Displaying 2 results from an estimated 2 matches for "ech2".
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2007 Sep 21
1
Stats 101 : lm with/without intercept
I am puzzled at the use of regression. I have a categorical variable
ClassePop33000 which factors a Population variable into 3 levels. I want to
investigate whether that categorical variable has some relation with my
dependent variable, so I go :
lm(Cout.ton ~ ClassePop33000, data=ech2)
Call:
lm(formula = Cout.ton ~ ClassePop33000, data = ech2)
Residuals:
Min 1Q Median 3Q Max
-182.24 -62.91 -22.76 66.38 277.39
Coefficients:
Estimate Std. Error t value Pr(>|t|)
(Intercept) 231.66 1...
2007 Sep 27
1
Cairo on windows
...ortion of the Cairo device that is covered by the R command
window does not get drawn. I noticed changing the size of the Cairo window
by dragging one of its corners with the mouse does refresh the whole window
sometimes
- a simple plot or qplot command works, e.g. qplot(x=kg.hab,y=Cout.ton,
data=ech2). When one starts to add xlab, ylab and main then things start
getting shaky to the point the display becomes blank. At that point, even
reverting back to a simple plotting command that worked 5 seconds ago won't
bring back the display. One has to dev.off() and start again.
Besides the inte...