[R] change plotting symbol for groups in trellis graph
Hi, how can I change the plotting symbol for the groups in a trellis panel dotplot. My graph is similar to: library(trellis) dotplot(variety ~ yield | site, data = barley, groups = year, key = simpleKey(levels(barley$year), space = right), xlab = Barley Yield (bushels/acre) , aspect=0.5, layout = c(1,6), ylab=NULL) I'd like to plot the different years with different symbols (eg. one with pch=19 the other with pch=21 or so). Thank you very much for your help. Tom __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] as.data.frame(cbind()) transforming numeric to factor?
Dear List, why does as.data.frame(cbind()) transform numeric variables to factors, once one of the other variablesused is a character vector? # x.1 - rnorm(10) x.2 - c(rep(Test,10)) Foo - as.data.frame(cbind(x.1)) is.factor(Foo$x.1) Foo - as.data.frame(cbind(x.1,x.2)) is.factor(Foo$x.1) # I assume there is a good reason for this, can somebody explain? Thanks. Best, Tom __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] as.data.frame(cbind()) transforming numeric to factor?
Thanks everybody. I recognize my mistake now. I think as.data.frame(cbind(x.1,x.2),stringsAsFactors = FALSE) would be a good idea. Tom On 8/18/06, Prof Brian Ripley [EMAIL PROTECTED] wrote: On Fri, 18 Aug 2006, Tom Boonen wrote: Dear List, why does as.data.frame(cbind()) transform numeric variables to factors, once one of the other variablesused is a character vector? # x.1 - rnorm(10) x.2 - c(rep(Test,10)) Foo - as.data.frame(cbind(x.1)) is.factor(Foo$x.1) Foo - as.data.frame(cbind(x.1,x.2)) is.factor(Foo$x.1) # I assume there is a good reason for this, can somebody explain? Thanks. Only if you can explain the good reason why you did not just use data.frame(x.1, x.2)! cbind() makes a matrix out of vectors, here a character matrix. And then as.data.frame() converts character columns to factors. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UKFax: +44 1865 272595 __ R-help@stat.math.ethz.ch 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] ARMA(1,1) for panel data
Dear List, I am new to TS-Modeling in R. I would like to fit an ARMA(1,1) model for a balanced panel, running Y on a full set of unit and year dummies using an arma(1,1) for the disturbance: y_it=unit.dummies+yeardummies+e_it where: e_it=d*e_it-1+u_it+q*u_it-1 How can I fit this model in R? arma() does not seem to take covariates (or I don't understand how to specify the function so that it would). Thank you very much. Best, Tom __ R-help@stat.math.ethz.ch 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.
