Using fileparts and combining with a different file name

Question

Damith 2015-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/185038-using-fileparts-and-combining-with-a-different-file-name

评论： Damith 2015-3-25

Hi,

I need to strip the file name and extension (TRMM_1998_01_0103_newntcl.csv) to TRMM_1998_01_0103_newntcl and .csv and then combine the file name with different extension (.nc) and then write the complete file name. I think I am close to that but the last line does not give me the desired output (TRMM_1998_01_0103_newntcl.nc)

Any idea? or any help is appreciated.

cd ('C:\Users\Desktop')
input_file='TRMM_1998_01_0103_newntcl.csv';
[~, fName, ext] = fileparts(input_file);
filenc=fName.'nc';

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Answer 1

David Young 2015-3-24

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The last line should be

filenc = [fName '.nc'];

What you are doing here is concatenating two strings. Square brackets can be used to concatenate any kind of array, including strings. (Your previous syntax, with a dot, is used for structures.)

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Damith 2015-3-25

Thanks

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Answer 2

Image Analyst 2015-3-25

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https://ww2.mathworks.cn/matlabcentral/answers/185038-using-fileparts-and-combining-with-a-different-file-name#answer_172623

Another option, if you know for certain what the first extension is, is to use strrep():

input_file = strrep(input_file, '.csv', 'nc');

No need to call file parts. Or, if you do use fileparts

[folder, baseFileName, ext] = fileparts(input_file);
newBaseName = sprintf('%s.nc', baseFileName);
outputFile = fullfile(folder, newBaseName); % Prepend the folder.