Can I ask please:
Using ols in lm. I found "surprise", when x is vector (mean is 0) and y is vector of 1 1 1 ...or vector of 0 0 0...(constant)
When "forcing" lm without intercept (y~x-1), i get model where residuals "dont oscilate around 1". When I did calculate coefficient manualy and its exactly same. Example in r:
x=c(-0.0021,0.0042,0.0047,0.0083-0.0001,0.0010,0.0038,0.0034,0.0034,0.0066,0.0056,0.0043,0.0082-0.0129-0.0094,0.0048,0.0050-0.0133)
y=rep(1,14)
m=lm(y~x-1)
plot(m$fitted)
plot(x*47.74)
(Can I ask, whats wrong when y="constant vector" in ols ? :-)
Thanks alot
