[R] 'Split' character

[pomchip at free.fr]

Thanks Jim and Herinque for you reply.

The substitution you are both proposing works fine, except when a or b contains
decimal numbers (which is mostly my case in a real dataset). In this case, there
is no distinction between the decimal point and the one introduced by the split
function.
If the split function cannot be customized, then I guess I have to first
substitute the decimal point in my dataset by e.g. a * sign and change it back
to a . when the split is done...

Sebastien

jim holtman a écrit :
> Here is one way:
>
>> a<-1:10
>> b<-21:30
>> mydata<-data.frame(a,b)
>> mydata.split<-split(mydata,(mydata[,1:2]),drop=TRUE)
>> x <- mydata.split
>> # customize the names
>> names(x) <- sapply(strsplit(names(x), "\\."), paste, collapse="-my
character-")
>> x
> $`1-my character-21`
>   a  b
> 1 1 21
>
> $`2-my character-22`
>   a  b
> 2 2 22
>
> $`3-my character-23`
>   a  b
> 3 3 23
> ...........
>
> On Nov 24, 2007 6:15 PM,  <pomchip at free.fr> wrote:
>>
>> Dear R-users,
>>
>> The following code splits a very simple dataframe into a list, each element
of
>> the list being one line of the dataframe. You will see that the split
function
>> names each element of the list by using uses the content of a and b and
merging
>> them with a "." character. Is there a way to customize this character?
>>
>> a<-1:10
>> b<-21:30
>> mydata<-data.frame(a,b)
>> mydata.split<-split(mydata,(mydata[,1:2]),drop=TRUE)
>> mydata.split
>>
>> Thanks in advance for your help.
>>
>> Sebastien
>>
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>>
>
>
>