How to convert a vector to be a string
显示 更早的评论
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
采纳的回答
string(mat2str([1,2,3,4,5]))
更多回答（1 个）
Ken Garrard
2021-3-28
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.
4 个评论
Izzat Brgli
2021-3-28
Stephen23
2021-3-28
"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
2021-3-28
编辑：Izzat Brgli
2021-3-28
Stephen23
2021-3-28
"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.
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