Find number of files in multiple subfolders with specific extension

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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?

Answers (1)

Image Analyst
Image Analyst on 11 Nov 2016
dir() can now look inside subfolders if you use two asterisks . See the help.
  2 Comments
Image Analyst
Image Analyst on 11 Nov 2016
You didn't use it correctly. Check the help again. See my attached demo for how to use it.

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