How to check if a file of certain type exists in folder?
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Hi All,
How can I check if a .pdf file exists in a folder
I know I can use the Exist command if I know the full filename, but I don't have the file name
Thanks,
EDIT: I will need the output as true or false
采纳的回答
Azzi Abdelmalek
2012-9-6
编辑：Azzi Abdelmalek
2012-9-6
any(size(dir([yourFolderName '/*.pdf' ]),1))
9 个评论
Aadil
2012-9-6
~isempty( dir ( fullfile ( your_path , '*.pdf' ) ) );
True if there is at least one pdf.
False if there is no pdf.
Aadil
2012-9-6
Jan
2012-9-6
See "help dir". It looks for the files in the current folder, when no folder has been specified. See the "fullfile" in Jose-Luis example.
It seems, like you have 10 files matching the filters "*.bollocks" in the current folder.
José-Luis
2012-9-6
That means you do have 10 files with the extension .bollocks in your working directory. I am not one to judge file names :P, but just to make sure, i tested in my machine and here is what i got.
bla = dir('*.youdontexist')
bla =
0x1 struct array with fields:
name
date
bytes
isdir
datenum
I would suggest you create an empty directory, make it your working directory and test again. If you have the same results, then we have an interesting problem.
Azzi Abdelmalek
2012-9-6
any(size(dir([yourFolderName '/*.pdf' ]),1))
Aadil
2012-9-6
Aadil
2012-9-6
更多回答（1 个）
You could try doing something like:
dir_struct = dir( fullfile(your_path,'*pdf') );
if numel(dir_struct) == 0
% then there are no files with extension "pdf"
else
% there is a "pdf" file in your directory
% dir_struct(1).name gives the file name of the first "pdf" file listed
end
3 个评论
Aadil
2012-9-6
Jan
2012-9-6
I assume you need '*.pdf' with the dot.
Devalla lakshmipathirao
2020-9-7
Using the code by @Dr. Seis, how can i check if .pdf exists i.e, not based on number of elements but rather by checking the file name .
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