Is there any 'openwithtxt' command in matlab for the files with different extentions ?

I have a file with an extention of $PJ. I can open it with txt and make some changes inside, when I use the right click and choose 'open with' segment. Can I do this in matlab to make modifications inside the original file ?

[Geoff]

Please refer to my answer to another of your questions: http://www.mathworks.com/matlabcentral/answers/39006-how-to-read-any-file-by-using-txt

You did not accept that answer or ask for clarification. Now you are asking the same question again.

A file's extension is completely irrelevant. There is no physical difference between a bunch of text in a file with the extension '.TXT' and the same bunch of text in a file with the extension '.$PJ'.

[Muharrem Askin]

Sorry Geoff. I havent been informed by e-mail cause your answer was like a commend.Hence, I havent seen your answer before. I asked for some clarifications. You can see them on my previous question.

[Walter Roberson]

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