def extract_fields(self, objs):
"""
Extract tags from the input structure and add some if needed.
"""
dtype=self.keep_dtype()
new = numpy.zeros(objs.size, dtype=dtype)
esutil.numpy_util.copy_fields(objs, new)
# calculate new fields
new['photoid'] = sdsspy.photoid(new)
flux,ivar=new['modelflux'],new['modelflux_ivar']
ext=new['extinction']
flux_dered,ivar_dered = sdsspy.dered_fluxes(ext, flux, ivar=ivar)
mag_dered,err_dered = sdsspy.util.nmgy2mag(flux_dered, ivar=ivar_dered)
new['modelmag_dered'] = mag_dered
new['modelmag_dered_err'] = err_dered
cmag_dered,cmagerr_dered = sdsspy.make_cmodelmag(objs, dered=True)
new['cmodelmag_dered'] = cmag_dered
new['cmodelmag_dered_err'] = cmagerr_dered
return new
def extract_fields(self, objs, keep):
"""
"""
dtype=[('photoid','i8'),
('ra','f8'),
('dec','f8'),
('modelmag_dered','f4',5),
('modelmag_dered_err','f4',5),
('cmodelmag_dered','f4',5),
('cmodelmag_dered_err','f4',5)]
output = numpy.zeros(keep.size, dtype=dtype)
output['photoid'] = objs['photoid'][keep]
output['ra'] = objs['ra'][keep]
output['dec'] = objs['dec'][keep]
f, ivar = sdsspy.dered_fluxes(objs['extinction'][keep],
objs['modelflux'][keep],
objs['modelflux_ivar'][keep])
mag,err = sdsspy.nmgy2mag(f,ivar)
output['modelmag_dered'] = mag
output['modelmag_dered_err'] = err
output['cmodelmag_dered'] = self.cmodelmag_dered[keep,:]
output['cmodelmag_dered_err'] = self.cmodelmag_dered_err[keep,:]
return output
def add_dered_err_to_columns(self):
"""
I forgot to add errors...
"""
c = self.open_columns()
for filt in ['u','g','r','i','z']:
print("reading extinction for",filt)
ext = c['extinction_'+filt][:]
for type in ['cmodelmag','modelmag']:
outtag = '%s_dered_err_%s' % (type,filt)
print("making:",outtag)
print(" reading fluxes")
if type == 'cmodelmag':
fdev = c['fracpsf_'+filt][:]
devflux = c['devflux_'+filt][:]
devflux_ivar = c['devflux_ivar_'+filt][:]
expflux = c['expflux_'+filt][:]
expflux_ivar = c['expflux_ivar_'+filt][:]
print(" making cmodelmag")
flux, ivar = sdsspy.util._make_cmodelflux_1band(fdev,
devflux, devflux_ivar,
expflux, expflux_ivar)
else:
flux = c['modelflux_'+filt][:]
ivar = c['modelflux_ivar_'+filt][:]
print(" dereddening")
flux, ivar = sdsspy.dered_fluxes(ext, flux, ivar)
print(" making mags")
mag, magerr = sdsspy.nmgy2mag(flux, ivar)
print(" writing data to",outtag)
c.write_column(outtag, magerr, create=True)
def create_output(self, st):
bands = ['u','g','r','i','z']
out_dict = {}
for d in st.dtype.descr:
name = str( d[0] )
if len(d) == 3:
if d[2] == 5:
# ignoring the higher dim stuff
for bandi in xrange(5):
fname = name+'_'+bands[bandi]
out_dict[fname] = st[name][:, bandi]
else:
out_dict[name] = st[name]
if 'devflux' in st.dtype.names:
#cmodelflux, cmodelflux_ivar = sdsspy.make_cmodelflux(st, doivar=True)
