[R] Color & pch functionalities in dotchart()

[Bert Gunter]

... and see also the "color specification" info in ?par as well as the
linked  ?palette. You may be wrapping around if yu have more
categories than colors in your palette.

-- Bert


Bert Gunter

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
   -- Clifford Stoll


On Tue, Nov 3, 2015 at 7:42 AM, Bert Gunter <bgunter.4567 at gmail.com> wrote:
> Look at your code!
>
> color was specified as "as.factor..."
> and pch was specifed as "..." (no as.factor() )
>
> Read an R tutorial on how factors are coded for why this would make a
> difference.
>
> -- Bert
>
>
> Bert Gunter
>
> "Data is not information. Information is not knowledge. And knowledge
> is certainly not wisdom."
>    -- Clifford Stoll
>
>
> On Tue, Nov 3, 2015 at 5:58 AM, GINGINS Simon <simon.gingins at unine.ch> wrote:
>> 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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