how to change a filename

Question

Pritha Pande 2017-5-23

0
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https://ww2.mathworks.cn/matlabcentral/answers/341532-how-to-change-a-filename

回答： Walter Roberson 2017-5-24

What command should i give to change file names in one go; as of now i am giving

mypath='C:\Users\Pritha\Desktop\matalb\1996bc\g4.timeAvgMap.M2TMNXAER_5_12_4_BCEXTTAU.199';
names=dir(mypath);
fileNames = {names(~[names.isdir]).name};
for iFile = 1:(fileNames)  %# Loop over the file names
    newName = sprintf('%d.nc',iFile);  %# Make the new name
    f=['C:\Users\Pritha\Desktop\matalb\1996bc\g4.timeAvgMap.M2TMNXAER_5_12_4_BCEXTTAU.199',num2str(newName)];
    g=['C:\Users\Pritha\Desktop\matalb\1996bc\g4.timeAvgMap.M2TMNXAER_5_12_4_BCEXTTAU.199',num2str(fileNames{iFile})];
    movefile(g,f);        %# Rename the file
end
g4.timeAvgMap.M2TMNXAER_5_12_4_BCEXTTAU.19960101-19960130.180W_90S_180E_90N.nc
g4.timeAvgMap.M2TMNXAER_5_12_4_BCEXTTAU.19960201-19960231.180W_90S_180E_90N.nc
g4.timeAvgMap.M2TMNXAER_5_12_4_BCEXTTAU.19960301-19960331.180W_90S_180E_90N.nc
g4.timeAvgMap.M2TMNXAER_5_12_4_BCEXTTAU.19960401-19960431.180W_90S_180E_90N.nc

I want them to be name as 1.nc, 2.nc, 3.nc, 4.nc.

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Rik 2017-5-23

Have you tried googling it? I don't think I'm exaggerating if I say there are hundreds of examples to be found to do this.

One hint: if you are planning on using anything to process your data for which it is useful to keep the original order, use padding. You can do that with sprintf('%04d',n).

Pritha Pande 2017-5-24

Ya I know there are. But, I have been trying it for quite long and not able to get the desired result. I wanted to know what is wrong wih my command so, thought of asking it overhere. Anyways,I will try it again with the hint you have given.

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Answer 1

Walter Roberson 2017-5-24

3
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https://ww2.mathworks.cn/matlabcentral/answers/341532-how-to-change-a-filename#answer_268172

在 MATLAB Online 中打开

You are missing the directory separator between the folder name and the file name.

I recommend that you re-code using fullfile()

mypath = 'C:\Users\Pritha\Desktop\matalb\1996bc\g4.timeAvgMap.M2TMNXAER_5_12_4_BCEXTTAU.199';
names = dir(mypath);
names([names.isdir]) = [];
fileNames = {names.name};
for iFile = 1: length(fileNames)  %# Loop over the file names
      newName = sprintf('%04d.nc', iFile);  %# Make the new name
      f = fullfile(mypath, newName);
      g = fullfile(mypath, fileNames{iFile});
      movefile(g,f);        %# Rename the file
end