hello everyone, i have a problem in labeling the matrix.

let's suppose i have 4x6 matrix, i want to assign each row as [1 2 3 4] similarly column [1 2 3 4 5 6] with some extra space with current matrix so that its not be seen as the part of matrix and at the end,matrix dimension should not change(i.e. 4x6). how can i do? can u help please? for example

 d=   11 12 13 14 15 16
      17 18 19 21 22 24
      27 28 25 2  44 45
      23 23 23 3   3  3

d is a matrix, i want to represent this as

 d=
    1  2  3  4  5  6
1  11 12 13 14 15 16
2  17 18 19 21 22 24
3  27 28 25  2 44 45
4  23 23  3  3  3  3

but the important thing is, i don't want 1:6 Z& 1:4 as a part of matrix,i.e. matrix dimension should not change i.e. 4x6,only additional part is, matrix d has labeled now.

[Jan]

"With sum extra space so that its not to be seen as part of matrix"? I do not understand the question. Can you post a small example? If so, please append this to the original question, not as comment to a comment. Thanks.

[Ilham Hardy]

perhaps it should be read: "With some extra space... "

[Hugh]

Maybe you could first assign your 20x40 matrix, let it be A = ones(20,40), and another matrix with e.g. B = zeros(30,50), and then you put A into B as B(1:20,1:40) = A; so you have one part with your 20x40 matrix A and some extra space left. Is it that what you're asking for?

[AMIT BHASKAR]

for ease of understanding i change the value of matrix from 20x40 to 4X6 with example. thanks

[Ilham Hardy]

Firstly, that's not how the flag works.

Secondly, WHY do you want to do that?

Answer 1

[Ced]

This is ugly, but should do the trick. Not sure why you want this though...

function print_my_mat(A)

nrows = size(A,1);
ncols = size(A,2);

my_cell = cell(nrows+1,ncols+1);

my_cell(1,2:end) = num2cell(1:ncols); % number your columns
my_cell(2:end,1) = num2cell(1:nrows); % number your rows
my_cell(2:end,2:end) = num2cell(A);   % write your matrix inside cell

for i = 1:nrows
   % format your numbers as desired and save as string
   temp = cellfun(@(x)num2str(x,'%i'),my_cell(i,:),'UniformOutput',0);
   % print row
   cellfun(@(x)fprintf('%4s',x),temp,'UniformOutput',0);
   % next line
   fprintf('\n')    
end

end

Answer 2

[Walter Roberson]

You would need to define a new data class of labeled matrix. You could possibly subclass from double precision so that you would not have to re-code all of the numeric operations. You would have to code a new display() method for the class.

But it is easier by far to just write a small bit of code that displays the matrix in that form when you ask it to.