[R] Help Reformatting a Data table

[Michael E. Steiper]

Hi, I am a relative newbie to R, so thanks in advance for the patience.

I am interesting in changing a table with year data into a format that
is friendlier for making bar charts. I currently have a table with the
same year appearing a number of times as separate rows.  I want to
change this so that each row is equivalent to a particular year.

Here is an example of my current format:

TAX	YEAR	NUMBER
A	2000	          2
A	2001		  2
A	2002	          3
A	2003	           1
B	2000	          3
B	2001	          4
B	2002	          3
B	2004	           2

A<-data.frame(c("A", "A", "A", "A", "B","B","B","B"),
c(2000,2001,2002,2003,2000,2001,2002,2004), c(2,2,3,1,3,4,3,2))
colnames(A) = c("TAX", "YEAR", "NUMBER")

I want to Change this to the following:

YEAR	A	B
2000	       2	3
2001	       	2	4
2002	       3	3
2003	       1	0
2004    	0	2

Any help would be appreciated!

Of course, while I am posting, I'll also ask for any tips for creating
a barchart with the X axis being "YEAR".

Thanks for the time

Mike