R help - Aug 2009 - table, sum, cat function

Hi,

the second step in my exercice is to calculate the sum of the amout for each
class et not the frequency

i have this vector

x           y
1          100
2          1500 
3          3250
4          6250
5          2000
6           450


i want to use the function table and cat to calculate the sum of the amount in
each class [0-1000], [1000-3000],[> 3000]

Thank you for your help??

inchallah


      
	[[alternative HTML version deleted]]

the second step in my exercice is to calculate the sum of the amout for each
   class et not the frequency
   i have this vector
   x           y
   1          100
   2          1500
   3          3250
   4          6250
   5          2000
   6           450
   i want to use the function table and cat to calculate the sum of the amount
   in each class [0-1000], [1000-3000],[> 3000]
   You want to use cut, not cat.  Take a look at the examples on the cut help
   page - they will help you.
   Regards,
   Richie.
   Mathematical Sciences Unit
   [1]HSL
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Hi

r-help-bounces at r-project.org napsal dne 25.08.2009 12:07:11:
> Hi,
> 
> the second step in my exercice is to calculate the sum of the amout for 
each 
> class et not the frequency 
> 
> i have this vector
> 
> x           y
> 1          100
> 2          1500 
> 3          3250
> 4          6250
> 5          2000
> 6           450
> 
> 
> i want to use the function table and cat to calculate the sum of the 
amount in
> each class [0-1000], [1000-3000],[> 3000]
It starts to look like some kind of homework. If yes you shall seek the 
help from your tutor.

If you want to do it yourself than tapply, by, aggregate or package doBy 
could be good starting point.

Regards
Petr

> 
> Thank you for your help??
> 
> inchallah
> 
> 
> 
>    [[alternative HTML version deleted]]
> 
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