# eps

## Purpose

Floating-point relative accuracy.

## Synopsis

    eps

## Description

`eps` is a permanent variable whose value is initially the distance from 1.0 to the next largest floating-point number. It can be assigned any value, including 0. `eps` is a default tolerance for `pinv` and `rank`, as well as several other MATLAB functions, so changing the value of `eps` changes the way some functions operate. On machines with IEEE floating-point arithmetic, `eps = 2^(-52)`, which is roughly 2.22e-16.

## See Also

`isieee`, `realmax`, `realmin`

(c) Copyright 1994 by The MathWorks, Inc.