Approximate Zero Times A Symbol

*To*: mathgroup at smc.vnet.net*Subject*: [mg127060] Approximate Zero Times A Symbol*From*: "djmpark" <djmpark at comcast.net>*Date*: Wed, 27 Jun 2012 04:11:51 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

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

**Follow-Ups**:**Re: Approximate Zero Times A Symbol***From:*Bob Hanlon <hanlonr357@gmail.com>

**Re: Approximate Zero Times A Symbol***From:*Christoph Lhotka <christoph.lhotka@fundp.ac.be>

**Re: Approximate Zero Times A Symbol***From:*Bob Hanlon <hanlonr357@gmail.com>