Try the zoo package: plot(as.yearqtr(time.val), inc, col = 'red', type = 'l')
On Wed, Jan 20, 2010 at 3:41 PM, mah <harwood...@gmail.com> wrote: > I am trying to generate a line graph with quarterly time buckets (with > nice labels) on the x-axis. The first block of code below will > generate the graph with nicely formatted x-axis labels, but the > "type=" and "col=" options are not recognized when factors are used > for the x-axis. > > The second block, where the quarter values are mapped into dates, will > plot the line nicely but the x-axis is the number of days since > 1/1/1970. How do I either get the first block to recognize the > desired format, or the second block to format the x-axis as quarters? > > Thank you in advance! > > #block 1 > time.val <- as.factor(c > ("2004Q1","2004Q2","2004Q3","2004Q4","2005Q1","2005Q2")) > inc <- c(0.9903797, 1.3741467, 0.9938702, 0.4252443, 0.7700158, > 1.1770313) > > # returns nice x-axis, but black points > plot(time.val, inc, type="b", col="red") > > #block 2 > time2 <- > ifelse (substr(time.val,5,6) == "Q1", > as.Date(paste("1/1/",substr(time.val,1,4),sep=""),"%m/%d/%Y"), > ifelse (substr(time.val,5,6) == "Q2", > as.Date(paste("4/1/",substr(time.val,1,4),sep=""),"%m/%d/%Y"), > ifelse (substr(time.val,5,6) == "Q3", > as.Date(paste("7/1/",substr(time.val,1,4),sep=""),"%m/%d/%Y"), > as.Date(paste("10/1/",substr(time.val,1,4),sep=""),"%m/%d/%Y")))) > > #returns red lines but the axis is the number of days since 1/1/1970 > plot(time2, inc, type="b", col="red") > > ______________________________________________ > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.