Re: [R] densities from a list with data.frames

From: Antje <>
Date: Fri, 11 Apr 2008 13:57:37 +0200

Of course, I know, but I cannot apply the function "density" to a data frame (which is the element of the list) but to a vector coming from a data frame. That's my problem I'd like to solve... schrieb:
>> I have a list which consists of data frames (all data frames have the
> same
>> amount and type of columns but different length).
>> Now, I'd like to calculate for each data frame in the list the
>> density function
>> of the values of the fist column ($V1).
>> This list could be an example:
>> l <- list( data.frame(rnorm(100)), data.frame(rnorm(20)), data.
>> frame(rnorm(200)) )
> If you want to do the same thing to every element of a list, lapply (or
> sapply) is your friend.
> Try:
> lapply(l, function(x) density(x[,1]))
> Regards,
> Richie.
> Mathematical Sciences Unit
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> mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Fri 11 Apr 2008 - 12:01:17 GMT

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