Difference between revisions of "Function Command"
From GeoGebra Manual
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;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. | ;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|1= | {{example|1= | ||
− | <code>Function[{2, 4, 0, 1, 0, 1, 0}]</code> yields a triangular | + | <code>Function[{2, 4, 0, 1, 0, 1, 0}]</code> yields a triangular wave between ''x=2'' and ''x=4''. |
<code>Function[{-3, 3, 0, 1, 2, 3, 4, 5}]</code> yields a linear equation with slope ''=1'' between ''x=-3'' and ''x=3''. | <code>Function[{-3, 3, 0, 1, 2, 3, 4, 5}]</code> yields a linear equation with slope ''=1'' between ''x=-3'' and ''x=3''. | ||
− | + | }} |
Revision as of 15:05, 9 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, 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, whileg(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.