How to replace space with zero in a table?

Question

Sonima 2019-1-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/440859-how-to-replace-space-with-zero-in-a-table

回答： Peter Perkins 2019-1-23

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Hi!

I want to replace space with zero in the H4.Time without loop.

K>> head(H4)
ans =
  8×7 table
      Date       Time     Open     High      Low     Close    Volume
    ________    ______    _____    _____    _____    _____    ______
    20010102    200000     64.3    64.35    64.25    64.35     184  
    20010103         0     64.3    64.75     64.3    64.59     924  
    20010103     40000     64.6     64.7    64.39    64.52     932  
    20010103     80000    64.51    64.73    64.48    64.58     892

Any suggestion without loop to fix it?

Thanks.

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Walter Roberson 2019-1-22

在 MATLAB Online 中打开

Are the entries char or are they numeric? If they were originally numeric that got converted to fixed width then why not just 0 pad at the time?

Time = num2str([200000;0;40000;80000], '%06d')

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Answer 1

Walter Roberson 2019-1-22

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在 MATLAB Online 中打开

H4.Time(H4.Time == ' ') = '0';

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Answer 2

Peter Perkins 2019-1-23

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https://ww2.mathworks.cn/matlabcentral/answers/440859-how-to-replace-space-with-zero-in-a-table#answer_357671

Sia, you may find that using the datetime datatype for Date, and the duration data type for Time, makes your life easier. Storing numbers as text is not likely to very convenient.