11.4.11. astroML.datasets.fetch_great_wall¶
-
astroML.datasets.fetch_great_wall(data_home=None, download_if_missing=True, xlim=(- 375, - 175), ylim=(- 300, 200), cosmo=None)[source]¶ Get the 2D SDSS “Great Wall” distribution, following Cowan et al 2008
- Parameters
- data_homeoptional, default=None
Specify another download and cache folder for the datasets. By default all astroML data is stored in ‘~/astroML_data’.
- download_if_missingoptional, default=True
If False, raise a IOError if the data is not locally available instead of trying to download the data from the source site.
- xlim, ylimtuples or None
the limits in Mpc of the data: default values are the same as that used for the plots in Cowan 2008. If set to None, no cuts will be performed.
- cosmoastropy.cosmology instance specifying cosmology
to use when generating the sample. If not provided, a Flat Lambda CDM model with H0=73.2, Om0=0.27, Tcmb0=0 is used.
- Returns
- datandarray, shape = (Ngals, 2)
grid of projected (x, y) locations of galaxies in Mpc