CODEWITHSUNDEEP
rvariablesattributes
kuba
kuba

Reputation: 1025

Refering to an attribute of an object by another variable in R

Is there any way to refer to the attributes of the objects by some other variable in R? The following example will explain, what I mean.

Let's say we have an object with some attributes - the kind of object is not important for the question. For example we can have

x <- 1:100
y <- x+rnorm(100)
obj <- lm(y~x+1)

Now I would like to write a function with an argument that would refer to one specific attribute of an object. For example, I would like to write a function, which would print values of some attributes of the created object. Specifically I want to have something like this:

fun <- function(obj, attr) {
          print(obj$attr)
       }

My question is, what is the way to refer to an attribute of an object by some other variable. I know that the example is silly, but I want to call attention to the problem, not to the function.

Thanks in advance

Kuba

Upvotes: 1

Views: 600

Answers (1)

agstudy
agstudy

Reputation: 121598

You can use something like :

fun <- function(obj, attr) {
          print(obj[[attr]])
       }

For example , 

fun(obj,'call')
lm(formula = y ~ x + 1)

Upvotes: 4

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