obiwan.draw_radec_color_z¶

Draw random location and galaxy properties from Gaussian Mixtures

Classes

Functions

class obiwan.draw_radec_color_z.GaussianMixtureModel(weights, means, covars, py=None, covar_type='full', is1D=False)[source]¶

John’s class to read, write, and sample from a mixture model.

Parameters:	weights,means,covars – array-like, from mixture fit covar_type – usually ‘full’ py – one of [‘27’,‘36’]

static load(name, py=None, is1D=False, indir='./')[source]¶

name: prefix to _weights.txt or _means.txt

sample_py3()[source]¶

Copied from sklearn’s mixture.GaussianMixture().sample()

obiwan.draw_radec_color_z.draw_points_cosmos(radec, unique_ids, obj='star', seed=1, outdir='./', startid=1)[source]¶

Parameters:	radec – dict with keys ra1,ra2,dec1,dec2 the ra,dec limits for the sample unique_ids – list of unique integers for each draw obj – star,elg,lrg,qso seed – to initialize random number generator outdir – dir to write randoms to
Returns:	Nothing, but write a fits_table containing the unique id, ra, dec and color + redshift + morphology info for each source

obiwan.draw_radec_color_z.draw_points_desi(radec, unique_ids, obj='star', seed=1, outdir='./', startid=1)[source]¶

Parameters:	radec – dict with keys ra1,ra2,dec1,dec2 the ra,dec limits for the sample unique_ids – list of unique integers for each draw obj – star,elg,lrg,qso seed – to initialize random number generator outdir – dir to write randoms to
Returns:	Nothing, but write a fits_table containing the unique id, ra, dec and color + redshift + morphology info for each source

obiwan.draw_radec_color_z.draw_points_eboss(radec, unique_ids, obj='star', seed=1, outdir='./', startid=1)[source]¶

Parameters:	radec – dict with keys ra1,ra2,dec1,dec2 the ra,dec limits for the sample unique_ids – list of unique integers for each draw obj – star,elg,lrg,qso seed – to initialize random number generator outdir – dir to write randoms to
Returns:	Nothing, but write a fits_table containing the unique id, ra, dec and color + redshift + morphology info for each source

obiwan.draw_radec_color_z.get_area(radec)[source]¶

returns area on sphere between ra1,ra2,dec2,dec1 https://github.com/desihub/imaginglss/model/brick.py#L64, self.area=…

obiwan.draw_radec_color_z.get_radec(radec, ndraws=1, random_state=<mtrand.RandomState object>)[source]¶

Draws ndraws samples of Ra,Dec from the unit sphere.

Parameters:	radec – dict with keys ra1,ra2,dec1,dec2 the ra,dec limits for the sample ndraws – number of samples randome_state – numpy random number generator
Returns:	tuple of arrays having length ndraws
Return type:	ra,dec

Note

Taken from https://github.com/desihub/imaginglss/blob/master/scripts/imglss-mpi-make-random.py#L55

obiwan.draw_radec_color_z.mkdir_needed(d)[source]¶

make each needed directory d= dictionary, vars(args)

obiwan.draw_radec_color_z.mog_param_dir()[source]¶

path to Mixture of Gaussian directory, containing the fitted params

obiwan.draw_radec_color_z.write_calling_seq(d)[source]¶

each *_randoms/ directory should have a file listing how randoms were created

Parameters:	d – dict, vars(args)