[R] Plotting a graph for every Level of a Factor

[jimdare]

Hello,

Using the dataset below, is there a way to generate a bar/line plot for the
TACC/Catch of every lvl of stock?  i.e. OR1,OR3,OR5.  The picture at the
bottom of this post is an example of the bar/line plot for OR1 which was
generated when OR1 was the only stock in the table.  This was created, with
help from Marc Schwartz, using: 

> mp <- barplot(fish$TACC, space = 0, names.arg = fish$Year,ylim=c(0,13000)) 
> lines(mp, fish$Catch, type = "b", pch = 19) 
 
Is there a way to instruct R to plot this for one particular stock from the
table below, and, if so, is there a way to automate it so it plots a figure
for each individual stock.

Data frame (fish)

Year   Species Stock TACC Catch
2001	   ORH	   OR1	   5000	    4687
2002	   ORH	   OR1	   6000	    3215
2003	   ORH	   OR1	   7000	    6782
2004	   ORH	   OR1	   9000	    10000
2005	   ORH	   OR1 	   9000	    12000
2001	   ORH	   OR3	   20000	   7892
2002	   ORH	   OR3	   25000	   27000
2003	   ORH	   OR3	   30000	   32000
2004	   ORH	   OR3	   30000	   29000
2005	   ORH	   OR3	   30000	   30000
2001	   ORH	   OR5	   23000	   10982
2002	   ORH	   OR5	   23000	   24590
2003	   ORH	   OR5	   23000	   24035
2004	   ORH	   OR5	   25000	   29008
2005	   ORH	   OR5	   20000	   21092

http://www.nabble.com/file/p21340956/OR1.gif 
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