FUNCTION

Syntax

FUNCTION { hints, symbol, symbol|exlist }

Implemented in iMath since version 2.2.0 or earlier.

Explanation

Declare a user-defined function. The second parameter is the name of the function. The the third parameter declares the arguments of the function and can be either a single symbol or a list of symbols.

The way that iMath treats this function can be influenced by function hints:

• none: No function hints. Must be used because iMath requires three arguments to the FUNCTION declaration.
• lib: A library function. It will not be affected by CLEAREQUATIONS.
• trig: For trigonometric functions. Tells iMath that this function will get special treatment when printing (e.g. sin²x instead of (sinx)²) .
• expand: The function is to be expanded immediately. Useful for functions that are abbreviations, e.g. square(x) will be expanded to x^2 whenever it is used.
• nobracket: The function does not require brackets around the argument (e.g. sqrt(x) is printed as <math>root x</math>).
• defdiff: Differentiate the definition of the function, not the function itself (e.g. sin(x) will be differentiated to cos(x) and not to (sin(x))'.

Example

FUNCTION {none, f, x} declares the function f with one argument.

See also

FUNCDEF