NAME is a string used to name the
matrix. RLAB and CLAB are string variables that contain the row
and column labels delimited by spaces.

So spaces in the title are not natively supported.

As a workaround, you can use another separator that "looks like a space", for example, the unit separator:

printmat (
    matA, '', 'one two', ...
    ['Title' char(31) 'One Title' char(31) 'Two Title' char(31) 'Three']);

output:

Test = 
           Title One    Title Two  Title Three
    one     11.00000     22.00000     33.00000
    two     22.00000     33.00000     44.00000

But as you see, this gets awkward real fast. It will also probably not look right when printed to file or some other output than the Matlab command window (terminal, for instance). You'll have to experiment a bit.

Personally I would just write my own, more general pretty-printer using cells and sprintf with specific field-widths in the format string, as suggested by H.Muster (+1).