Examples¶

All example scripts are in the examples/ directory and can be run headlessly:

MPLBACKEND=Agg uv run python examples/<script>.py

Climate stripes¶

examples/climate_stripes.py

Warming-stripes visualisation for Nordrhein-Westfalen using the official DWD area-averaged annual mean temperature (1881–2025, 145 years, no gaps). Cold years in RWTH blue (#00549F), warm years in RWTH red (#CC071E), opacity proportional to the magnitude of the anomaly relative to the 1961–1990 baseline (~8.96 °C).

The script downloads the data automatically from the DWD Climate Data Center open-data server at runtime; no local data file is needed.

Climate stripes

Inspired by Ed Hawkins, University of Reading. Data: DWD Climate Data Center.

New features demo¶

examples/new_features_demo.py

Walkthrough of all v3.1 features:

plot_color_palette() — 13 × 5 RWTH tint grid
New colormaps: viridis_RWTH, thermal_RWTH, divergent_bm_RWTH, divergent_gy_RWTH
pick_colors(n) — greedy farthest-point colour selection
check_accessibility() — CVD simulation and delta-E report
Size and journal style modifiers
save_figure() multi-format export
misc.colorblind CVD-safe cycle

Power-systems demo¶

examples/power_systems_demo.py

Power-system colormaps demonstrated on realistic scenarios:

Figure	Colormap	Use case
2D bus voltage grid	`voltage_RWTH`	Voltage magnitude deviations (pu)
Line loading bar chart	`loading_RWTH`	Thermal loading 0–100 %+
Colormap strips	both	Side-by-side overview

# Example: voltage map with symmetric normalisation
import matplotlib.colors as mcolors
from rwthplots.cmap import rwth_cmap

norm = mcolors.TwoSlopeNorm(vcenter=1.0, vmin=0.88, vmax=1.12)
ax.imshow(voltages, cmap=rwth_cmap("voltage_RWTH"), norm=norm)

Palette and colour examples¶

examples/colours_example.py — plot_color_palette() and colour set demo.

examples/cmaps_example.py — renders gradient and line-plot previews for every registered colormap into examples/figures/cmaps/.