[R] matrix and a function - apply function

[Eik Vettorazzi]

there is no need for 'apply' here, because R can handle vectors.

ord<-m[,1]+m[,2]/m[,1]



Am 02.02.2011 15:12, schrieb ADias:
> 
> Hi
> 
> I have this function and this matrix:
> 
> function(x,y) x+y/x
> 
> m<-matrix(c(1,2,4,2,10,8),3,2)
> 
>> m
>      [,1] [,2]
> [1,]    1    2
> [2,]    2   10
> [3,]    4    8
> 
> each row represent a point (x,y) in a chart and I want via my fucntion to
> calculate the image in order to get this results:
> 
> for point (1,2) I would get 1+2/1 = 3
> for point (2,10) I would get 2+10/2 = 7
> for point (4,8) I would get 4+8/4 = 6
> 
> I have tried using sapply here but I get this:
> 
>> sapply(m,function(x,y) x+y/x)
> Error in y/x : 'y' is missing
> 
> what I am doing wrong?
> 
> thanks
> ADias


-- 
Eik Vettorazzi
Institut für Medizinische Biometrie und Epidemiologie
Universitätsklinikum Hamburg-Eppendorf

Martinistr. 52
20246 Hamburg

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