techaddressed/svg-chart-generator
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SVG chart generator for Tech Addressed benchmark results.
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Robert Partridge 95cf956ec1 Add schema files, update README, refine chart generation 
- Add schema/project.schema.json and schema/chart-data.schema.json
- Update README with all current fields and CLI usage
- Switch font to Roboto, tune font sizes and weights
- Add dynamic left margin via leftmargin in project.json
- Add charttitle, units, higherlower fields to project.json
- Fix margins with subplots_adjust
- Add value_labels support for DNR/DNF overrides
- Flip value label inside bar when within 5% of x_max
- Add CLI argument for project file path

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>
2026-03-30 16:53:57 -05:00
schema Add schema files, update README, refine chart generation 2026-03-30 16:53:57 -05:00
generate-charts.py Add schema files, update README, refine chart generation 2026-03-30 16:53:57 -05:00
LICENSE Initial commit 2026-03-30 14:50:02 +00:00
README.md Add schema files, update README, refine chart generation 2026-03-30 16:53:57 -05:00

README.md

SVG Chart Generator

Generates SVG benchmark charts for Tech Addressed articles. Uses matplotlib to produce horizontal bar charts, which are then finished in Inkscape using a custom template for headers and footers.

Dependencies

  • Python 3
  • matplotlib
  • numpy

Files

  • generate-charts.py — Main script. Reads a project file and generates one SVG per data file.
  • schema/project.schema.json — JSON schema for project configuration files.
  • schema/chart-data.schema.json — JSON schema for chart data files.

Usage

python3 generate-charts.py [project.json]

The script reads project.json from the current directory if no argument is provided, or from the path specified as the first argument.

python3 generate-charts.py ./my-project/project.json

Configuration

See schema/project.schema.json and schema/chart-data.schema.json for full schema definitions.

project.json

Field Description
prefix Output path prefix for generated SVG files
imgwidth Output image width in pixels
imgheight Output image height in pixels
imgdpi DPI for the output image. Use 72 for correct SVG pixel sizing in Inkscape.
leftmargin Left margin as a fraction of figure width (e.g. 0.16). Tune per project based on longest label.
charttitle Chart title for the Inkscape template header
units Units label for the template header (e.g. "MEASURED IN MiB/SEC")
higherlower Higher/lower is better label (e.g. "HIGHER IS BETTER")
data List of paths to chart data JSON files

Chart Data Files

Field Description
filename Output filename for the SVG
title Chart title. Leave empty — title is handled by the Inkscape template.
xlabel X-axis label. Leave empty — units are handled by the Inkscape template.
ylabel Y-axis label. Typically left empty.
xlim [min, max] range for the X-axis
vertline Interval between vertical grid lines. Also determines x-axis tick positions.
labels Bar labels (y-axis). Listed bottom-to-top — first item renders at the bottom.
values Bar values corresponding to each label. Use 0 for bars with no result.
colors Bar colors corresponding to each label. Accepts hex (e.g. "#808080") or named colors.
value_labels (optional) Override labels for bar values. Use null to show the numeric value, or a string like "DNR" or "DNF" to override.