# [R] update numeric values of list with new values...

Evan Cooch evan.cooch at gmail.com
Fri Sep 22 20:47:49 CEST 2017

```Thanks!

On 9/22/2017 12:34 PM, Bert Gunter wrote:
> Well,  that's a bit like driving from Boston to New York by way of
> Chicago.
>
> See ?structure
>
> test <- list(a=1,b=2,c=3)
> new <- c(4,5,6)
> test.new <- structure(as.list(new), names=names(test))
> test.new
> \$a
> [1] 4
>
> \$b
> [1] 5
>
> \$c
> [1] 6
>
> Cheers,
> Bert
>
>
>
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
> On Fri, Sep 22, 2017 at 7:51 AM, Evan Cooch <evan.cooch at gmail.com
> <mailto:evan.cooch at gmail.com>> wrote:
>
>     Solved it:
>
>     test <- list(a=1,b=2,c=3)
>     new <- c(4,5,6)
>
>     hold <- as.list(new)
>     updated_test <- replace(test,c(1:3),hold)
>
>     \$a
>     [1] 4
>
>     \$b
>     [1] 5
>
>     \$c
>     [1] 6
>
>
>
>     mean.parms <- as.list(mean.parms)
>
>     mm.parms <- replace(far.parms,c(1:length(far.parms)),mean.parms)
>
>
>     On 9/22/2017 10:34 AM, Evan Cooch wrote:
>
>         Suppose I have the following:
>
>         test <- list(a=1,b=2,c=3)
>
>         I also have a vector (or list, or something else...) with new
>         numbers
>
>         new <- c(4,5,6)
>
>         What I'm trying to figure out is how to take the list, and
>         update the numbers from {1,2,3} to {4,5,6}
>
>         So, in the end,I want the 'update' test list to look like
>
>         (a=4,a=5,a=6)
>
>         I tried a bunch of obvious things I know about 'replacing'
>         things (without success), but the problem in this instance
>         seems to be the fact that the list contains elements that are
>         expressions (a=1, a=2,...), while the new vector is simply a
>         set of numbers.
>
>         So, I want to change the numbers in the list, but retain the
>         character parts of the expressions in the list (I need to have
>         the list of expressions as is for other purposes).
>
>         Doable?
>
>
>
>
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