Area function
Syntax: |
a = AREA(x,y)
|
The AREA
function calculates the area
enclosed in the polygon specified by the vertex coordinates given in the vector
arguments x
and y
. Both vector arguments must be of the
same length. The polygon need not be closed, that is, the last point will be
assumed to connect to the first point.
Example
The following code produces the picture below.
GENERATE THETA 0 .25 360
R[1:LEN(THETA)] = 1
SET AUTOSCALE COMMENSURATE
GRAPH R*COSD(THETA) R*SIND(THETA)
PIC = AREA(R*COSD(THETA),R*SIND(THETA))
SET TEXTALIGN 2
SET %XTEXTLOCATION 50
SET %YTEXTLOCATION 90
SET TEXTINTERACTIVE 0
TEXT 'Calculated