#
# The pytest.param calls seem to get recorded as 2 xfails; I think
# this is for the error and because of warning messages, but it is not
# clear.
#
@requires_data
@requires_fits
@pytest.mark.parametrize("stat",
[None,
stats.Chi2(),
stats.Chi2ConstVar(),
stats.Chi2DataVar(),
stats.Chi2Gehrels(),
stats.Chi2ModVar(),
stats.Chi2XspecVar(),
stats.LeastSq(),
stats.Cash(),
stats.CStat(),
stats.WStat()])
def test_astro_data_plot_with_stat_simple(make_data_path, stat):
from sherpa.astro import io
infile = make_data_path('3c273.pi')
pha = io.read_pha(infile)
# tweak the data set so that we aren't using the default
# options (it shouldn't matter for this test but just
# in case).
#
# Note that background subtraction would normally be an issue
g2.pos = g1.pos + 0.5
g1.fwhm = 0.1
g2.fwhm = 0.1
print(mdl)
ystart = mdl(x)
mplot = plot.ModelPlot()
mplot.prepare(d, mdl)
print(">>> dplot.plot()")
print(">>> mplot.plot(overplot=True)")
print(">>> save to _static/models/combine/model_combine_start.png")
f = fit.Fit(d, mdl, stats.LeastSq())
res = f.fit()
print(res.succeeded)
fplot = plot.FitPlot()
mplot.prepare(d, mdl)
fplot.prepare(dplot, mplot)
print(">>> fplot.plot()")
print(">>> plt.plot(x, ystart, label='Start')")
print(">>> plt.legend(loc=2)")
print(">>> save as docs/_static/models/combine/model_combine.png")
print(mdl)
for p in mdl.pars:
if p.link is None: