Re: Next representable number

*To*: mathgroup at smc.vnet.net*Subject*: [mg73589] Re: Next representable number*From*: Bill Rowe <readnewsciv at sbcglobal.net>*Date*: Thu, 22 Feb 2007 04:40:09 -0500 (EST)

On 2/21/07 at 1:53 AM, andrew.j.moylan at gmail.com (Andrew Moylan) wrote: >What's a neat way to determine the next (higher) representable >number (at a given precision)? That is, I want f[x] to be the >smallest representable number (at precision Precision[x]) that's >larger than x. Take a look at the functions in the package NumericalMath`Microscope` =46or example In[1]:= <<NumericalMath` In[2]:= Ulp[2.] Out[2]= 2.220446049250313*^-16 indicating the nearest machine numbers to 2 on my machine are 2.2E-16 away from 2. Note, these results are platform dependent. -- To reply via email subtract one hundred and four