"""
Bimodal fields
--------------

We provide two transformations to obtain bimodal distributions:

* `arcsin <https://en.wikipedia.org/wiki/Arcsine_distribution>`__.
* `uquad <https://en.wikipedia.org/wiki/U-quadratic_distribution>`__.

Both transformations will preserve the mean and variance of the given field by default.

See: :any:`transform.normal_to_arcsin` and :any:`transform.normal_to_uquad`
"""

import gstools as gs

# structured field with a size of 100x100 and a grid-size of 1x1
x = y = range(100)
model = gs.Gaussian(dim=2, var=1, len_scale=10)
srf = gs.SRF(model, seed=20170519)
field = srf.structured([x, y])
srf.transform("normal_to_arcsin")  # also "arcsin" works
srf.plot()