Hello,
I am new to R and have a couple of questions. My data set contains the
variables "Bwt" and "Hwt", which are bodyweight and heartweight, respectively,
of a group of cats.
With the following code, I am making two plots, both to be viewed in the same
plot window in R:
library(MASS)
maleData <- subset(cats, Sex == "M")
linreg0 <- lm(maleData$Hwt ~ maleData$Bwt)
par(mfrow=c(1,2))
plot(maleData$Hwt ~ maleData$Bwt)
plot(rstandard(linreg0) ~ fitted(linreg0))
My problem is that the two plots end up all oblong and squashed, because the
plot window doesn't have a size suited for having two plots next to one
another. Can I tell R to adjust the plot window?
Also, I would like to do something along the lines of:
newData <- data.frame(Bwt = 3.5)
predict(linreg0,newData,interval="p")
This doesn't work - my guess is that to R, "Bwt" is not a variable in maleData,
but maleData$Bwt is. I could use an attach command, but is it possible to get
this to work without doing so?
Kind regards,
Rasmus Hedegaard.
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