Making the plot window wider and using the predict function
Hi
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)
The second question is answered by: linreg0 <- lm(Hwt ~ Bwt, data=maleData) after that your predict code works.
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?
Can you use mouse for resizing? Regards Petr
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. [[alternative HTML version deleted]]
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