How to convert each row of the matrix into a Character array, without using a for command?
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Matlab code:
A=rand(1e3,2);%just an example
for i=1:size(A,1)
B{i}=num2str(A(i,:));
end
Question: The cost time of the code is related to the size of A. How can I get the B without the For command and spend as less time as possible?
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dpb
2019-4-3
Preallocate B may help just tad...
Alternatives to loop include
B=cellstr(num2str(A));
but what is end purpose for doing the conversion? Perhaps could avoid entirely??? The most time-saving optimization is the one that avoids doing the unneeded... :)
3 个评论
dpb
2019-4-3
Show a small subset example with data set...I suspect you can use ismember or other logical addressing to solve the problem directly without the text step at all...but need an example to ensure we're on the same page.
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