How do I extract only file name from full file name?

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Dong-Gyu Jang
Dong-Gyu Jang 2016-3-15
编辑： Dong-Gyu Jang 2016-3-15
Hello.
Let's say there is a string "5500ps1.png"
I would like to extract name until comma so outcome from this extraction would be "5500ps1"
How can I do this?
As there are many files, I need to write down code automatically doing this job.
Thanks!

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Dong-Gyu Jang
Dong-Gyu Jang 2016-3-15
编辑：Dong-Gyu Jang 2016-3-15
Oh..I immediately get the answer:)
The function, fileparts, can be used for this process:)
file = 'H:\user4\matlab\myfile.txt';
[pathstr,name,ext] = fileparts(file)
Then the result is
pathstr =
H:\user4\matlab
name =
myfile
ext =
.txt

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