Difference between revisions of "Vertex Command"

Revision as of 11:19, 26 September 2012

Following text is about a feature that is supported only in GeoGebra 4.2.

Vertex[ <Inequality> ]

Returns the points of intersection of the borders

Example:

Vertex[(x + y < 3) && (x - y > 1)] returns point (2,1) ;

Vertex[(x + y < 3) ∧ (x - y > 1)&& (y>-2)]} returns list {(2, 1), (5, -2), (-1, -2)}

Vertex[(y > x²) ∧ (y < x)]} returns list {(0, 0), (1, 1)}.

Note: To get vertices of the polygon / conic as list, use {Vertex[t]}.

@@ Line 7: / Line 7: @@
 :{{example|1=<div>
 ::<code>Vertex[(x + y < 3) && (x - y > 1)]</code> returns point (2,1) ;
-::<code> {Vertex[(x + y < 3) ∧ (x - y > 1)&& (y>-2)]}</code> returns list <nowiki> {(2, 1), (5, -2), (-1, -2)} </nowiki>
+::<code>Vertex[(x + y < 3) ∧ (x - y > 1)&& (y>-2)]}</code> returns list <nowiki> {(2, 1), (5, -2), (-1, -2)} </nowiki>
-::<code>{Vertex[(y > x²) ∧ (y < x)]}</code>  returns list <nowiki>  {(0, 0), (1, 1)}.  </nowiki></div>}}}}
+::<code>Vertex[(y > x²) ∧ (y < x)]}</code>  returns list <nowiki>  {(0, 0), (1, 1)}.  </nowiki></div>}}}}
 ; Vertex[Polygon]: Returns (all) vertices of the polygon.