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I'm trying to make a transition from S-plus under Windows to R under Linux. My immediate aim is to produce a scatter plot with two y-axes with different scales. That can be done in S-plus with a command of the following form: guiPlot( PlotType="Scatter", DataSet="execon", Columns="years,hstart,ship", AxisType="Multiple Y" ), where years, hstart, and

Hi all, I have scoured the archives of this forum but nothing quite seems to fit the bill... I would like to plot a graph displaying two variables (y axes) that share date as the x axis. However, the date values for each variable are not the same - for example, some parasitoids were not released on days that collections from the trap took place, whilst sometimes releases did occur on the same