TFunctionParser and TComplexParser are invisible DELPHI component for evaluating mathematical functions.
The function term is a user given string like sin(x)*x.
The function term can be changed during runtime.
These are the features of the latest version (TFunctionParser 6.x / TComplexParser 3.x). Older versions may differ.
TFunctionParser TComplexParser
Algebraic syntax, not case sensitive
Parentheses ()
Floating point numbers (extended) Complex floating point numbers
Angles in radians, degrees or gons Angles in radians
Userdefined variable names (default: x, y, z and t)
Implemented mathematical constants e, pi, C, TRUE, FALSE and NaN Implemented mathematical constants i, e, pi, C
Userdefined constants that may be expressions themselves Userdefined constants (only real xor imaginary numbers)
Almost 90 predefined mathematical functions and operations More than 30 complex mathematical functions and operations
Userdefined functions based on the predefined ones (macros): handle nested constructions like g(h(x+pi)/2)
Userfunctions: YOUR own code is evaluated
Easy to use