Merge pull request #668 from pfebrer/matrix_plot

enh: Added a matrix plot

CHANGELOG.md

@@ -28,6 +28,7 @@ we hit release version 1.0.0.
   as well as `sisl.geom.cgnr`)
 - Creation of [n]-triangulenes (`sisl.geom.triangulene`)
 - added `offset` argument in `Geometry.add_vacuum` to enable shifting atomic coordinates
+- A new `AtomicMatrixPlot` to plot sparse matrices, #668
 
 ### Fixed
 - `SparseCSR` ufunc handling, in some corner cases could the dtype casting do things
@@ -40,7 +41,7 @@ we hit release version 1.0.0.
 - `Lattice` objects now issues a warning when created with 0-length vectors
 - HSX file reads should respect input geometry arguments
 - enabled slicing in matrix assignments, #650
-- changed `Shape.volume()` to `Shape.volume` 
+- changed `Shape.volume()` to `Shape.volume`
 - growth direction for zigzag heteroribbons
 - `BandStructure` points can now automatically add the `nsc == 1` axis as would
   be done for assigning matrix elements (it fills with 0's).

docs/visualization/viz_module/index.rst

@@ -9,7 +9,7 @@ with your results can be as fast as possible.
 The plots that you can generate with it are **not bound to a specific visualization framework**. Instead, the users
 can choose the one that they want based on their taste or on what is available in their environment. Currently,
 there is support for visualizing the plots with `plotly`_, `matplotlib`_, `blender <https://www.blender.org/>`_. The flexibility of the framework
-allows for the user to **extend the visualizing options** quite simply without modifying ``sisl``'s internal code.   
+allows for the user to **extend the visualizing options** quite simply without modifying ``sisl``'s internal code.
 
 The framework started as a GUI, but then evolved to make it usable by ``sisl`` users directly. Therefore,
 it can serve as a very robust (highly tested) and featureful **backend to integrate visualizations into graphical interfaces**.
@@ -37,6 +37,7 @@ The following notebooks will help you develop a deeper understanding of what eac
     showcase/GeometryPlot.ipynb
     showcase/SitesPlot.ipynb
     showcase/GridPlot.ipynb
+    showcase/AtomicMatrixPlot.ipynb
     showcase/BandsPlot.ipynb
     showcase/FatbandsPlot.ipynb
     showcase/PdosPlot.ipynb