Re: standard floating point arithmetic in Mathematica?
- To: mathgroup at smc.vnet.net
- Subject: [mg132486] Re: standard floating point arithmetic in Mathematica?
- From: Bob Hanlon <hanlonr357 at gmail.com>
- Date: Fri, 28 Mar 2014 03:31:50 -0400 (EDT)
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It is not clear to me whether you want only results that are Real to be displayed at that precision or all reals in an expression. Use one of the following $Post = If[Head[#]===Real,SetPrecision[#,17],#]&; .1+.2 0.30000000000000004 1/3. E^(-Pi x) 0.333333 E^(-\[Pi] x) %//N 0.333333 2.71828^(-3.14159 x) $Post = (# /. x_Real:>SetPrecision[x,17])&; .1+.2 0.30000000000000004 1/3. E^(-Pi x) 0.33333333333333331 E^(-\[Pi] x) %//N 0.33333333333333331 2.7182818284590451^(-3.1415926535897931 x) Bob Hanlon On Thu, Mar 27, 2014 at 5:00 AM, Alan <alan.isaac at gmail.com> wrote: > I would like to illustrate some limitations with floating point > calculations. Can I force Mathematica to do floating point computations at > a standard float size and the display the full results (as the same size > float)? > > E.g., if I enter > 0.1+0.2 > I would like to see > 0.30000000000000004 > > Thanks, > Alan Isaac > >
- References:
- standard floating point arithmetic in Mathematica?
- From: Alan <alan.isaac@gmail.com>
- standard floating point arithmetic in Mathematica?