[R] very beginner's question
Begging the list's indulgence, an extremely dumb beginner's question. I've got 24 months' worth of numbers - ranging from 2 events per month, to 66 events per month. I want to take a stab at making a reasonable guess as to what the next year's data would be, approximately, i.e., based on the 24 months I've got, I want to be able to tell someone: the 12 months after this will probably average about $number of events per month. Assuming I'm able to navigate R with a minimum degree of proficiency, where would I start with this? As you can doubtless tell, I'm not looking for anything sophisticated - just a reasonable estimate. Am I going to be able to do better than a projected per-month guess based on $total/$number_of_months? Thanks very much - _ Hotmail: Trusted email with powerful SPAM protection. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] very beginner's question
See ?ets in the forecast package. On Sun, Dec 27, 2009 at 2:51 PM, Facetious Nickname facetious_nickn...@hotmail.com wrote: Begging the list's indulgence, an extremely dumb beginner's question. I've got 24 months' worth of numbers - ranging from 2 events per month, to 66 events per month. I want to take a stab at making a reasonable guess as to what the next year's data would be, approximately, i.e., based on the 24 months I've got, I want to be able to tell someone: the 12 months after this will probably average about $number of events per month. Assuming I'm able to navigate R with a minimum degree of proficiency, where would I start with this? As you can doubtless tell, I'm not looking for anything sophisticated - just a reasonable estimate. Am I going to be able to do better than a projected per-month guess based on $total/$number_of_months? Thanks very much - _ Hotmail: Trusted email with powerful SPAM protection. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] A beginner's question about ggplot
Dear R-users, I would have another question about the ggplot() function in the ggplot2 package. All the examples I've read so far in the documentation make use of a single neatly formatted data.frame. However, sometimes, one may be interested in plotting on the same grid information or objects derived from two totally different datasets and customize both displays. I still cannot tell how this can be done using ggplot(). Here's an example. ### ## A very simple data.frame; my.data = data.frame(X1 = as.factor(rep(1:2,c(4,4))),X2=c(4,3,5,2,6,2,3,5),X3=c(1:3,2,2:4,5)) ; ## Let's say I want to add the X^2 line to the plot; squared = data.frame(X=1:12,Y=((1:12)/2)^2) ; ## A scatterplot for my.data ; p = ggplot(my.data,aes(x=X2,y=X3,group=X1)) ; p = p+geom_point(aes(colour=X1)) ; # How can squared be added to the plot? At first, I used p+geom_line(data=squared,aes(x=X,y=Y,group=1,colour=green)) ; but the plotted line is always blue! In fact, I can replace colour by any character value and I will still get a blue line. Although I may be wrong, I think this is pretty straightforward. Can anyone give me a pointer as to how we can add arbitrary curves to a ggplot graph and then customize them? A bit later, I'll have to overlay histograms derived from totally different datasets and, if possible, I'd like to use the ggplot2 library for that too, hence the importance of understanding how ggplot objects can be mixed. Thanks a lot, Luc -- View this message in context: http://www.nabble.com/A-beginner%27s-question-about-ggplot-tp23336793p23336793.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] A beginner's question about ggplot
On Fri, May 1, 2009 at 12:22 PM, MUHC-Research villa...@dms.umontreal.ca wrote: Dear R-users, I would have another question about the ggplot() function in the ggplot2 package. All the examples I've read so far in the documentation make use of a single neatly formatted data.frame. However, sometimes, one may be interested in plotting on the same grid information or objects derived from two totally different datasets and customize both displays. I still cannot tell how this can be done using ggplot(). Here's an example. ### ## A very simple data.frame; my.data = data.frame(X1 = as.factor(rep(1:2,c(4,4))),X2=c(4,3,5,2,6,2,3,5),X3=c(1:3,2,2:4,5)) ; ## Let's say I want to add the X^2 line to the plot; squared = data.frame(X=1:12,Y=((1:12)/2)^2) ; ## A scatterplot for my.data ; p = ggplot(my.data,aes(x=X2,y=X3,group=X1)) ; p = p+geom_point(aes(colour=X1)) ; # How can squared be added to the plot? At first, I used p+geom_line(data=squared,aes(x=X,y=Y,group=1,colour=green)) ; but the plotted line is always blue! In fact, I can replace colour by any character value and I will still get a blue line. You have two alternatives: p + geom_line(data=squared,aes(x=X,y=Y,group=1,colour=squared)) + labs(colour = Dataset) p + geom_line(data=squared,aes(x=X,y=Y,group=1), colour=green) see section 4.5.2 of the book for details. Hadley -- http://had.co.nz/ __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] A beginner's question
I am a new R-language user. I have set up a data frame mydata,one of the colume of which is skill. Now I want to select the observations whose skill value is equal to 1,by what command can I get it? __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] A beginner's question
Here's an example: mydata-data.frame(skill=c(1,2,3,4),x=c(1,1,1,1)) mydata[mydata$skill==1,] On Fri, Mar 27, 2009 at 16:40, minben minb...@gmail.com wrote: I am a new R-language user. I have set up a data frame mydata,one of the colume of which is skill. Now I want to select the observations whose skill value is equal to 1,by what command can I get it? __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] A beginner's question
Hi, minben wrote: I am a new R-language user. I have set up a data frame mydata,one of the colume of which is skill. Now I want to select the observations whose skill value is equal to 1,by what command can I get it? Try this: mydata1-mydatasubset(mydata, skill==1) Maybe You should also read this introduction: http://cran.r-project.org/doc/manuals/R-intro.pdf Kind regards, Kimmo __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] A beginner's question
You can do like this: 1. mydata[mydata$skill==1,] 2. mydata[mydata[,skill]==1,] /Forin On Thu, 26 Mar 2009 23:40:32 -0700 (PDT) minben minb...@gmail.com wrote: I am a new R-language user. I have set up a data frame mydata,one of the colume of which is skill. Now I want to select the observations whose skill value is equal to 1,by what command can I get it? __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Florin G. Maican == Ph.D. candidate, Department of Economics, School of Business, Economics and Law, Gothenburg University, Sweden --- P.O. Box 640 SE-405 30, Gothenburg, Sweden Mobil: +46 76 235 3039 Phone: +46 31 786 4866 Fax:+46 31 786 4154 Home Page: http://maicanfg.googlepages.com/index.html E-mail: florin.mai...@handels.gu.se Not everything that counts can be counted, and not everything that can be counted counts. --- Einstein --- __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] A beginner's question
minben schreef: I am a new R-language user. I have set up a data frame mydata,one of the colume of which is skill. Now I want to select the observations whose skill value is equal to 1,by what command can I get it? __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. To add the number of possibilities :): subset(mydata, skill == 1) cheers, Paul -- Drs. Paul Hiemstra Department of Physical Geography Faculty of Geosciences University of Utrecht Heidelberglaan 2 P.O. Box 80.115 3508 TC Utrecht Phone: +3130 274 3113 Mon-Tue Phone: +3130 253 5773 Wed-Fri http://intamap.geo.uu.nl/~paul __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
