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expressing x as a real number


From: kacheep
Subject: expressing x as a real number
Date: Sat, 26 Nov 2011 09:29:29 -0800 (PST)

 I want to write a code that does something if x is a real number and does
something else if its not (like if it was a letter or a symbol). 
Is there a built in function on Octave that will help?
If not, what is a function I could use in order to tell me if x is a number
or not?

Thanks!

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