maintain 0 at the start of a number

Question

Paul Murphy 2017-12-11

0
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https://ww2.mathworks.cn/matlabcentral/answers/372294-maintain-0-at-the-start-of-a-number

回答： Star Strider 2017-12-11

I have string of numbers that starts with a 0. I need to convert this to a number (str2num) but maintain the 0 at the start, as it represents a phone number.

example:

>> a = ('0123')

a =

0123

>> b = str2num(a)

b =

123

Any suggestions on how to do this so that my answer would be 0123?

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Answer 1

Star Strider 2017-12-11

0
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https://ww2.mathworks.cn/matlabcentral/answers/372294-maintain-0-at-the-start-of-a-number#answer_295689

在 MATLAB Online 中打开

Try this:

a = ('0123');
b = sprintf('%04u', uint64(str2num(a)))

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Answer 2

Paul Murphy 2017-12-11

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https://ww2.mathworks.cn/matlabcentral/answers/372294-maintain-0-at-the-start-of-a-number#answer_295688

Its a tricky one because i need to first convert the string to a number and then to uint64 as this is the format that my course grader wants the output.