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Re: partial factoring?


From: Sergei Steshenko
Subject: Re: partial factoring?
Date: Wed, 30 May 2012 14:47:18 -0700 (PDT)




----- Original Message -----
> From: vlad777 <address@hidden>
> To: address@hidden
> Cc: 
> Sent: Wednesday, May 30, 2012 9:30 PM
> Subject: partial factoring?
> 
> Hello.
> 
> If I have symbolic expression like this:
> 
> a*x+a*y+a*z+b*w
> 
> how do i transform it to:
> 
> a*(x+y+z)+b*w
> 
> I am asking because I have much bigger expression, 
> and also how do i count how many times a variable  
> is stated in expression?
> 
> Many thanks.
> 

I recommend using Maxima: http://maxima.sourceforge.net/ . I outsource symbolic 
transformations from Octave to Maxima.

If you want a GUI other than the TCL one which comes with Maxima, there is 
WxMaxima: http://andrejv.github.com/wxmaxima/ /

You can also consider Fricas: http://fricas.sourceforge.net/ .

Both Maxima and Fricas are scriptable.

Regards,
  Sergei.



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