How to pad zero in string using sprintf

Question

Nimas 2023-1-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1888972-how-to-pad-zero-in-string-using-sprintf

评论： Fangjun Jiang 2023-1-5

Hello, I have some string

'1010'
'111'
'010'
'10'
'10111'

How to pad zero after the string by using sprint function to be like this

'10100'
'11100'
'01000'
'10000'
'10111'

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Answer 1

Bora Eryilmaz 2023-1-5

2
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https://ww2.mathworks.cn/matlabcentral/answers/1888972-how-to-pad-zero-in-string-using-sprintf#answer_1142012

在 MATLAB Online 中打开

This should work on both char arrays as well as strings:

a = {  '1010'
        '111'
        '010'
         '10'
      '10111'}
a = 5×1 cell array
    {'1010' }
    {'111'  }
    {'010'  }
    {'10'   }
    {'10111'}
b = pad(a, '0')
b = 5×1 cell array
    {'10100'}
    {'11100'}
    {'01000'}
    {'10000'}
    {'10111'}

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Stephen23 2023-1-5

See also: https://www.mathworks.com/help/matlab/ref/pad.html

Fangjun Jiang 2023-1-5

good to know

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Answer 2

Fangjun Jiang 2023-1-5

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https://ww2.mathworks.cn/matlabcentral/answers/1888972-how-to-pad-zero-in-string-using-sprintf#answer_1141992

在 MATLAB Online 中打开

a={'1010'
    '111'
    '010'
    '10'
    '10111'};
b=char(a)
b = 5×5 char array
    '1010 '
    '111  '
    '010  '
    '10   '
    '10111'
b(b==' ')='0'
b = 5×5 char array
    '10100'
    '11100'
    '01000'
    '10000'
    '10111'

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Answer 3

the cyclist 2023-1-5

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https://ww2.mathworks.cn/matlabcentral/answers/1888972-how-to-pad-zero-in-string-using-sprintf#answer_1142002

在 MATLAB Online 中打开

@Fangjun Jiang gave a great answer for character arrays (which is what you show that you have).

This is a case where MATLAB's new-ish (R2016) string data type might suit your need better, if you can go upstream in your code to use that type.

string = ["1010";
          "111";
          "010";
          "10";
          "10111"];
pad(string,"0")
ans = 5×1 string array
    "10100"
    "11100"
    "01000"
    "10000"
    "10111"