Data Analysis and Visualisation Software

EXTREMA is a high level, interactive programming environment with user friendly graphics and sophisticated mathematical analysis capabilities. Over `200` numeric and character functions are provided, as well as over `30` operators, providing all of the operations of simple calculus, along with powerful curve fitting, filtering and smoothing techniques, and employing a dynamic array management scheme allowing arrays limited in size only by system resources. Algebraic expressions of arbitrary complexity are evaluated using a lexical scanner approach. Line graphs, histograms and pie charts, as well as contour, density and surface plots are available. The user interface is a command language with a simple to use and easy to learn syntax, incorporating basic elements of a structured programming language including conditional branching, looping and subroutine calling constructs.