Difference between revisions of "SetValue Command"
From GeoGebra Manual
(;SetValue( <Dependent Object>, ? ) :This is a special syntax that will set a dependent object to undefined without needing to fully redefine it using <code>=</code>.) |
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;SetValue( <Object>, <Object> ) | ;SetValue( <Object>, <Object> ) | ||
− | :Let''A'' be the first and ''B'' the second object. If ''A'' is a [[Free, Dependent and Auxiliary Objects|free object]] or a [[Points and Vectors|Point]] restricted to [[Geometric Objects#Paths|Path or Region]], its value is set to current value of ''B'' (i.e. ''A'' doesn't change value if ''B'' is changed afterwards). | + | :Let ''A'' be the first and ''B'' the second object. If ''A'' is a [[Free, Dependent and Auxiliary Objects|free object]] or a [[Points and Vectors|Point]] restricted to [[Geometric Objects#Paths|Path or Region]], its value is set to current value of ''B'' (i.e. ''A'' doesn't change value if ''B'' is changed afterwards). |
:{{example|1=If ''f'' is a function, <code>SetValue(f, RandomElement({cos(x), 3x+2, ln(x)}))</code> defines, at random, f as being one of the functions proposed in the list.}} | :{{example|1=If ''f'' is a function, <code>SetValue(f, RandomElement({cos(x), 3x+2, ln(x)}))</code> defines, at random, f as being one of the functions proposed in the list.}} | ||
Latest revision as of 10:50, 15 December 2022
- SetValue( <Boolean>, <0|1> )
- Sets the state of a boolean / check box : 1 = true, 0 = false
- Example: If b is a boolean,
SetValue(b,1)
sets the boolean b as true.
- SetValue( <Object>, <Object> )
- Let A be the first and B the second object. If A is a free object or a Point restricted to Path or Region, its value is set to current value of B (i.e. A doesn't change value if B is changed afterwards).
- Example: If f is a function,
SetValue(f, RandomElement({cos(x), 3x+2, ln(x)}))
defines, at random, f as being one of the functions proposed in the list.
- SetValue( <List>, <Number>, <Object> )
- Let n be the <Number>. The command SetValue sets the n-th element of a free list to the current value of the object. Number n can be at most 1 + length of L.
- SetValue( <Dependent Object>, ? )
- This is a special syntax that will set a dependent object to undefined without needing to fully redefine it using
=
.
- SetValue( <drop-down list>, <Number n > )
- Set n as the index of the selected element in the drop-down list.
Comments
SetValue in scripting[edit]
If you want to change value of an object in Scripting, always use SetValue rather than =. See Responsive Applets for more information.