[R] sum in vector

[Feng Mai]

to be more general you can also use aggregate:

aggregate(price,list(market),sum)


Henrique Dallazuanna wrote:
> 
> Try this:
> 
>  rowsum(price, market)
> 
> On Sun, Nov 14, 2010 at 10:02 AM, lgpeco <pavic.olic at gmail.com> wrote:
> 
>>
>> hy guys i have one question :)
>>
>> i have two vectors markets and price
>>
>> market <- c(1, 5, 7, 9, 9, 6, 5, 4, 4, 3, 1, 2, 1)
>> price <- c(100, 20, 30, 10, 50, 23, 23, 33, 96, 6, 4, 38, 96)
>> i would like sum prices: market 1: (100+4+96), market 2: (38),..., market
>> 9:
>> (10+50)
>> ao i would like get this result: (200, 38, ..., 60)
>> and i don't wanna use while, for loops... is there any other function to
>> sum
>> these :)
>>
>> tnx for helping ;)
>> --
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>>
>> ______________________________________________
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>>
> 
> 
> 
> -- 
> Henrique Dallazuanna
> Curitiba-Paraná-Brasil
> 25° 25' 40" S 49° 16' 22" O
> 
> 	[[alternative HTML version deleted]]
> 
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> 

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