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devd
2010 Sep 29
1
Understanding linear contrasts in Anova using R
...of (coeff times means) i.e. 0 (intercept),
.0425, 7.989, .3483, -6.66
# and these are not a linear (or other nice pretty) function of est. from R.
# Just as a check, I forced intercept through zero with with deviation
scores or -1 in model.
# Now force intercept to 0 by using deviation scores
devdv <- dv-mean(dv)
model5 <- lm(devdv~order.group)
summary(model5)
#Same as above except intercept = 0
# Now do it by removing the intercept
model6 <- lm(dv~order.group -1)
summary(model6)
# Weird because coeff = cell means
# Estimate Std. Error t value Pr(>|t|)
# orde...