SEARCH MATHEMATICA 8 DOCUMENTATION

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Computer Arithmetic Package Symbol

MicroscopicErrorPlot

MicroscopicErrorPlot[f, {x, a}]
plots the error incurred by using machine arithmetic to evaluate the expression f in a small neighborhood of a.

MicroscopicErrorPlot[f, {x, a, n}]
plots the error from a-n ulps to a+n ulps.

To use MicroscopicErrorPlot, you first need to load the Computer Arithmetic Package using Needs["ComputerArithmetic`"].

whether to join points

With the setting Joined->Real, the line joining the plot points represents the mapping from the set of real numbers to the error in the machine-number output.