description: fiteval assumes that one data set is a fit to the other, and evaluates how good a fit it is.
The abscissa in the two files are by default assumed to be identical in value and number,
and in the same order.
files: fit_file contains the data set that is being evaluated as a fit to the
data set in data_file.
options:
match
Requests that fiteval attempt to match the abscissa values from the
two files explicitly, rather than assuming that they are identical.
fiteval will discard data points from the beginning and end of
either data set in order to accomplish this. If a tolerance value
is given, then abscissae within this value of each other are considered
identical. The default tolerance is .
unweighted
By default, if data_file contains uncertainty values, the fit is
evaluated using weighted statistics. This may be changed by giving the
unweighted option.