I'm sure this is a really simple problem, but I've spent hours digging and I keep running into roadblocks.
I'm trying to get a simple chart with three time series. Similar to the attached example http://www.nabble.com/file/p25398419/Excel%2Bchart%2Bexample.pdf Excel+chart+example.pdf , something that was quite easy to do in Excel, except that I need a log y-axis: something that R can do and Excel can't. The data is in the attached CSV file http://www.nabble.com/file/p25398419/test%2Bchart%2Bdata.csv test+chart+data.csv . I can read it in OK, and create separate charts: testdata<- read.table("C:\\Files\\test chart data.csv", head = T, sep = ",",na.strings = "na") test_date = as.Date(testdata$Date,"%d-%m-%y") test_data_model = testdata$Model test_date_baseA = testdata$BaseDataA test_date_baseB = testdata$BaseDataB plot(test_date, test_data_model,type='l',log="y") plot(test_date, test_data_baseA,type='l',log="y") plot(test_date, test_data_baseB,type='l',log="y") grid() (Clearly at this point, each chart over-writes the previous one.) Next I try to get them onto a single chart, sharing the same y-axis. I'm sure I haven't done this very elegantly, but here goes: frame_model = data.frame(a=test_date,b=test_data_model) frame_A = data.frame(a=test_date,b=test_data_baseA) frame_B = data.frame(a=test_date,b=test_data_baseB) ts_model = ts(frame_model$b) ts_a = ts(frame_A$b) ts_b = ts(frame_B$b) ts.plot(ts_model,ts_a,ts_b,col=c("blue","red","green"),log="y") The problem is that I no longer have the date along the y-axis. How can I get that back? Finally, when I plot the separate time series, the grid() function geneates a grid where the vertical lines are not lined up with the year tick marks. I interpreted the topic help as saying that by default they would match the tick marks. How can I achieve that? Thanks for any suggestions, Guy Green -- View this message in context: http://www.nabble.com/Simple-time-series-questions-tp25398419p25398419.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.
