Difference between revisions of "Function Command"

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{{Note|1=From GeoGebra 4.2, Function[ <List of Numbers> ] has been added for use by the Freehand Tool. The first two numbers are the start and end of the function and the rest of the numbers are the heights. For example Function[{2, 4, 0, 1, 0, 1, 0}] makes a triangular function between x=2 and x=4}}
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{{Note|1=From GeoGebra 4.2, Function[ <List of Numbers> ] has been added for use by the Freehand Tool. The first two numbers are the start and end of the function and the rest of the numbers are the heights. For example <code>Function[{2, 4, 0, 1, 0, 1, 0}] </code> makes a triangular function between x=2 and x=4}}
 
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Revision as of 11:53, 5 July 2012


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 or use it with the Sequence command, create a conditional function with 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].
  • This command does not work with Tools / Macros. Use the If command as above.
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