def fit_pix_values(t_ccd, esec, id=1):
logger = logging.getLogger("sherpa")
logger.setLevel(logging.WARN)
data_id = id
ui.clean()
ui.set_method('simplex')
ui.load_user_model(dark_scale_model, 'model')
ui.add_user_pars('model', ['scale', 'dark_t_ref'])
ui.set_model(data_id, 'model')
ui.load_arrays(
data_id,
np.array(t_ccd),
np.array(esec),
)
ui.set_staterror(data_id, 30 * np.ones(len(t_ccd)))
model.scale.val = 0.588
model.scale.min = 0.3
model.scale.max = 1.0
model.dark_t_ref.val = 500
ui.freeze(model.scale)
# If more than 5 degrees in the temperature range,
# thaw and fit for model.scale. Else just use/return
# the fit of dark_t_ref
if np.max(t_ccd) - np.min(t_ccd) > 2:
# Fit first for dark_t_ref
ui.fit(data_id)
ui.thaw(model.scale)
ui.fit(data_id)
return ui.get_fit_results(), ui.get_model(data_id)
def fit(self, method='simplex'):
"""Initiate a fit of the model using Sherpa.
:param method: Method to be used to fit the model (e.g. simplex, levmar, or moncar)
"""
dummy_data = np.zeros(1)
dummy_times = np.arange(1)
ui.load_arrays(1, dummy_times, dummy_data)
ui.set_method(method)
ui.get_method().config.update(sherpa_configs.get(method, {}))
ui.load_user_model(CalcModel(self.model, self.fit_logger),
'xijamod') # sets global xijamod
ui.add_user_pars('xijamod', self.model.parnames)
ui.set_model(1, 'xijamod')
calc_stat = CalcStat(self.model, self.fit_logger)
ui.load_user_stat('xijastat', calc_stat, lambda x: np.ones_like(x))
ui.set_stat(xijastat)
# Set frozen, min, and max attributes for each xijamod parameter
for par in self.model.pars:
xijamod_par = getattr(xijamod, par.full_name)
xijamod_par.val = par.val
xijamod_par.frozen = par.frozen
xijamod_par.min = par.min
xijamod_par.max = par.max
ui.fit(1)
self.save_snapshot(fit_stat=calc_stat.min_fit_stat, method=method)
def fit(self):
dummy_data = np.zeros(1)
dummy_times = np.arange(1)
ui.load_arrays(1, dummy_times, dummy_data)
ui.set_method(self.method)
ui.get_method().config.update(sherpa_configs.get(self.method, {}))
ui.load_user_model(CalcModel(self.model), 'xijamod') # sets global xijamod
ui.add_user_pars('xijamod', self.model.parnames)
ui.set_model(1, 'xijamod')
calc_stat = CalcStat(self.model, self.child_pipe)
ui.load_user_stat('xijastat', calc_stat, lambda x: np.ones_like(x))
ui.set_stat(xijastat)
# Set frozen, min, and max attributes for each xijamod parameter
for par in self.model.pars:
xijamod_par = getattr(xijamod, par.full_name)
xijamod_par.val = par.val
xijamod_par.frozen = par.frozen
xijamod_par.min = par.min
xijamod_par.max = par.max
if any(not par.frozen for par in self.model.pars):
try:
ui.fit(1)
calc_stat.message['status'] = 'finished'
logging.debug('Fit finished normally')
except FitTerminated as err:
calc_stat.message['status'] = 'terminated'
logging.debug('Got FitTerminated exception {}'.format(err))
self.child_pipe.send(calc_stat.message)
def fit(self):
dummy_data = np.zeros(1)
dummy_times = np.arange(1)
ui.load_arrays(1, dummy_times, dummy_data)
ui.set_method(self.method)
ui.get_method().config.update(sherpa_configs.get(self.method, {}))
ui.load_user_model(CalcModel(self.model), 'xijamod') # sets global xijamod
ui.add_user_pars('xijamod', self.model.parnames)
ui.set_model(1, 'xijamod')
calc_stat = CalcStat(self.model, self.child_pipe, self.maxiter)
ui.load_user_stat('xijastat', calc_stat, lambda x: np.ones_like(x))
ui.set_stat(xijastat)
# Set frozen, min, and max attributes for each xijamod parameter
for par in self.model.pars:
xijamod_par = getattr(xijamod, par.full_name)
xijamod_par.val = par.val
xijamod_par.frozen = par.frozen
xijamod_par.min = par.min
xijamod_par.max = par.max
if any(not par.frozen for par in self.model.pars):
try:
ui.fit(1)
calc_stat.message['status'] = 'finished'
fit_logger.info('Fit finished normally')
except FitTerminated as err:
calc_stat.message['status'] = 'terminated'
fit_logger.warning('Got FitTerminated exception {}'.format(err))
self.child_pipe.send(calc_stat.message)
def test_user_model1d_fit():
"""Check can use in a fit."""
