How to convert a vector to be a string

I'm trying to convert a vector to be a string. for example

[1,2,3,4] -> "[1,2,3,4]"

so I did write this func

function [output] = make_string(arr)
            output ={};
            for i=1:length(arr)
                output{end+1} = strcat('[',num2str(arr{i}),']');
            end
        end

but unfortunately, it takes a lot of computing time and my script became really slow. So is there any other solution?

thanks a lot in advance

[Stephen23]

https://xyproblem.info

https://en.wikipedia.org/wiki/XY_problem

Answer 1

[Matt J]

string(mat2str([1,2,3,4,5]))

ans = "[1 2 3 4 5]"

Answer 2

[Ken Garrard]

You don't need a cell array for this problem and your make_string function has errors. See doc 'cell arrays'.

If you want a comma between the values in the output string you can use the sprintf function.

s = ['[' sprintf('%g, ',A(1:end-1)) sprintf('%g]',A(end))];

This is also about 40% faster than mat2str.

[Izzat Brgli]

I'm doing this because I'm using the return from this function as row's name to index in a table.

[Stephen23]

"I'm using the return from this function as row's name to index in a table."

Converting to string is most likely an inefficient approach to "index in a table". If you show what you are doing then probably someone can show you a more efficient way.

[Izzat Brgli]

what do you recommend to do? because I agree with you it's inefficient

[Stephen23]

"what do you recommend to do?"

Exactly like I wrote in my last comment, I reccomend that you give more details of what you are currently doing, so that someone can help you. If you do not give example code, we cannot guess exactly what you are doing.