[R] boxplot via plot command

[Antje]

Hi,

thank you both for your response.
I don't want to do anything like this - I just got some code like this from 
someone else and was wondering about the result.
I would have used another approach to create a boxplot like this...

Ciao,
Antje

markleeds at verizon.net schrieb:
>  hi: i'm not well versed in the OO mechanism behind R but you've created 
> a dataframe with one column being factors so,
> when the plot command sees this, there must be code in the plot generic 
> that decided that the best thing to use is a boxplot.
> 
> I'm not sure what you want since you have 3 factors but below is a guess 
> ? I split by the factor and then plot the values seperately
> with the colors denoting the factors ? if it's not what you want, then i 
> would resend your question to the list explaining what you
> do want because there are others on this list that can probably help you 
> more than i can. good luck.
> 
> x <- rnorm(300)
> l <- c(rep("label1",100), rep("label2",50), rep("label3",150))
> 
> df <- data.frame(l=as.factor(l), x)
> print(df)
> print(str(df))
> 
> temp <- split(df,df$l)
> 
> plot(temp[[1]]$x,ylim=c(min(temp[[1]]$x,temp[[2]]$x,temp[[3]]$x),
> 
> max(temp[[1]]$x,temp[[2]]$x,temp[[3]]$x)),col="green")
> 
> lines(temp[[2]]$x,type="p",col="blue")
> lines(temp[[3]]$x,type="p",col="red")
> 
> 
> 
> On Tue, Dec 2, 2008 at  3:30 AM, Antje wrote:
> 
>> Hi folks,
>>
>> I've just discovered that the following code leads to boxplot 
>> (surprisingly to me).
>> Can anybody explain to me why? Is this documented somewhere? I've 
>> never consider this option before.
>>
>> x <- rnorm(300)
>> l <- c(rep("label1",100), rep("label2",50), rep("label3",150))
>>
>> df <- data.frame(as.factor(l), x)
>> plot(df)
>>
>>
>> Thank you!
>> Antje
>>
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>