# Difference between revisions of "Function Command" Jump to: navigation, search

##### Function

This article is about GeoGebra command.

##### Command Categories (All commands)

Function[Function f, Number a, Number b]
Yields a function graph, that is equal to f on the interval [a, b] and not defined outside of [a, b].
Note:
This command should be used only to restrict the display interval of a function. To restrict the function’s domain, create a conditional function using the If command, e.g.
`f(x) = If[-1 < x < 1, x²]`.
Example: `f(x) = Function[x^2, -1, 1]` produces a function equal to x2 whose graph appears only in the interval [-1, 1]. However, while `g(x) = 2 f(x)` will produce the function g(x) = 2 x2 as expected, this function is not restricted to the interval [-1, 1].
Note: This command does not work with Tools / Macros. Use the If command as above.

{{betamanual|version=4.2|

Function[<List of Numbers>]
Yields the following function: The first two numbers determine the start x-value and the end x-value. The rest of the numbers are the y-values of the function in between in equal distances.
Example: `Function[{2, 4, 0, 1, 0, 1, 0}]` yields a triangular wave between x=2 and x=4. `Function[{-3, 3, 0, 1, 2, 3, 4, 5}]` yields a linear equation with slope =1 between x=-3 and x=3.
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