This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


plots the error incurred by using machine arithmetic to evaluate the expression f in a small neighborhood of a.

plots the error from ulps to ulps.
  • The scale on the vertical axis represents the error in ulps.
  • The following option can be given:
JoinedTruewhether 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.