Reading a textfile without removing leading zeros

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Abhinav 2018-2-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/381364-reading-a-textfile-without-removing-leading-zeros

评论： Star Strider 2018-2-7

采纳的回答： Star Strider

NWISMapperExport.txt

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I want to read the attached text-file which contains two columns: text and numeric. I used the code:

fileID=fopen('NWISMapperExport.txt','r');
z=textscan(fileID,'%s %f');
fclose(fileID);

The problem is that it removes leading zeros in the second column, is there is a simple way to retain zeros? I had the same problem with importdata.

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Answer 1

Star Strider 2018-2-7

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https://ww2.mathworks.cn/matlabcentral/answers/381364-reading-a-textfile-without-removing-leading-zeros#answer_303952

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If you want to retain the leading zeros, you have to read them in as strings:

filename = 'NWISMapperExport.txt';
fidi = fopen(filename, 'rt');
D = textscan(fidi, '%s%s', 'CollectOutput',1);
Look = D{:}(1:5,2)                              % Check First Five Rows, Second Column
Look =
    5×1 cell array
      {'00152020'}
      {'00500460'}
      {'00501860'}
      {'02380002'}
      {'02380003'}