[R] List of sublists

[Dimitris Rizopoulos]

one way is the following:

df <- data.frame(month = as.character(rep(1:3, each = 30)), fac = 
factor(rep(1:2, each = 15)), data1 = round(runif(90), 2), data2 = 
round(runif(90), 2))

lapply(split(df, df$month), function(x) split(x, x$fac))


I hope it helps.

Best,
Dimitris


Lauri Nikkinen wrote:
> R users,
> 
> I would like to split this df by month and fac and produce list of sublists
> 
> df <- data.frame(month=as.character(rep(1:3,each=30)),fac=factor(rep(1:2,each=15)),
>             data1=round(runif(90),2),
>             data2=round(runif(90),2))
> 
> This
> 
> split(df, paste(df$month, df$fac))
> 
> produces just a single list. Any ideas?
> 
> Many thanks,
> Lauri
> 
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-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

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