On Wed, 2 Nov 2011, Bert Gunter wrote:
To make such a plot, I would have thought your want your data structure to
be:
Column A: Date
Column B; Chemical
Column C: Result
Thanks, Bert. I have a data frame in that format.
After subsetting this to the chemicals you want or doing the subsett
Of course I left out the "data" argument:
boxplot(Result ~ Chemical, data= yourdat,subset=yourdat$Chemical %in%
c("Ca","Cl", "Cond","Mg","Na","SO2","TDS"))
-- Bert
On Wed, Nov 2, 2011 at 10:08 AM, Bert Gunter wrote:
> To make such a plot, I would have thought your want your data structure to
>
To make such a plot, I would have thought your want your data structure to
be:
yourdat:
Column A: Date
Column B; Chemical
Column C: Result
After subsetting this to the chemicals you want or doing the subsetting in
your plot command, something like (base R)
boxplot(Result ~ Chemical, subset
>I have measured values for 47 chemicals in a stream. After processing
> the original data frame through reshape2, the recast data frame has this
> structure:
>
> 'data.frame': 256 obs. of 47 variables:
> $ site : Factor w/ 143 levels "BC-0.5","BC-1",..: 1 1 1 2 2 2 2 2
2 2...
> $
On Wed, 2 Nov 2011, Rich Shepard wrote:
I want a subset of this with only 7 chemicals: Ca, Cl, Cond, Mg, Na, SO4,
and TDS.
I should have also written that what I ultimately want is to create a
box-and-whisker plot for these 7 chemicals in a single panel. If that can be
done directly from th
I have measured values for 47 chemicals in a stream. After processing
the original data frame through reshape2, the recast data frame has this
structure:
'data.frame': 256 obs. of 47 variables:
$ site : Factor w/ 143 levels "BC-0.5","BC-1",..: 1 1 1 2 2 2 2 2 2 2
...
$ sampdate : Date,
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