Re: Approximate Zero Times A Symbol
- To: mathgroup at smc.vnet.net
- Subject: [mg127080] Re: Approximate Zero Times A Symbol
- From: Peter Breitfeld <phbrf at t-online.de>
- Date: Fri, 29 Jun 2012 04:48:29 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <jsefei$iah$1@smc.vnet.net>
To make these 0. vanish I use:
IntNull[expr_] := ((expr //. Complex[x_, 0.] -> x) //. {0. -> 0})
"djmpark" wrote:
> What is the justification for the following?
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> 0. x + 1. y
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> 0. + 1. y
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> I want to display a dynamic weighted sum of x and y and sometimes one of the
> coefficients becomes zero. I would like to keep both terms (for a steady
> display) and format with NumberForm. If Mathematica is going to drop the x,
> why doesn't it at least also drop the approximate zero?
>
>
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> If I use SetPrecision we obtain:
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> SetPrecision[0. x + 1. y, 10]
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> 1.000000000 y
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> which is at least more consistent, but not what I want either.
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> David Park
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> djmpark at comcast.net
>
> http://home.comcast.net/~djmpark/index.html
>
--
_________________________________________________________________
Peter Breitfeld | Bad Saulgau, Germany | http://www.pBreitfeld.de