Graphing with Extrema

Versatility
Extrema can output a wide variety of graph types, including 2-D and 3-D line graphs, contour and density plots, surface plots, bar charts, histograms, and more.

Flexibility
Every detail of the output is under user control, including colors, fonts, point types, axis placement, tic size and angle, scales, line types, graph labels, size and placement of the graph, and more. Graphs can be overlaid and combined even when they have different scales and units. Acceptable defaults are provided automatically, so you don't have to think about the details until you need to.

Sophistication
Extrema has over 200 numeric and character functions, and over 30 operators, providing all of the operations of simple calculus, along with powerful curve fitting, filtering, and smoothing techniques.

Power
Extrema can handle data sets of unlimited size, can accurately fit to arbitrary functions with an unlimited number of free parameters, and can evaluate algebraic expressions of any complexity. For complex data analysis procedures, Extrema has its own easy-to-learn programming features, including conditional branching, looping, and subroutine calling constructs.