> Dear R useRs,
> I have a problem to add title to the following graphics;
> Tukey=TukeyHSD(aov(CA~C), "C",ordered=TRUE))
> plot (Tukey, main="My first graph")
> actually, it draw a graph, but it also display:
> parameter "main" could not be set in high-level plot() function.
> If I execute:
> plot(rnorm(1000),main="My first plot"), no error occur.
> What's the difference in those two examples? Thanks in advance.
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The title is hardcoded in plot.TukeyHSD().
and see its code. Simply adapt it as you need ...