mname = "test_model"
ui.load_user_model(um_line, mname)
ui.add_user_pars(mname, ["slope", "intercept"],
parvals = [1.0, 1.0])
mdl = ui.get_model_component(mname)
x = numpy.asarray([-2.4, 2.3, 5.4, 8.7, 12.3])
# Set up the data to be scattered around y = -0.2 x + 2.8
# Pick the deltas so that they sum to 0 (except for central
# point)
#
slope = -0.2
intercept = 2.8
dy = numpy.asarray([0.1, -0.2, 0.14, -0.1, 0.2])
ydata = x * slope + intercept + dy
ui.load_arrays(1, x, ydata)
ui.set_source(mname)
ui.ignore(5.0, 6.0) # drop the central bin
ui.set_stat('leastsq')
ui.set_method('simplex')
ui.fit()
fres = ui.get_fit_results()
assert fres.succeeded
assert fres.parnames == ('test_model.slope', 'test_model.intercept')
assert fres.numpoints == 4
assert fres.dof == 2
# Tolerance has been adjusted to get the tests to pass on my
# machine. It's really just to check that the values have chanegd
# from their default values.
#
assert fres.parvals[0] == pytest.approx(slope, abs=0.01)
assert fres.parvals[1] == pytest.approx(intercept, abs=0.05)
# Thse should be the same values, so no need to use pytest.approx
# (unless there's some internal translation between types done
# somewhere?).
#
assert mdl.slope.val == fres.parvals[0]
assert mdl.intercept.val == fres.parvals[1]
def test_user_model1d_fit():
"""Check can use in a fit."""
mname = "test_model"
ui.load_user_model(um_line, mname)
ui.add_user_pars(mname, ["slope", "intercept"],
parvals = [1.0, 1.0])
mdl = ui.get_model_component(mname)
x = numpy.asarray([-2.4, 2.3, 5.4, 8.7, 12.3])
# Set up the data to be scattered around y = -0.2 x + 2.8
# Pick the deltas so that they sum to 0 (except for central
# point)
#
slope = -0.2
intercept = 2.8
dy = numpy.asarray([0.1, -0.2, 0.14, -0.1, 0.2])
ydata = x * slope + intercept + dy
ui.load_arrays(1, x, ydata)
ui.set_source(mname)
ui.ignore(5.0, 6.0) # drop the central bin
ui.set_stat('leastsq')
ui.set_method('simplex')
ui.fit()
fres = ui.get_fit_results()
assert fres.succeeded
assert fres.parnames == ('test_model.slope', 'test_model.intercept')
assert fres.numpoints == 4
assert fres.dof == 2
# Tolerance has been adjusted to get the tests to pass on my
# machine. It's really just to check that the values have chanegd
# from their default values.
#
assert fres.parvals[0] == pytest.approx(slope, abs=0.01)
assert fres.parvals[1] == pytest.approx(intercept, abs=0.05)
# Thse should be the same values, so no need to use pytest.approx
# (unless there's some internal translation between types done
# somewhere?).
#
assert mdl.slope.val == fres.parvals[0]
assert mdl.intercept.val == fres.parvals[1]
def setup_err_estimate_multi_ids(strings=False):
"""Create the environment used in test_err_estimate_xxx tests.
The model being fit is polynom1d with c0=50 c1=-2
and was evaluated and passed through sherpa.utils.poisson_noise
to create the datasets.
Since we can have string or integer ids we allow either,
but do not try to mix them.
