[R] multiple x factors using the sciplot package

Dear R community, I am a beginner using the sciplot package to graph barplots. I would like to be able to graph two x factors (Sampling.year and Period). Sampling.year: 2006, 2007, 2008, 2009 Period: First, Second, Total The parameter group is the different species I looked at. They

Re: [R] multiple x factors using the sciplot package

Hi: You can probably do what you want in either ggplot2 or lattice, but I would recommend at least a couple different approaches: (1) Plot individual bar charts by combinations of year and period. This is easy to do in both ggplot2 and lattice: in ggplot2, one would use geom_bar(x) +