Convert array of numbers to an array of padded strings

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dormant
dormant 2023-9-27
回答： Fangjun Jiang 2023-9-27
I have an array of numbers to convert to an array of strings.
>> stanums = 7:12;
>> stastrings = string( stanums );
stanums =
7 8 9 10 11 12
stastrings =
"7" "8" "9" "10" "11" "12"
How can I have the strings zero-padded? ie "07" "08" etc.
I tried with num2str, but can only manage that using a loop, and I would really like a more elegant way as my code has far too many loops in it already.

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回答（2 个）

Star Strider
Star Strider 2023-9-27
Ran in:
Use the compose function —
stanums = 7:12;
stastrings = compose("%02d", stanums)
stastrings = 1×6 string array
"07" "08" "09" "10" "11" "12"
Note the format descriptor string.
.
Fangjun Jiang
Fangjun Jiang 2023-9-27
Ran in:
stanums = 7:12;
s=sprintf('%02d\n',stanums(:))
s =
'07 08 09 10 11 12 '

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