cmodelmag_dered, cmodelmag_dered_err = sdsspy.make_cmodelmag(st, dered=True)
modelflux, modelflux_ivar = sdsspy.dered_fluxes(st['extinction'],
st['modelflux'],
st['modelflux_ivar'])
modelmag_dered, modelmag_dered_err = sdsspy.nmgy2mag(modelflux, modelflux_ivar)
for f in sdsspy.FILTERCHARS:
fnum = sdsspy.FILTERNUM[f]
if 'devflux' in st.dtype.names:
out_dict['cmodelflux_'+f] = cmodelmag_dered[:,fnum]
out_dict['cmodelflux_ivar_'+f] = cmodelmag_dered_err[:,fnum]
out_dict['cmodelmag_dered_'+f] = cmodelmag_dered[:,fnum]
out_dict['cmodelmag_dered_err_'+f] = cmodelmag_dered_err[:,fnum]
out_dict['modelmag_dered_'+f] = modelmag_dered[:,fnum]
out_dict['modelmag_dered_err_'+f] = modelmag_dered_err[:,fnum]
out_dict['photoid'] = sdsspy.photoid(st)
self.set_maskflags(out_dict)
# we will add an "survey_primary" column if we are not explicitly
# selecting survey_primary
if self.type not in ['primgal','primstar']:
survey_primary = numpy.zeros(st.size, dtype='i1')
w=self.get_primary_indices(st)
if w.size > 0:
survey_primary[w] = 1
out_dict['survey_primary'] = survey_primary
return out_dict
def create_output(self, st):
import sdsspy
bands = ['u','g','r','i','z']
out_dict = {}
for d in st.dtype.descr:
name = str( d[0] )
if len(d) == 3:
if isinstance(d[2],tuple):
sz=d[2][0]
else:
sz=d[2]
if sz == 5:
for bandi in xrange(5):
fname = name+'_'+bands[bandi]
out_dict[fname] = st[name][:, bandi]
else:
out_dict[name] = st[name]
# match up to sweeps and get some info
print(" matching to primary sweeps")
w=self.sweep_cols['thing_id'].match(st['thing_id'])
#print(" found %s/%s" % (w.size,st.size))
if w.size != st.size:
raise ValueError("Did not match all")
out_dict['primgal_id'] = w
print(" Getting psf ellip")
Irr_psf = st['Irr_psf']
Irc_psf = st['Irc_psf']
Icc_psf = st['Icc_psf']
T_psf = st['Irr_psf'] + st['Icc_psf']
if 'e1' not in st.dtype.names:
e1,e2 = self.make_e1e2(st)
print(" Copying ellip,mags")
for f in sdsspy.FILTERCHARS:
fnum = sdsspy.FILTERNUM[f]
out_dict['e1_psf_'+f] = (Icc_psf[:,fnum]-Irr_psf[:,fnum])/T_psf[:,fnum]
out_dict['e2_psf_'+f] = 2*Irc_psf[:,fnum]/T_psf[:,fnum]
out_dict['modelmag_dered_'+f] = self.sweep_cols['modelmag_dered_'+f][w]
ext = self.sweep_cols['extinction_'+f][w]
out_dict['extinction_'+f] = ext
cmodelname = 'cmodelmag_dered_'+f
if cmodelname in self.sweep_cols:
out_dict[cmodelname] = self.sweep_cols[cmodelname][w]
if self.sweeptype == 'star':
flux = self.sweep_cols['psfflux_'+f][w]
ivar = self.sweep_cols['psfflux_ivar_'+f][w]
flux_dered = sdsspy.dered_fluxes(ext, flux)
mag_dered = sdsspy.nmgy2mag(flux_dered)
out_dict['psfflux_'+f] = flux
out_dict['psfflux_ivar_'+f] = ivar
out_dict['psfmag_dered_'+f] = mag_dered
if 'e1' not in st.dtype.names:
out_dict['e1_'+f] = e1[:,fnum]
out_dict['e2_'+f] = e2[:,fnum]
out_dict['photoid'] = sdsspy.photoid(st)
return out_dict
