Plot numeric and categorical variable

My data consists of numeric (yy) and categorical (xx) variables, as shown below.?
xx = c(rep("C", 5), rep("D",5))> xx?[1] "C" "C" "C" "C" "C" "D" "D" "D" "D" "D"> yy = rnorm(10, 0, 4)> yy?[1] ?2.7219346 -3.7142481 ?6.8716534 -0.9352463 ?0.4901249 ?3.8113247?[7] -2.6602041 ?1.7714471 ?4.7298233 ?0.8848188
xx1 = as.integer(as.factor(xx))> plot(xx1, yy, ylim = c(-13.5, 4), col="blue")
I have attached the plot above ?as plot1
I wish to generate a scatter plot of the data such that instead of 1 it prints C, and instead of 2, it prints D on the x- axis (see plot1 attached).
How could I possibly go about this, let me know. Any help will be greatly appreciated.
Thanks in advance for your help,JN
My data consists of numeric (yy) and categorical (xx) variables, as shown below.
xx = c(rep("C", 5), rep("D",5))>  xx [1] "C" "C" "C" "C" "C" "D" "D" "D" "D" "D">  yy = rnorm(10, 0, 4)>  yy [1]  2.7219346 -3.7142481  6.8716534 -0.9352463  0.4901249  3.8113247 [7] -2.6602041  1.7714471  4.7298233  0.8848188
xx1 = as.integer(as.factor(xx))>  plot(xx1, yy, ylim = c(-13.5, 4), col="blue")
I have attached the plot above  as plot1
I wish to generate a scatter plot of the data such that instead of 1 it prints C, and instead of 2, it prints D on the x- axis (see plot1 attached).
How could I possibly go about this, let me know. Any help will be greatly appreciated.
Thanks in advance for your help,JN
Sounds like homework?!
Anyway, see ?par and ?axis to answer your question directly or ?boxplot 
more implicitly...

Best,
Uwe Ligges

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Not to mention that I answered this exact question only
yesterday.

2011/12/6 Uwe Ligges <ligges at statistik.tu-dortmund.de>:
On 05.12.2011 23:22, Juliet Ndukum wrote:
My data consists of numeric (yy) and categorical (xx) variables, as shown
below.
xx = c(rep("C", 5), rep("D",5))> ?xx [1] "C" "C" "C" "C" "C" "D" "D" "D"
"D" "D"> ?yy = rnorm(10, 0, 4)> ?yy [1] ?2.7219346 -3.7142481 ?6.8716534
-0.9352463 ?0.4901249 ?3.8113247 [7] -2.6602041 ?1.7714471 ?4.7298233
?0.8848188
xx1 = as.integer(as.factor(xx))> ?plot(xx1, yy, ylim = c(-13.5, 4),
col="blue")
I have attached the plot above ?as plot1
I wish to generate a scatter plot of the data such that instead of 1 it
prints C, and instead of 2, it prints D on the x- axis (see plot1 attached).
How could I possibly go about this, let me know. Any help will be greatly
appreciated.
Thanks in advance for your help,JN

Sounds like homework?!
Anyway, see ?par and ?axis to answer your question directly or ?boxplot more
implicitly...

Best,
Uwe Ligges

Sarah Goslee
http://www.functionaldiversity.org