DemesDraw

demesdraw is a Python package that contains drawing functions for Demes demographic models, using matplotlib to create the figures. DemesDraw offers both a command line interface, and a Python API. Feedback is very welcome.

Installation

Install with pip:

$ python3 -m pip install demesdraw

Or with conda:

$ conda install -c conda-forge demesdraw

Example usage

Command line interface (CLI)

The CLI can be used to quickly plot a Demes YAML file. Any file format supported by matplotlib can be specified, but a vector format such as svg or pdf is recommended.

$ demesdraw tubes --log-time \
	examples/stdpopsim/HomSap__AmericanAdmixture_4B11.yaml \
	AmericanAdmixture_4B11_tubes.svg

Python API

Compared with the CLI, the Python API provides additional control. In the following example, the horizontal positions of the demes are chosen manually and the names of extinct demes are moved to a legend.

import demes
import demesdraw

graph = demes.load("examples/stdpopsim/HomSap__AmericanAdmixture_4B11.yaml")
w = demesdraw.utils.separation_heuristic(graph)
positions = dict(ancestral=0, AMH=0, AFR=0, OOA=1.5 * w, EAS=1 * w, EUR=2 * w, ADMIX=-w)
ax = demesdraw.tubes(graph, log_time=True, positions=positions, labels="xticks-legend")
ax.figure.savefig("AmericanAdmixture_4B11_tubes_custom.svg")

Documentation

Complete API and CLI details are available in the DemesDraw documentation.