Hi Everyone,
I want to make 3 lines on the same graph (not as subplots, all in the same
window, one on top of each other) and I want them to be quantile-quantile
plots (qqplot). Essentially, I am looking for the equivalent of Matlab's
"hold on" command to use with qqplot. I know I can use 'points' or 'lines',
but these do not give me a qqplot (only appear to work as scatter plots). I
found the syntax 'par(new=TRUE)' but that only seems to work for two lines,
not for three.
My script currently looks like:
qqplot(nq.n5,tq.n5,col="red",xlab="Normal Distribution Quantiles",ylab="t
Distribution Quantiles",main="Quantile-Quantile Plot of Normal vs
t-Distribution for Various Sample Sizes",pch=20)
par(new=TRUE)
qqplot(nq.n50,tq.n50,col="blue",xlab="",ylab="",pch=20).
par(new=TRUE)
qqplot(nq.n500,tq.n500,col="green",xlab="",ylab="",pch=20)
legend("topleft",c("n=5","n=50","n=500"),fill=c("red","blue","green"))
I realize that this only plots the first and the third qqplot because by
doing par(new=TRUE) again, it gets rid of the middle one. I don't know how
to get around this and get all 3 lines on the same plot.
Can anyone please help me with this syntax?
Thank you very much for your time and advice!
Cheers,
Melissa
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making multiple lines using qqplot
2 messages · Melrose2012, ilai
Melissa, par(new=T) works as many times as you use it. You don't provide data, but (assuming it is not NULL) more likely your n=500 qqplot was just obscuring the points of the n=50 plot. Reverse the order (i.e. qqplot 500 first, 50, 5 last) and see if all three are there (as there are more 500 you should still see green on the extremes). Second, you say you want "lines" but used pch=20. replace with type='l' to get lines (may also help with your main problem). If you want to stick with points and your device supports it, you can consider semi-transparent colors. Cheers On Thu, Feb 9, 2012 at 9:00 PM, Melrose2012
<melissa.patrician at stonybrook.edu> wrote:
Hi Everyone,
I want to make 3 lines on the same graph (not as subplots, all in the same
window, one on top of each other) and I want them to be quantile-quantile
plots (qqplot). ?Essentially, I am looking for the equivalent of Matlab's
"hold on" command to use with qqplot. ?I know I can use 'points' or 'lines',
but these do not give me a qqplot (only appear to work as scatter plots). ?I
found the syntax 'par(new=TRUE)' but that only seems to work for two lines,
not for three.
My script currently looks like:
qqplot(nq.n5,tq.n5,col="red",xlab="Normal Distribution Quantiles",ylab="t
Distribution Quantiles",main="Quantile-Quantile Plot of Normal vs
t-Distribution for Various Sample Sizes",pch=20)
par(new=TRUE)
qqplot(nq.n50,tq.n50,col="blue",xlab="",ylab="",pch=20).
par(new=TRUE)
qqplot(nq.n500,tq.n500,col="green",xlab="",ylab="",pch=20)
legend("topleft",c("n=5","n=50","n=500"),fill=c("red","blue","green"))
I realize that this only plots the first and the third qqplot because by
doing par(new=TRUE) again, it gets rid of the middle one. ?I don't know how
to get around this and get all 3 lines on the same plot.
Can anyone please help me with this syntax?
Thank you very much for your time and advice!
Cheers,
Melissa
--
View this message in context: http://r.789695.n4.nabble.com/making-multiple-lines-using-qqplot-tp4375273p4375273.html
Sent from the R help mailing list archive at Nabble.com.
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