"""
if strings:
id1 = "1"
id2 = "2"
id3 = "3"
else:
id1 = 1
id2 = 2
id3 = 3
ui.load_arrays(id1, [1, 3, 7, 12], [50, 40, 27, 20])
ui.load_arrays(id2, [-3, 4, 5], [55, 34, 37])
ui.load_arrays(id3, [10, 12, 20], [24, 26, 7])
# NOTE: dataset "not-used" is not used in the fit and is not
# drawn from the distributino used to create the other datasets.
#
ui.load_arrays("not-used", [2000, 2010, 2020], [10, 12, 14])
mdl = ui.create_model_component("polynom1d", "mdl")
mdl.c1.thaw()
ui.set_source(id1, mdl)
ui.set_source(id2, mdl)
ui.set_source(id3, mdl)
# apply the model to dataset not-used just so we can check we
# don't end up using it
mdl_not_used = ui.create_model_component("scale1d", "mdl_not_used")
ui.set_source("not-used", mdl + mdl_not_used)
# use cstat so we have an approximate goodness-of-fit just to
# check we are getting sensible results.
#
ui.set_stat("cstat")
ui.set_method("simplex")
def fit_model(
model,
comm=None,
method='simplex',
config=None,
nofit=None,
freeze_pars=freeze_pars,
thaw_pars=[],
):
dummy_data = np.zeros(1)
dummy_times = np.arange(1)
ui.load_arrays(1, dummy_times, dummy_data)
ui.set_method(method)
ui.get_method().config.update(config or sherpa_configs.get(method, {}))
ui.load_user_model(CalcModel(model, comm), 'xijamod')
ui.add_user_pars('xijamod', model.parnames)
ui.set_model(1, 'xijamod')
fit_parnames = set()
for parname, parval in zip(model.parnames, model.parvals):
getattr(xijamod, parname).val = parval
fit_parnames.add(parname)
if any([re.match(x + '$', parname) for x in freeze_pars]):
fit_logger.info('Freezing ' + parname)
ui.freeze(getattr(xijamod, parname))
fit_parnames.remove(parname)
if any([re.match(x + '$', parname) for x in thaw_pars]):
fit_logger.info('Thawing ' + parname)
ui.thaw(getattr(xijamod, parname))
fit_parnames.add(parname)
if 'tau' in parname:
getattr(xijamod, parname).min = 0.1
calc_stat = CalcStat(model, comm)
ui.load_user_stat('xijastat', calc_stat, lambda x: np.ones_like(x))
ui.set_stat(xijastat)
if fit_parnames and not nofit:
ui.fit(1)
else:
model.calc()
def fit_model(model,
comm=None,
method='simplex',
config=None,
nofit=None,
freeze_pars=freeze_pars,
thaw_pars=[],
):
dummy_data = np.zeros(1)
dummy_times = np.arange(1)
ui.load_arrays(1, dummy_times, dummy_data)
ui.set_method(method)
ui.get_method().config.update(config or sherpa_configs.get(method, {}))
ui.load_user_model(CalcModel(model, comm), 'xijamod')
ui.add_user_pars('xijamod', model.parnames)
ui.set_model(1, 'xijamod')
fit_parnames = set()
for parname, parval in zip(model.parnames, model.parvals):
getattr(xijamod, parname).val = parval
fit_parnames.add(parname)
if any([re.match(x + '$', parname) for x in freeze_pars]):
fit_logger.info('Freezing ' + parname)
ui.freeze(getattr(xijamod, parname))
fit_parnames.remove(parname)
if any([re.match(x + '$', parname) for x in thaw_pars]):
fit_logger.info('Thawing ' + parname)
ui.thaw(getattr(xijamod, parname))
fit_parnames.add(parname)
if 'tau' in parname:
getattr(xijamod, parname).min = 0.1
calc_stat = CalcStat(model, comm)
ui.load_user_stat('xijastat', calc_stat, lambda x: np.ones_like(x))
ui.set_stat(xijastat)
if fit_parnames and not nofit:
ui.fit(1)
else:
model.calc()
def fit_pix_values(t_ccd, esec, id=1):
logger = logging.getLogger("sherpa")
logger.setLevel(logging.WARN)
data_id = id
ui.clean()
ui.set_method("simplex")
ui.load_user_model(dark_scale_model, "model")
ui.add_user_pars("model", ["scale", "dark_t_ref"])
ui.set_model(data_id, "model")
ui.load_arrays(data_id, np.array(t_ccd), np.array(esec), 0.1 * np.ones(len(t_ccd)))
model.scale.val = 0.70
model.dark_t_ref.val = 500
ui.freeze(model.scale)
# If more than 5 degrees in the temperature range,
# thaw and fit for model.scale. Else just use/return
# the fit of dark_t_ref
ui.fit(data_id)
ui.thaw(model.scale)
ui.fit(data_id)
return ui.get_fit_results(), ui.get_model(data_id)
def fit_gauss_sbp():
g1 = ui.gauss1d.g1
ui.set_model(sbp + g1)
ui.set_method('simplex')
g1.fwhm = 5.0
g1.pos = 7.0
g1.ampl = 30000.
