How to convert a numerical matrix into a matrix of formatted strings?

Hi,

I'd like to convert a numerical matrix into a matrix of formatted strings.

Example of input matrix:[1 2 3.051 4]

What I expect as output: {'1.00' '2.00' '3.05' 4.00'} specified by the string format '%.2f' for instance.

Thanks for your tips.

[EDITED, JSimon, 06-Oct-2011 14:16 UTC]: Cell string wanted => square brackets to curly braces.

Answer 1

[Walter Roberson]

cellstr(num2str(matrix(:),'%.2f')).'

Answer 2

[Grzegorz Knor]

use sprintf:

sprintf('%.2f ',[1 2 3.051 4])

Answer 3

[Benjamin]

Thank you for your answer but what I expect is not one string as make sprintf but a matrix of strings.

Finally, I found a solution myself:

V=[1;2;3.051;4];

M=[V 2*V];

Format='%.2f';

Delimiter=';';

Format=[Format Delimiter];

C=cell(size(M));

for i=1:size(M,1)

    RemainderString=sprintf(Format,M(i,:));

    j=0;

    while true

        [Token RemainderString]=strtok(RemainderString,Delimiter);

        if isempty(Token)

            break;

        end

        j=j+1;

        C{i,j}=Token;

    end

end

[Grzegorz Knor]

Shorter solution:

V=[1;2;3.051;4];

M=[V 2*V];

C = arrayfun(@(x)sprintf('%.2f',x),M,'Uniform',false)

[Jan]

Or as loop:

C = cell(size(M)); for i=1:numel(M); C{i}=sprintf('%.2f', M(i)); end

Using the linear index for M and C reduces the complexity.

Answer 4

[Benjamin]

Action closed.

Thanks a lot for all your answers!

Kind regards.