How can I use a variable for formatting?

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Rosario Frontino
Rosario Frontino 2022-4-14
评论： Rosario Frontino 2022-4-14
Hi.
I have this line of code:
address = num2str(str2double(string(dec2bin(find(strcmp(dictionary,content(1:end-1)))))),'%04d');
It works, but I would like that the 4 is taken from a variable.
In particular, my variable is
numBits = ceil(log2(length(phrases)));
Is there a way to do so? Thanks

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Les Beckham
Les Beckham 2022-4-14
编辑：Les Beckham 2022-4-14
Ran in:
You can also use %*d, like this
for k = 1:5
fprintf('%*d\n', k, 2*k); % the first argument (k) is the field width, 2*k is the value to print
end
2 4 6 8 10
Documentation is here
By the way, why are you converting to string and then to double and then back to a string?
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Les Beckham
Les Beckham 2022-4-14
编辑：Les Beckham 2022-4-14
You are welcome. @Star Strider is correct, sprintf is the right way to go.
If an answer in the forum solves your problem, it is considered gracious to accept it. If not please add a comment to request additional clarification. Thanks.
Rosario Frontino
Rosario Frontino 2022-4-14
Yeah it works by using sprintf. Thanks you both

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