[R] plot function creating bars instead of lines

Hello, I am having a problem where code that plots lines using a different data frame plots bars with the current data frame (I am intended to plot lines). The code specifies lines (see below), so I can't figure out why the results are bars. I suspect that it may have something to do with the fact

Re: [R] using "factor" to eliminate unused levels without dropping other variables

That did the trick! Thank you much, Richard Heiberger. -- View this message in context: http://r.789695.n4.nabble.com/using-factor-to-eliminate-unused-levels-without-dropping-other-variables-tp4577123p4577206.html Sent from the R help mailing list archive at Nabble.com. _