- sherpa.astro.ui.save_staterror(id, filename=None, bkg_id=None, ascii=True, clobber=False)
Save the statistical errors to a file.
If the statistical errors have not been set explicitly, then the values calculated by the statistic - such as
chi2datavar- will be used.
ascii (bool, optional) – If
Falsethen the data is written as a FITS format binary table. The default is
True. The exact format of the output file depends on the I/O library in use (Crates or AstroPy).
clobber (bool, optional) – If
None, then this flag controls whether an existing file can be overwritten (
True) or if it raises an exception (
False, the default setting).
sherpa.utils.err.IOErr – If
filenamealready exists and
The function does not follow the normal Python standards for parameter use, since it is designed for easy interactive use. When called with a single un-named argument, it is taken to be the
filenameparameter. If given two un-named arguments, then they are interpreted as the
filenameparameters, respectively. The remaining parameters are expected to be given as named arguments.
The output file contains the columns
Write out the statistical errors from the default data set to the file ‘errs.dat’.
Over-write the file it it already exists, and take the data from the data set “jet”:
>>> save_staterror('jet', 'err.out', clobber=True)
Write the data out in FITS format:
>>> save_staterror('staterr.fits', ascii=False)