ui.freeze(sbp.gamma1)
ui.freeze(sbp.gamma2)
ui.freeze(sbp.x_b)
ui.freeze(sbp.x_r)
ui.freeze(g1.fwhm)
ui.freeze(g1.pos)
ui.thaw(g1.ampl)
ui.fit()
ui.thaw(g1.fwhm)
ui.thaw(g1.pos)
ui.fit()
ui.thaw(sbp)
ui.freeze(sbp.x_r)
ui.fit()
# coding: utf-8
import sherpa.ui as ui
ui.load_data("default_interp", "load_template_with_interpolation-bb_data.dat")
ui.load_template_model('bb1', "bb_index.dat")
ui.set_model("default_interp", bb1)
ui.set_method('gridsearch')
ui.set_method_opt('sequence', ui.get_model_component('bb1').parvals)
ui.fit("default_interp")
def run_fits(obsids, ax, user_pars=None,
fixed_pars=None, guess_pars=None, label='model',
per_obs_dir='per_obs_nfits',
outdir=None, redo=False):
if len(obsids) == 0:
print "No obsids, nothing to fit"
return None
if user_pars is None:
user_pars = USER_PARS
if not os.path.exists(per_obs_dir):
os.makedirs(per_obs_dir)
obsfits = []
for obsid in obsids:
outdir = os.path.join(per_obs_dir, 'obs{:05d}'.format(obsid))
if not os.path.exists(outdir):
os.makedirs(outdir)
model_file = os.path.join(outdir, '{}.pkl'.format(label))
if os.path.exists(model_file) and not redo:
#logger.warn('Using previous fit found in %s' % model_file)
print model_file
mod_pick = open(model_file, 'r')
modelfit = cPickle.load( mod_pick )
mod_pick.close()
obsfits.append(modelfit)
continue
modelfit = {'label': obsid}
ui.clean()
data_id = 0
obsdir = "%s/obs%05d" % (DATADIR, obsid)
tf = open(os.path.join(obsdir,'tilt.pkl'), 'r')
tilt = cPickle.load(tf)
tf.close()
pf = open(os.path.join(obsdir, 'pos.pkl'), 'r')
pos = cPickle.load(pf)
pf.close()
pos_data = pos[ax]
point_error = 5
pos_data_mean = np.mean(pos_data)
ui.set_method('simplex')
# Fit a line to get more reasonable errors
init_staterror = np.zeros(len(pos_data))+point_error
ui.load_arrays(data_id,
pos['time']-pos['time'][0],
pos_data-np.mean(pos_data),
init_staterror)
ui.polynom1d.ypoly
ui.set_model(data_id, 'ypoly')
ui.thaw(ypoly.c0, ypoly.c1)
ui.fit(data_id)
fit = ui.get_fit_results()
calc_staterror = init_staterror * np.sqrt(fit.rstat)
ui.set_staterror(data_id, calc_staterror)
# Confirm those errors
ui.fit(data_id)
fit = ui.get_fit_results()
if ( abs(fit.rstat-1) > .2):
raise ValueError('Reduced statistic not close to 1 for error calc')
# Load up data to do the real model fit
fit_times = pos['time']
tm_func = tilt_model(tilt,
fit_times,
user_pars=user_pars)
ui.get_data(data_id).name = str(obsid)
ui.load_user_model(tm_func, 'tiltm%d' % data_id)
ui.add_user_pars('tiltm%d' % data_id, user_pars)
ui.set_method('simplex')
ui.set_model(data_id, 'tiltm%d' % (data_id))
ui.set_par('tiltm%d.diam' % data_id, 0)
if fixed_pars is not None and ax in fixed_pars:
for par in fixed_pars[ax]:
ui.set_par('tiltm{}.{}'.format(0, par), fixed_pars[ax][par])
ui.freeze('tiltm{}.{}'.format(0, par))
if guess_pars is not None and ax in guess_pars:
for par in guess_pars[ax]:
ui.set_par('tiltm{}.{}'.format(0, par), guess_pars[ax][par])
ui.show_all()
# Fit the tilt model
ui.fit(data_id)
fitres = ui.get_fit_results()
ui.confidence(data_id)
myconf = ui.get_confidence_results()
# save_fits(ax=ax, fit=fitres, conf=myconf, outdir=outdir)
# plot_fits(ids,outdir=os.path.join(outdir,'fit_plots'))
axmod = dict(fit=fitres, conf=myconf)
for idx, modpar in enumerate(myconf.parnames):
par = modpar.lstrip('tiltm0.')
