## Command FERRORS

FERRORS /
PERCNT(pp)
NONE
OWN
STATISTIC
THEORY
**Purpose**
Specify errors of experimental data to be fitted.

## Parameter PERCNT

PERCNT(pp)
Each data point has an y-error of **pp** percent of the y-value

## Parameter NONE

No errors are known

## Parameter OWN

Take errors associated with data points itself.

## Parameters STATISTIC

Assume statistical errors computed as square root of y-values

## Parameters THEORY

Errors are derived from the fit function as square root of the
computed function y-values.