A high-performance C/C++ library and command-line suite for device-independent 2D vector graphics and data plotting.
GNU Plotutils is a highly stable, performance-optimized package for 2D vector graphics and data visualization, maintained as part of the GNU Project. At its core is 'libplot', a powerful C/C++ function library providing a unified interface for exporting graphics to diverse formats including SVG, PNG, EPS, and CGM, or rendering directly to X11 displays. In the 2026 landscape, while high-level AI-driven charting tools dominate the enterprise layer, GNU Plotutils remains a critical infrastructure component for embedded systems, high-speed batch processing, and scientific research requiring deterministic, low-overhead plotting. The package includes the 'graph' utility for generating XY plots from raw data, 'plot' for translating meta-files, and 'pic2plot' for rendering PIC language diagrams. Its technical architecture is designed for portability and integration into larger software suites, making it a preferred choice for developers who require fine-grained control over geometric primitives and spline-based curve fitting without the memory overhead of modern JavaScript or Python visualization stacks. It excels in environments where real-time simulation data must be visualized with minimal latency.
Uses a virtual coordinate system that maps primitives (lines, arcs, circles) to specific hardware or file drivers at runtime.
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Built-in algorithms for Akima splines and tension splines to create smooth curves from discrete data points.
Includes 'tek2plot' and 'hp2plot' for legacy vector format conversion.
Supports the complete set of Hershey vector fonts for high-quality labeling in vector outputs.
Provides smooth real-time animation capabilities for live data streams on Unix-based displays.
The 'pic2plot' utility interprets the PIC graphics language for procedural diagram generation.
Granular control over line widths, dash patterns, and fill styles via command-line flags.
Generating thousands of charts daily without the overhead of a heavy GUI or cloud API costs.
Registry Updated:2/7/2026
Visualizing high-frequency physics simulation data as it is computed.
Modernizing data stored in obsolete HP-GL plotter formats.