Previously we masked points that are further than a "typical" distance
from any site. This was determined as the minimal nearest-neighbor
distance from 10 arbitrarily chosen sites. Now we mask points where
the bump function is zero (as it has finite support).

Closes #219.

Previously we had forgotten the padding, so the mask was applied
at the wrong position.

Refactor 'plotter.density' into 'plotter.scalarplot' and
fix up plotter docstrings.

Now 'plotter.density' is just the composition of
'interpolate_density' and 'scalarplot', which makes it easier
for users to customise if they need.

See merge request kwant/kwant!223

Previously 'plotter.density' was not as well factored as
'plotter.current', which made it hard to compose, e.g. for
passing custom parameters to 'plotter.interpolate_density'.

Gitlab now has built-in mirroring, so we don't need to have a CI
step for this now.

Allow different lattice spacing in each dimension for 'kwant.continuum'. Also simplify the processing of
'grid' and 'grid_spacing' and fix up some docstrings

Closes #197

See merge request kwant/kwant!220

Python's lack of block scope means that we should avoid
temporaries where they don't significantly clarify meaning

Previously parts of the docstrings for 'density' and 'current'
had been switched.

Kwant no longer builds with Cython 0.22, and our oldest
supported operating systems ship with at least 0.24.3
as of now.

Closes #204

Rafal Skolasinski authored 6 years ago and Joseph Weston committed 6 years ago

Previously we were manually computing the position from
the site tag an an extra 'grid_spacing' parameter. Even
though we now have one additional Python function call,
using the position as determined by the underlying lattice
is less susceptible to bugs.

Closes #199.

Add density plotter, the analogue to 'kwant.plotter.current'
for scalar fields.

Closes #157

See merge request kwant/kwant!214

Also add reference documentation for 'density'.

This helps distinguish where the system is and results in plots
that are easier to interpret.

Now it will be relatively straightforward to factor out
_interpolate_field to Cython or C.

This is copy/paste from 'interpolate_current' with minimal changes.

Allow Builders to substitute parameter names

Closes #142

See merge request !215

This change is backwards compatible and will make the intention
more clear when addressing the output.

Thanks to Alexandre Bernard for reporting this.
https://mailman-mail5.webfaction.com/pipermail/kwant-devel/2018-May/000088.html

Because of the incorrect name, the example in the docstring of lamdify
was not even visible in the documentation.

Previously we used the matplotlib default behavior of setting
the colormap limits (vmin and vmax) to the limits of the plotted
data, if they are not provided by the user. Now we set the
colormap limits to the 2nd and 98th percentile of the input
data, and stretch the limits by 10% on either end in an attempt
to include all the data in the limits. If we cannot do so
we set the limits to the percentiles plus the stretch
and issue a warning.

Also, whenever the data falls outside the colorbar limits
(even when the latter are set by the user) we set the appropriate
ends of the colorbar to be pointy, indicating that the data
extends beyond the colorbar.

Closes #183

Closes #171