
SLOPEName:
<SUBSET/EXCEPT/FOR qualification> where <x1> is a variable or a parameter containing the x coordinates of the first point; <y1> is a variable or a parameter containing the y coordinates of the first point; <x2> is a variable or a parameter containing the x coordinates of the second point; <y2> is a variable or a parameter containing the y coordinates of the second point; <y> is a variable or a parameter (depending on what the input arguments are) where the computed slope values are stored; and where the <SUBSET/EXCEPT/FOR qualification> is optional.
LET A = SLOPE(X1,Y1,X2,Y2)
skip 25 read convhull.dat x y . let y2 x2 = 2d convex hull y x let xtemp = x2(1) let ytemp = y2(1) let y2 = combine y2 ytemp let x2 = combine x2 xtemp let x3 = x2 let y3 = y2 let n = size y2 let nm1 = n  1 retain x2 y2 for i = 1 1 nm1 retain x3 y3 for i = 2 1 n let slope = slope(x2,y2,x3,y3) . set write decimals 4 print x2 y2 x3 y3 slopeThe following output is generated  X2 Y2 X3 Y3 SLOPE  0.0000 2.0000 1.0000 1.7300 0.2700 1.0000 1.7300 1.7300 1.0000 1.0000 1.7300 1.0000 2.0000 0.0000 3.7037 2.0000 0.0000 1.7300 1.0000 3.7037 1.7300 1.0000 1.0000 1.7300 1.0000 1.0000 1.7300 0.0000 2.0000 0.2700 0.0000 2.0000 1.0000 1.7300 0.2700 1.0000 1.7300 1.7300 1.0000 1.0000 1.7300 1.0000 2.0000 0.0000 3.7037 2.0000 0.0000 1.7300 1.0000 3.7037 1.7300 1.0000 1.0000 1.7300 1.0000 1.0000 1.7300 0.0000 2.0000 0.2700
Date created: 01/23/2013 