axmod[par] = ui.get_par('tiltm0.%s' % par).val
axmod["{}_parmax".format(par)] = myconf.parmaxes[idx]
axmod["{}_parmin".format(par)] = myconf.parmins[idx]
modelfit[ax] = axmod
mod_pick = open(model_file, 'w')
cPickle.dump( modelfit, mod_pick)
mod_pick.close()
obsfits.append(modelfit)
plot_fits([dict(obsid=obsid, data_id=data_id, ax=ax)],
posdir=obsdir,
outdir=outdir)
return obsfits
# return np.zeros_like(data)
for limit in [50, 75, 100, 125, 150, 200, 1000]:
warm_frac = data[range_type][mag][ok]["n{}".format(limit)]
print "range_type {}".format(range_type)
print "mag {}".format(mag)
print "limit is {}".format(limit)
extent = np.max(warm_frac) - np.min(warm_frac)
wp_min = np.min(warm_frac)
warm_frac = warm_frac - wp_min
def scaled_warm_frac(pars, x):
scaled = pars[1] + warm_frac * pars[0]
return scaled
data_id = 1
ui.set_method("simplex")
ui.set_stat("chi2datavar")
# ui.set_stat('leastsq')
# ui.load_user_stat("chi2custom", my_chi2, my_err)
# ui.set_stat(chi2custom)
ui.load_user_model(scaled_warm_frac, "model")
ui.add_user_pars("model", ["scale", "offset"])
ui.set_model(data_id, "model")
ui.load_arrays(data_id, np.array(times), np.array(bad_frac))
fmod = ui.get_model_component("model")
fmod.scale.min = 1e-9
max_err = np.max([data[range_type][mag][ok]["err_high"], data[range_type][mag][ok]["err_low"]], axis=0)
ui.set_staterror(data_id, max_err)
ui.fit(data_id)
f = ui.get_fit_results()
scale = f.rstat ** 0.5
# coding: utf-8
import sherpa.ui as ui
ui.load_data("bb_data.dat")
ui.load_template_model('bb1', "bb_index.dat", template_interpolator_name=None)
ui.set_method('gridsearch')
ui.set_method_opt('sequence', [[2234, 0],[3512,0]])
ui.set_source('bb1')
ui.fit()
err_high[err_high == 0] = .0001
err_low[err_low == 0] = .0001
for limit in warm_limits:
print "range type {}".format(range_type)
print "mag {}".format(mag)
print "limit is {}".format(limit)
print "ftype {}".format(limit)
warm_frac = data[range_type][mag][ok]['n{}'.format(limit)]
extent = np.max(warm_frac) - np.min(warm_frac)
wp_min = np.min(warm_frac)
warm_frac = warm_frac - wp_min
def scaled_warm_frac(pars, x):
scaled = pars[1] + warm_frac * pars[0]
return scaled
data_id = 1
ui.set_method('simplex')
ui.set_stat('chi2datavar')
#ui.set_stat('leastsq')
#ui.load_user_stat("chi2custom", my_chi2, my_err)
#ui.set_stat(chi2custom)
ui.load_user_model(scaled_warm_frac, 'model')
ui.add_user_pars('model', ['scale', 'offset'])
ui.set_model(data_id, 'model')
ui.load_arrays(data_id,
np.array(times),
np.array(bad_frac))
fmod = ui.get_model_component('model')
fmod.scale.min = 1e-9
fmod.offset.val = 0
ui.freeze(fmod.offset)
max_err = np.max([err_high, err_low], axis=0)
def run_fits(obsids,
ax,
user_pars=None,
fixed_pars=None,
guess_pars=None,
label='model',
per_obs_dir='per_obs_nfits',
outdir=None,
redo=False):
if len(obsids) == 0:
print "No obsids, nothing to fit"
return None
if user_pars is None:
user_pars = USER_PARS
if not os.path.exists(per_obs_dir):
os.makedirs(per_obs_dir)
obsfits = []
for obsid in obsids:
outdir = os.path.join(per_obs_dir, 'obs{:05d}'.format(obsid))
if not os.path.exists(outdir):
os.makedirs(outdir)
model_file = os.path.join(outdir, '{}.pkl'.format(label))
if os.path.exists(model_file) and not redo:
