[R] where is a value in my list

[Grzes]

But it's not what I wont

I need get a number of line my list
5 is in: list[[1]][1] and list[[2]][1] so
I would like to get a vector k = 1,2


David Winsemius wrote:
> 
> 
> On Nov 15, 2009, at 10:01 AM, Grzes wrote:
> 
>>
>> I heve got a list:
>>
>> lista=list()
>> a=c(2,4,5,5,6)
>> b=c(3,5,4,2)
>> c=c(1,1,1,8)
>> lista[[1]]=a
>> lista[[2]]=b
>> lista[[3]]=c
>>
>>> lista
>> [[1]]
>> [1] 2 4 5 5 6
>>
>> [[2]]
>> [1] 3 5 4 2
>>
>> [[3]]
>> [1] 1 1 1 8
>>
>> I would like to know where is number 5 (which line)?
>>
>> For example I have got a loop:
>>
>>  k= vector(mode = "integer", length = 3)
>>
>> for(i in 1:3)
>> {
>> for (j in 1:length(lista[[i]])){
>> if ((lista[[i]][j])==5   k[i]= [i])
>> }
>> }
>>
>> This loop is wrong but I would like to get in my vector k sth like  
>> this:
>>
>> k = lista[[1]][1], lista[[2]][1]     ...or sth similar
> 
> I am a bit confused, since clearly lista[[1]][1] does _not_ == 5. It's  
> also unclear what type of output you expect ... character, list,  
> numeric?
> 
> See if these take you any further to your vaguely expressed goal:
> 
>  > lapply(lista, "%in%", 5)
> [[1]]
> [1] FALSE FALSE  TRUE  TRUE FALSE
> 
> [[2]]
> [1] FALSE  TRUE FALSE FALSE
> 
> [[3]]
> [1] FALSE FALSE FALSE FALSE
> 
>  > lapply(lista, function(x) which(x == 5) )
> [[1]]
> [1] 3 4
> 
> [[2]]
> [1] 2
> 
> [[3]]
> integer(0)
> 
>> --
> 
> 
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
> 
> ______________________________________________
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> 
> 

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