R help - Mar 2014 - plotting vectors of different lengths

Dear useRs,
I have two column vectors of different lengths say x=1,2,3,4,5,6,7,8 and
y=1,2,3,4,5. I wanted to plot them by using "points()" command over an
already existed image but got an error, "Error in xy.coords(x, y) :
'x' and 'y' lengths differ".What i actually wanted to do
was to plot the points in the following format.

dat <- read.table(text="
    1     2     3     4     5     6     7     8
1 (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (1,7) (1,8)
2 (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (1,7) (1,8)
3 (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (1,7) (1,8)
4 (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (1,7) (1,8)
5 (1,1) (1,2) (1,3) (1,4) (1,5) (1,6) (1,7) (1,8)
",sep="",header=TRUE,stringsAsFactors=FALSE)
How can i do it?
Thankyou very much indeed in advance.
Eliza
 		 	   		  
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