[R] convert multi dimensional array to list

R. Michael Weylandt michael.weylandt at gmail.com
Thu Oct 4 17:25:06 CEST 2012

On Thu, Oct 4, 2012 at 2:54 PM, anto.r <anto.rajaa at gmail.com> wrote:
> I have an 4D named array (the result of recast() on a dataframe) and would
> like to convert it to a list with the names retained.
> Example:
>>my.df<-expand.grid(name=c("Alf","Que"), month=c("May","Jun"),
> year=c("2011","2012"))
>>my.df.cast=cast(my.df.melt, year~name~month~variable)
> I want to convert it to a list so I can access the elements by name like
> to get the corresponding year-name matrix
> This assuming, lists provide an easier way to handle this data. Does it?

I might actually stick with an array, but avoid the dollar sign syntax:


would be one way.


> Also, may be there is a way to get the list I want from my.df without going
> through the melt and cast.  Any suggestions are welcome.
> Thanks in advance
> Anto
> PS: I came across threads for converting list to array but not the other way
> round.
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