> Anyone know of a VFP friendly Least Square Regression Routine? Free is
> good.
>
If you want the coefficients of a regression line :
CREATE CURSOR test (xi n(4),yi n(4))
INSERT INTO test VALUES (1,180)
INSERT INTO test VALUES (2,182)
INSERT INTO test VALUES (3,187)
INSERT INTO test VALUES (4,188)
***
SELECT ;
AVG(xi),;
AVG(yi),;
SUM( (xi-(select AVG(xi) FROM test as hihi))* (yi-(select AVG(yi) FROM
test as haha))),;
SUM((xi-(select AVG(xi) FROM test as hihi))**2) ;
FROM test ;
INTO ARRAY atest
ca = atest(3)/atest(4)
cb = atest(2) - ca*atest(1)
***
?"Y = ca.X + cb"
?"ca = ",ca
?"cb = ",cb
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