Points

The use of this tool is exemplified in  Dots.

The configuration panel of POINTS may have as many lines as desired. Each line defines a point and looks like this:

[u,0]'u='+u:size=3:colour=magenta

The configuration of a point is a chain of expressions separated by : which determine several properties of the point.

The configuration line of a point starts with the coordinates of its initial location in square brackets, for example [-3.2,2.5]. The initial coordinates may be expressions. Next comes a chain of strings, flanked by single quotes ' , and numbers or numerical expressions separated from each other by a + sign (see the documentation of TEXTS for a detailed description of this feature). This chain of strings and numbers is written on the screen starting near the point. Another feature that may appear in the configuration line of a point is the expression size=3 which defines the radius of the circle signaling the position of the point (in this case the radius would be 3 pixels). An expression colour=magenta, defining the colour of the point's circle (in this case magenta) may also be present. By default the radius is 2 and the colour is blue.

The following example shows a point  P with coordinates [u,v] that moves when the user changes the values of the parameters u and v. There are two more points in the applet, with names u and v, that show the values of the correspondig coordinates of P.

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	Ministerio de Educación, Cultura y Deporte. Aņo 2000