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rhof
2004 Feb 19
1
Comparing two regression slopes
I would suggest the method of Sokal and Rholf (1995) S. 498, using the F
test.
Below I repeat the analysis by Spencer Graves:
Spencer:
> df1 <- data.frame(x=1:3, y=1:3+rnorm(3))
> df2 <- data.frame(x=1:3, y=1:3+rnorm(3))
> fit1 <- lm(y~x, df1)
> s1 <- summary(fit1)$coefficients
> fit2 <- lm(y~x, df2)
>...
2009 Sep 06
3
Video Analysis?
What software exists for digitizing video to quantify the motion
of specific features in the image? I might be willing to use something
that's NOT in R, though I'd prefer something in R (or at least with an R
intereface).
Thanks,
Spencer Graves