R help - Apr 2014 - Doing box plots for part of the data??

HI folks

I'm wanting to do box plots of just 2 of my wells.

I can do it for all of them by using

boxplot(Barium~Well.ID,data=mydata, main="Barium",
ylab="mg/L")

to do for all 4 wells
Anyone have a sugestion on how to do it for only 2 wells like MW-1 and MW-2?

The data can be found?
http://www.doylesdartden.com/TEMP/mydata.csv

Thanks
David

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On 04/04/2014 02:20 PM, David Doyle wrote:
> HI folks
>
> I'm wanting to do box plots of just 2 of my wells.
>
> I can do it for all of them by using
>
> boxplot(Barium~Well.ID,data=mydata, main="Barium",
ylab="mg/L")
>
> to do for all 4 wells
> Anyone have a sugestion on how to do it for only 2 wells like MW-1 and
MW-2?
>
> The data can be found?
> http://www.doylesdartden.com/TEMP/mydata.csv
>
Hi David,
Try this:

dddf<-read.csv("mydata.csv")
dddf12<-dddf[dddf$Well.ID=="MW-1" |
dddf$Well.ID=="MW-2",]
dddf12$Well.ID<-factor(dddf12$Well.ID,levels=c("MW-1","MW-2"))
boxplot(Barium~Well.ID,dddf12)

Jim