Hi
Can you please specify how loop without index shall be constructed? It is rather
new topic for me.
Petr
From: carol white [mailto:wht_crl at yahoo.com]
Sent: Friday, June 05, 2015 11:21 AM
To: PIKAL Petr
Subject: Re: [R] building a list in a loop
also consider a loop without index (not like for (i ...) where index could be
used for the list construction)
Cheers,
On Friday, June 5, 2015 11:13 AM, PIKAL Petr <petr.pikal at
precheza.cz<mailto:petr.pikal at precheza.cz>> wrote:
Hi
It is not clear what exactly do you want.
d<-list()
vec<-1:3
for (i in 1:2) {
vec<-vec+3*(i-1)
d[[i]]<-vec
#names(d)[i] <- paste("name",i)
}
You can add names in second loop or you can use names command in first loop.
Cheers
Petr
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at
r-project.org<mailto:r-help-bounces at r-project.org>] On Behalf Of carol
> white via R-help
> Sent: Friday, June 05, 2015 10:40 AM
> To: R-help Help
> Subject: [R] building a list in a loop
>
> It might be an easy question but how to construct correctly a list in a
> loop?
>
> The following doesn't work
> before starting the loopd = NULL#in the loop, 1st iteration
> d = list(d,c(1,2,3)d[[1]]
> NULL
>
> [[2]]
> [1] 1 2 3#in the loop, 2nd iterationd=list(d,c(4,5,6)d
> [[1]]
> [[1]][[1]]
> NULL
>
> [[1]][[2]]
> [1] 1 2 3
>
>
> [[2]]
> [1] 4 5 6
> the goal is to have the result of d= list(c(1,2,3),c(4,5,6)) where the
> list components are not known out of the loop.
> d[[1]]
> [1] 1 2 3
>
> [[2]]
> [1] 4 5 6
> Moreover, how to name the components of the list in the loop while
> constructing as the names are not known out of the loop, either? note
> that the name of the component is stored in a variable in the loop
>
> d = NULL#name1 contains the name for c(1,2,3), how to give the name
> below?
> d = list(d,c(1,2,3)
> Thanks
>
> [[alternative HTML version deleted]]
>
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