Fix bugs in data_collection.py and add better examples (#126)

* only build design matrices for valid inputs

* remove most OOB treatment in interpolants

* add simple b-spline example

* remove submit arg

* skip examples in pre-commit

* pre-commit

* update func name

* add funcs for powerlawpeak mass, beta spin mag, and mixture iso aligned tilt models

* allow mixing fraction to be different in independent mixture iso aligned tilt model

* make parametric specific run analysis func

* add parametric model example

* fix typo

* remove 4pi factor from dVcdz

* remove minus sign on alpha for clarity

* move 4pi factor to dVcdz in cosmology

* fix mass_1 prior eval

* improve catagorical syntax

* improve dict to xarray for subpops

* add non-IID calculations

* update pip reqs

* bug fix

* pre-commit

* change dl 2 z prior to Mpc from Gpc

* remove .value and var_L

* fix iid spin test

* pre-commit

---------

Co-authored-by: Ben Farr <[email protected]>

.pre-commit-config.yaml

@@ -1,3 +1,4 @@
+exclude: 'examples'
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.3.0