Re: [R] list()

From: Erik Iverson <iverson_at_biostat.wisc.edu>
Date: Wed, 19 Mar 2008 08:11:28 -0500

Scott -

Not sure about online references, I'm sure there are some. But any R book should have a complete discussion of lists.

I learned from Modern Applied Statistics with S (MASS). Under the "Books" section of www.r-project.org, you'll find a comprehensive list of books dealing with R, including MASS.

You can do the following to augment an already existing list.

model <- list(var1 = 5, var2 = 10)
model$var3 <- 20

Best,
Erik Iverson

Scott Romans wrote:
> Is anyone familiar with a good tutorial (in print or online) on the
> use of list()? I found Matlab structures to be a great way to pass
> complex variables (such as a model consisting of differently-
> dimensioned variables) back and forth between functions. It seems
> list() requires that you define the components within the command
> (model <- list( var1 =" ", var2 = " ", etc) and that if you don't
> fully define and name the component variables WITHIN the list command,
> you won't be able to refer to them by name elsewhere. Instead, you
> will have to remember the order and call the component variables as
> model[[1]] etc. instead of model$var1. Is this a correct
> understanding? Are there any good, comprehensive explanations on
> list() with examples?
>
> Thanks!
>
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