[R] apply for list or list -> array

[Uwe Ligges]

Ahn ChaeHyung wrote:

> Dear all,
> 
> I have the following list, "aa", composed of two 3*3 tables.  I would like 
> to use "apply" function to summarize it, but "apply" cannot handle "list".  
> I want to do it without using any interation.
> 
> 1. Is there any function like "apply" for list?
> 2. Is there any way to transform that "list" to a 2*3*3 "array"?


Use lapply() or sapply().
Example to transpose both matrices:
lapply(a, t)


Uwe Ligges



> thanks
> 
> cahn
> 
> -----------------------------------------
> 
>>aa
> 
> [[1]]
>      [,1] [,2] [,3]
> [1,]    1    3    1
> [2,]    2    0    1
> [3,]    1    1    0
> 
> [[2]]
>      [,1] [,2] [,3]
> [1,]    1    3    1
> [2,]    2    0    1
> [3,]    1    1    0
> 
> 
> I would like to avoid any iteration
> 
> 
> 
> -------------------------------------------------
> Ahn, Chaehyung (cahn) Ph.D.
> Alpha-Gamma Technologies Inc.
> My Home: http://blog.naver.com/cahn88
> 
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