#logger.warn('Using previous fit found in %s' % model_file)
print model_file
mod_pick = open(model_file, 'r')
modelfit = cPickle.load(mod_pick)
mod_pick.close()
obsfits.append(modelfit)
continue
modelfit = {'label': obsid}
ui.clean()
data_id = 0
obsdir = "%s/obs%05d" % (DATADIR, obsid)
tf = open(os.path.join(obsdir, 'tilt.pkl'), 'r')
tilt = cPickle.load(tf)
tf.close()
pf = open(os.path.join(obsdir, 'pos.pkl'), 'r')
pos = cPickle.load(pf)
pf.close()
pos_data = pos[ax]
point_error = 5
pos_data_mean = np.mean(pos_data)
ui.set_method('simplex')
# Fit a line to get more reasonable errors
init_staterror = np.zeros(len(pos_data)) + point_error
ui.load_arrays(data_id, pos['time'] - pos['time'][0],
pos_data - np.mean(pos_data), init_staterror)
ui.polynom1d.ypoly
ui.set_model(data_id, 'ypoly')
ui.thaw(ypoly.c0, ypoly.c1)
ui.fit(data_id)
fit = ui.get_fit_results()
calc_staterror = init_staterror * np.sqrt(fit.rstat)
ui.set_staterror(data_id, calc_staterror)
# Confirm those errors
ui.fit(data_id)
fit = ui.get_fit_results()
if (abs(fit.rstat - 1) > .2):
raise ValueError('Reduced statistic not close to 1 for error calc')
# Load up data to do the real model fit
fit_times = pos['time']
tm_func = tilt_model(tilt, fit_times, user_pars=user_pars)
ui.get_data(data_id).name = str(obsid)
ui.load_user_model(tm_func, 'tiltm%d' % data_id)
ui.add_user_pars('tiltm%d' % data_id, user_pars)
ui.set_method('simplex')
ui.set_model(data_id, 'tiltm%d' % (data_id))
ui.set_par('tiltm%d.diam' % data_id, 0)
if fixed_pars is not None and ax in fixed_pars:
for par in fixed_pars[ax]:
ui.set_par('tiltm{}.{}'.format(0, par), fixed_pars[ax][par])
ui.freeze('tiltm{}.{}'.format(0, par))
if guess_pars is not None and ax in guess_pars:
for par in guess_pars[ax]:
ui.set_par('tiltm{}.{}'.format(0, par), guess_pars[ax][par])
ui.show_all()
# Fit the tilt model
ui.fit(data_id)
fitres = ui.get_fit_results()
ui.confidence(data_id)
myconf = ui.get_confidence_results()
# save_fits(ax=ax, fit=fitres, conf=myconf, outdir=outdir)
# plot_fits(ids,outdir=os.path.join(outdir,'fit_plots'))
axmod = dict(fit=fitres, conf=myconf)
for idx, modpar in enumerate(myconf.parnames):
par = modpar.lstrip('tiltm0.')
axmod[par] = ui.get_par('tiltm0.%s' % par).val
axmod["{}_parmax".format(par)] = myconf.parmaxes[idx]
axmod["{}_parmin".format(par)] = myconf.parmins[idx]
modelfit[ax] = axmod
mod_pick = open(model_file, 'w')
cPickle.dump(modelfit, mod_pick)
mod_pick.close()
obsfits.append(modelfit)
plot_fits([dict(obsid=obsid, data_id=data_id, ax=ax)],
posdir=obsdir,
outdir=outdir)
return obsfits
trend_date_start = '2008:001:00:00:00.000'
fail_types = {'no_trak' : 1,
'bad_trak' : 2,
'obc_bad' : 3}
ui.clean()
for ftype in fail_types:
filename = "by%s_data_%s.txt" % (trend_type, ftype)
rates = asciitable.read(filename)
data_id = fail_types[ftype]
ui.set_method('simplex')
ui.load_arrays(data_id,
rates['time'],
rates['rate'])
ui.set_staterror(data_id,
rates['err'])
ftype_poly = ui.polynom1d(ftype)
ui.set_model(data_id, ftype_poly)
ui.thaw(ftype_poly.c0)
ui.thaw(ftype_poly.c1)
ui.notice(DateTime(trend_date_start).frac_year)
ui.fit(data_id)
ui.notice()
myfit = ui.get_fit_results()
axplot = ui.get_model_plot(data_id)