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.