Open Source SigmaPlot Alternatives
SymPy is a Python library for symbolic computation. The stated goals of the library are to become a full-featured computer algebra system and to keep a simple code base to promote extensibility and comprehensibility.
- - SymPy is the most popular Open Source & free alternative to SigmaPlot.
Opinions about SymPy as a Alternative to SigmaPlot
NumeRe, the cutting-edge open source software, is your ultimate solution for scientific data analysis. Built on a versatile approach, it seamlessly combines powerful statistical and numeric capabilities, optimized specifically for scientific applications.
Grace is a free WYSIWYG 2D graph plotting tool, for Unix-like operating systems. The package name stands for "GRaphing, Advanced Computation and Exploration of data." Grace uses the X Window System and Motif for its GUI.