Graph Plotter

GP is aimed to be simple and fast tool to analyse numerical data. It does not
claim to replace all other plotters. The main platforms are GNU/Linux and
Windows. GP can be embedded to any third-party SDL based application.

Features

• Plot 2D figures with lines or dots from plain text or binary files.
• Spatial structure based rendering to look through a large datasets.
• Multiple axes are supported by design.
• Real-time plotting from multiple asynchronous sources.
• Math operations like subtraction or polynomial fitting.
• Data sample tool to extract accurate numeric values.
• Static (from file) and dynamic (from UI) configuration.
• Export screen or data to the file (PNG, SVG, CSV).
• In-RAM data compression by LZ4.

Screenshots

Build

These dependencies you need to have prior to compile GP from sources.

• SDL2
• SDL2_ttf
• SDL2_image
• FreeType

To compile GP you could use Makefile from source directory.

Usage

You can just use GP to view a plain text file or CSV table.

$ gp file.txt file.csv ...

Note that first valid line of plain text (or CSV) file will be interpreted as
description of the columns. Here is a simple example of the plain text file.

$ cat file.txt
time@sec  current@A  voltage@V  hexvar  ...
0.1       0.0        0.0        0x0001
0.2       1.1        2.1        0x0035
0.3       1.5        3.4        0x0d1f
0.4       1.7        4.1        0x0e00
...

You also can open a multiple files to combine various columns from different
files in a single plot. Explore UI menu options to overview of all features.

Also check for command line options help.

$ gp -h

Example of pipeline usage with GP.

$ zcat config/tlmgrab.csv.gz | gp -x0 -l1 -t10 - -p3 -n4

Сonfiguration

Take a look into configuration examples that describes most of the options.

• global.gp
• loadbin.gp
• loadcsv.gp
• subtract.gp

You can make real-time plot from raw serial device or from growing logfile.

• serial.gp

TODO

• Improve embedded API.
• Add a dependency based subtract calculation.
• Optimize line drawing performance even more.