Dear all,

I want to plot 8 chemical variables in the same plot. I have used the interaction.plot command:

> interaction.plot(speclong$Date,speclong$time2,speclong$outcome,xaxt="n",type="l",pch=20,xlab="", log="y", ylab="Concentration (ug/L)",trace.label="",col=rainbow(8))
However, what it gives me is dotted lines and the colours are very fade. I was wondering if I can change the lines to be solid and as well to specify for each line the colour that I want.

Thanks a lot.

Maria

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