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Find number of files in multiple subfolders with specific extension

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monkey_matlab
monkey_matlab 2016-11-11
评论： Image Analyst 2016-11-11
Hello,
I have multiple sub folders in one main folder. These multiple sub folders contains files with the same extension .pgm. How do I go about finding the total number of files in all the subfolders with that specific extension?
I am trying the following:
x = '*.pgm';
AA = size(dir(x),1)
How do I then go through each subfolders?

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回答（1 个）

Image Analyst
Image Analyst 2016-11-11
dir() can now look inside subfolders if you use two asterisks . See the help.
  2 个评论
monkey_matlab
monkey_matlab 2016-11-11
I did a:
dir('**.pgm')
in the main folder, but I got the response '**.pgm' not found.
I also did a
help dir
but could not get a proper way to get the number of files in all the subfolders.

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