[R] R graphics

[Mcdonald, Grant]

Dear sir,

I am trying to create a barplot for two propotions, with proportions successful on the y and age on the x.  So my data is in the formate of one vector containing 0s and 1s (i.e.successful or not) with a corresponding two level vector of age.

success        age
1                     old
0                    young
0                     young
1                     old

Howeber i cannot find a way to stop r stacking the data using the code:  plot(successfulYN~maleage) as it ends up showing both proportions as i only want the proportions of success to show. 
also entering it as a table results in x axis being removed maybe though this is the only way
could you please offer any help?

Grant McDoanld