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? > > > > 0. x + 1. y > > > > 0. + 1. y > > > > 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? > > > > If I use SetPrecision we obtain: > > > > SetPrecision[0. x + 1. y, 10] > > > > 1.000000000 y > > > > which is at least more consistent, but not what I want either. > > > > David Park > > djmpark at comcast.net > > http://home.comcast.net/~djmpark/index.html > -- _________________________________________________________________ Peter Breitfeld | Bad Saulgau, Germany | http://www.pBreitfeld.de