R help - Nov 2006 - Boxplot

Hi,
I am new to R and am still trying to get a grip of it.

I have data in this format:

    Run Lab Batch  Y
1     1   1     1 608.781
2     2   1     2 569.670
3     3   1     1 689.556
4     4   1     2 747.541
5     5   1     1 618.134
6     6   1     2 612.182
7     7   1     1 680.203
8     8   1     2 607.766
9     9   1     1 726.232

and I want to make a boxplot of the Y values for each Batch. How would
I go about this?
I tried
boxplot(data.ceramic[ data.ceramic$Batch == "1", ]$Y ~ data.ceramic[
data.ceramic$Batch == "2", ]$Y, horizontal=T,xlab="Y",
ylab="Batch")

but was completley wrong

Thank you for your help.

Ben

Ah I think I've got it:

boxplot(Y ~ Batch, data=data, horizontal=T,xlab="Y",
ylab="Batch")


On 11/7/06, Benjamin Dickgiesser <dickgiesser at gmail.com>
wrote:
> Hi,
> I am new to R and am still trying to get a grip of it.
>
> I have data in this format:
>
>     Run Lab Batch  Y
> 1     1   1     1 608.781
> 2     2   1     2 569.670
> 3     3   1     1 689.556
> 4     4   1     2 747.541
> 5     5   1     1 618.134
> 6     6   1     2 612.182
> 7     7   1     1 680.203
> 8     8   1     2 607.766
> 9     9   1     1 726.232
>
> and I want to make a boxplot of the Y values for each Batch. How would
> I go about this?
> I tried
> boxplot(data.ceramic[ data.ceramic$Batch == "1", ]$Y ~
data.ceramic[
> data.ceramic$Batch == "2", ]$Y, horizontal=T,xlab="Y",
ylab="Batch")
>
> but was completley wrong
>
> Thank you for your help.
>
> Ben
>

Benjamin Dickgiesser wrote:
> Hi,
> I am new to R and am still trying to get a grip of it.
> 
> I have data in this format:
> 
>     Run Lab Batch  Y
> 1     1   1     1 608.781
> 2     2   1     2 569.670
> 3     3   1     1 689.556
> 4     4   1     2 747.541
> 5     5   1     1 618.134
> 6     6   1     2 612.182
> 7     7   1     1 680.203
> 8     8   1     2 607.766
> 9     9   1     1 726.232
> 
> and I want to make a boxplot of the Y values for each Batch. How would
> I go about this?
> I tried
> boxplot(data.ceramic[ data.ceramic$Batch == "1", ]$Y ~
data.ceramic[
> data.ceramic$Batch == "2", ]$Y, horizontal=T,xlab="Y",
ylab="Batch")
> 
> but was completley wrong
  Here are a few ideas, assuming your data are in the df data.frame:

par(las=1, mar=c(7,10,7,7))

boxplot(Y ~ BATCH, data = df, horizontal = TRUE, names=c("Batch1",
"Batch2"))

boxplot(Y ~ BATCH, data = subset(df, LAB == 1), horizontal = TRUE,
names=c("Batch1", "Batch2"))

boxplot(Y ~ BATCH + LAB, data = df, horizontal = TRUE, names
paste("Lab", rep(1:8, each = 2), "/Batch", rep(1:2, 8), sep
= ""))

library(lattice)

bwplot(BATCH ~ Y, data = df, horizontal=TRUE)

bwplot(BATCH ~ Y | LAB, data = df, horizontal=TRUE, layout=c(1,8,1))
> Thank you for your help.
> 
> Ben
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> 
-- 
Chuck Cleland, Ph.D.
NDRI, Inc.
71 West 23rd Street, 8th floor
New York, NY 10010
tel: (212) 845-4495 (Tu, Th)
tel: (732) 512-0171 (M, W, F)
fax: (917) 438-0894