[R] Boxplot

[Benjamin Dickgiesser]

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