[R] function to create multiple lists

[David Winsemius]

On Jan 29, 2010, at 6:35 PM, David Winsemius wrote:

>
> On Jan 29, 2010, at 6:16 PM, Cat Morning wrote:
>
>> Hi all,
>> I want to write a function to create multiple lists (over 100  
>> lists). For example:
>>
>> for(i in 1:5)
>> pi = c(1:5)
>
> Try:
> p <-list()
> for(i in 1:5)
> p[[i]] = 1:5
>
> You can reference the third  elements of the first vector as:
>
> p[[1]][3]
>
>>
>> but when i type:
>> p2
>> i get the error
>> Error: object 'p2' not found
>>
>> I want the lists to be numbered in this fashion, because I want to  
>> create another function that goes something like:
>> for(i in 1:5)
>> {if(pi[1]*pi[1] = = 2)

Not sure what you intended here. Did you mean the square of pi[1] ,  
which I would have structured as p[[i]][1] , would be tested for  
equality with an integer? Ain't going to happen. Read up on the FAQ's  
materiall regarding the different uses of "==" and all.equal().

>> print(pi)}
>>
>> any ideas on how to get around this problem would be greatly  
>> appreciated.
>>
>> Thanks,
> -- 
-- 
David Winsemius, MD
Heritage Laboratories
West Hartford, CT