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* README.org: Advertise python code.
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+This repository is the source code accompanying the following papers.
+- [An O(n) algorithm for generating uniform random vectors in n-dimensional cones](https://arxiv.org/abs/2101.00936)
+- [An algorithm for estimating volumes and other integrals in n dimensions](https://arxiv.org/abs/2007.06808)
+  
+However, most of the code for [An O(n) algorithm for generating
+uniform random vectors in n-dimensional
+cones](https://arxiv.org/abs/2101.00936) has been released as a
+separate library—sambal. See [PyPI
+page](https://pypi.org/project/sambal/) and
+[source](https://git.systemreboot.net/sambal).
+
+# Dependencies
+
+The code depends on the following dependencies. Please install them
+before running the scripts. A python virtual environment may be an
+easy way to do this.
+
+- Python 3
+- matplotlib
+- numpy
+- scipy
+- sambal
+
+# Run
+
+The core functions are in `nsmc.py`. The experiments are in the
+scripts `distribution-volumes.py`, `distribution-integrals.py` and
+`spheroid.py`. Run those scripts as
+```
+$ python3 distribution-volumes.py
+$ python3 distribution-integrals.py
+$ python3 spheroid.py
+```
+Plots of the number of samples versus the dimension get written to the
+current directory. Play around with the number of trials, dimensions,
+and relative error tolerances in the scripts.