Hi,

I am currently building graphs using dochart(). I plotted the points in two 
different colors according to specific criteria from my dataset. Later, I 
decided to also give them different symbols, for easier reading if printed. I 
got quite a surprise when I realized that, even though I gave the same variable 
to both color= and pch= , I got a mix of the colors and symbols. I wanted one 
type of symbol to be only one color, and the second only the other color, and 
it is clearly not what happened. From my data, I would say that the pch= 
argument is not dealing properly with the variable I gave it. I tried using a 
dataset from R to see if this was only in my dataset, and it did the same. 
here’s a reproducible example, using beaver1:

dotchart(beaver1$temp, groups=factor(beaver1$day), 
color=as.factor(beaver1$activ), pch=beaver1$activ)

Does anyone know why, with the same variable, the arguments color & pch give 
different results? 

That would be of great help, since now I am no longer sure which one isthe 
correct representation of my data.

Best regards & many thanks for the help

Simon Gingins
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