CODEWITHSUNDEEP
rlist
MaxPowers
MaxPowers

Reputation: 5486

Getting elements of a list in R

This is my problem:

There is a predefined list named gamma with three entries: gamma$'2' is 2x2 matrix gamma$'3' a 3x3 matrix and gamma$'4' a 4x4 matrix. I would like to have function that returns the matrix I need:

GiveMatrix <- function(n) {
    gamma.list <- #init the list of matrices

    gamma.list$n  # return the list entry named n

Since n is not a character, the last line does not work. I tried gamma.list$paste(n)and gamma.list$as.character(n)but both did not work. Is there a function that converts nto the right format? Or is there maybe a much better way? I know, I am not really good in R.

Upvotes: 0

Views: 4957

Answers (2)

MaxPowers
MaxPowers

Reputation: 5486

I've found it!

gamma.list[as.character(n)] is the solution I needed.

Upvotes: 0

Paul Hiemstra
Paul Hiemstra

Reputation: 60984

You need to use:

gamma.list[[as.character(n)]]

In your example, R is looking for a entry in the list called n. When using [[, the contents of n is used, which is what you need.

Upvotes: 4

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