MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Eliminating Annoying Minus Signs


Yehuda,

Thanks. That seems pretty good.

We could turn this into a routine that could be mapped onto terms more
generally in an expression.

NDSignSwitch = (-Numerator[#])/(-Denominator[#]) &;

test = {-((2*x)/(-1 + z)), -((2*y)/(-1 + z)), -1};

NDSignSwitch /@ test
{(2*x)/(1 - z), (2*y)/(1 - z), -1}

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/



From: yehuda ben-shimol [mailto:bsyehuda at gmail.com]
To: mathgroup at smc.vnet.net


Hi David,
How about
(- Numerator /@ test)/(- Denominator /@ test)
this is not error prone.
I'm almost certaint that there is more efficient way of doing this.
I'll try to find it later
regards
yehuda


  • Prev by Date: formatting question
  • Next by Date: Re: Improper use of slot
  • Previous by thread: Re: Eliminating Annoying Minus Signs
  • Next by thread: Re: Eliminating Annoying Minus Signs