Hello, I have a cell array with the list of files I would like to delete. However I would not like to use a for loop to loop through each file to delete it.

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Krishna Ghanakota 2024-3-8

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https://ww2.mathworks.cn/matlabcentral/answers/2091986-hello-i-have-a-cell-array-with-the-list-of-files-i-would-like-to-delete-however-i-would-not-like-t

评论： Steve Van Hooser 2024-6-18

采纳的回答： Voss

Files - A cell array of size 1x3 with file names to be deleted.

Files =

1×3 cell array

{'1.txt'} {'2.txt'} {'3.txt'}

Working Code :

for i = 1:length(Files)

delete(string(Files(i)));

end

However, I would like to write a single line of code without for loop to achieve the same.

Note: Every run of my code can have different number of files to be deleted. So hardcoding with the command

delete 1.txt 2.txt 3.txt

will not be helpful.

采纳的回答

Voss 2024-3-8

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https://ww2.mathworks.cn/matlabcentral/answers/2091986-hello-i-have-a-cell-array-with-the-list-of-files-i-would-like-to-delete-however-i-would-not-like-t#answer_1422946

编辑：Voss 2024-3-8

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Pass the file names as arguments to delete(). Since the names are already in a cell array, this is easy:

delete(Files{:})

Demonstration:

% make some .txt files:
writematrix(1,'1.txt')
writematrix(2,'2.txt')
writematrix(3,'3.txt')
% get info about the .txt files:
fn = dir('*.txt') % 3 files found
fn = 3x1 struct array with fields:
    name
    folder
    date
    bytes
    isdir
    datenum
% construct a cell array with the file names:
Files = fullfile({fn.folder},{fn.name});
% delete the files:
delete(Files{:})
% confirm that all three files have been deleted:
fn = dir('*.txt') % 0 files found
fn = 

  0x1 empty struct array with fields:

    name
    folder
    date
    bytes
    isdir
    datenum

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Stephen23 2024-6-18

编辑：Stephen23 2024-6-18

"This use of calling delete with a cell array of file names is not documented but probably should be in the documentation for delete."

This answer does not call DELETE with a cell array of filenames. In fact it calls DELETE with every filename as a separate input, exactly as documented: https://www.mathworks.com/help/matlab/ref/delete.html

This answer uses a comma-separated list generated from a cell array. A comma-separated list is a general syntactical feature of MATLAB that can be used with any function or operator:

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/discussions/tips/847976-tutorial-comma-separated-lists-and-how-to-use-them

Steve Van Hooser 2024-6-18

Yes, this is correct. Sorry for my error. DELETE does NOT take cell arrays as an input. (I just realized and was coming back to correct myself! You beat me to it.)

Thanks

Steve

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