R help - Feb 2009 - Sum(..) in apply()

Dear,

I have a set of ascii-grids. For each gridcell I want to count all values
that lie between 15 and 6. 
Therefore I combined the ascii-grids in an array and used 

result<- apply(temp,2,sum((temp <=15)&(temp > 6)), na.rm=TRUE)

But, this doesn`t work. It seems that the combination apply with sum(...) is
not working, since the pure 
apply(object,2,sum) does work.

May you help me want to do here instead?

Thank you very much in forward

Ole




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ole_roessler wrote:
> Dear,
> 
> I have a set of ascii-grids. For each gridcell I want to count all values
> that lie between 15 and 6. 
> Therefore I combined the ascii-grids in an array and used 
> 
> result<- apply(temp,2,sum((temp <=15)&(temp > 6)), na.rm=TRUE)
> 
> But, this doesn`t work. It seems that the combination apply with sum(...)
is
> not working, since the pure 
> apply(object,2,sum) does work.
> 
> May you help me want to do here instead?

You probably want

  result <- apply(temp <= 15 & temp > 6, 2, sum, na.rm=TRUE)

Uwe Ligges

> Thank you very much in forward
> 
> Ole
> 
> 
> 
>

Try this:

result<- apply(temp,2,function(column)sum((column <=15)&(column >
6)),
na.rm=TRUE)


On Wed, Feb 4, 2009 at 2:48 PM, ole_roessler
<o.roessler@giub.uni-bonn.de>wrote:
>
> Dear,
>
> I have a set of ascii-grids. For each gridcell I want to count all values
> that lie between 15 and 6.
> Therefore I combined the ascii-grids in an array and used
>
> result<- apply(temp,2,sum((temp <=15)&(temp > 6)), na.rm=TRUE)
>
> But, this doesn`t work. It seems that the combination apply with sum(...)
> is
> not working, since the pure
> apply(object,2,sum) does work.
>
> May you help me want to do here instead?
>
> Thank you very much in forward
>
> Ole
>
>
>
>
> --
> View this message in context:
> http://www.nabble.com/Sum%28..%29-in-apply%28%29-tp21834429p21834429.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help@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<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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