[R] Histogram ploting

[Mateusz Łoskot]

Hi,

It's my first post on this group.
I've just started learning & using R and I like it ;-)
I have I think simple question. I'm trying to plot
a histogram for my data set.
My data set is defined as follows:

Class	N
12.5	3
17.5	10
22.5	12
27.5	8
32.5	7
37.5	3
42.5	4
47.5	2

Class means middle of set of my ranges I define.
N column stores number of measurements counted to
particular class.
And now I would like to plot a simple histogram presenting
numbers of measurements in each class.
As I read in manual, hist function takes x (my N) as the first param
but I can not identify how should I pass my
class ranged into hist function.
I believe you can understand my problem ;-)))
Could anyone help me ?

Kind regards

-- 

Mateusz Łoskot
mateusz at loskot dot net