A data-analysis, graphing and drawing program for
scientists and engineers. The data-analysis functions
include: numerical filtering, differentiation and
integration; matrix operations; numerical solutions of
nonlinear or differential equations; optimization for
arbitrary formulas; time series analysis; wavelet
analysis; and many statistics. The graphs (line,
scatter, area, bar, stacked bar, pie, radar, polar,
bubble, image, contour and table) support X and/or Y
error bars, axis breaks, and curve fittings (nonlinear
least squares or maximum likelihood fitting for
arbitrary functions, polynomial, B-spline fittings,
and smoothing spline, local polynomial and wavelet
regressions). It also has drawing tools for making
schemes for presentation.

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