How to get a vector to work as an argument in my function in r?

Question

I am trying to get my function (in r) to work with a two-element vector as an argument, but when I run the function with inputs, one of the elements is "not found".

I've tried using a placeholder as the argument and defining the placeholder later in the function. I've also tried to use concatenated values directly as the argument.

mse.func <- function(ya.vctr, N=gmp$pop, Y=gmp$pcgmp){ ya.vctr <- c(y, a) mean.sq.er <- mean((Y - (y * (N^a)))^2) return(mean.sq.er) } mse.func(c(5000, 0.10))

I'm expecting a numerical value but mse.func(c(5000, 0.10)) returns an error stating that "object 'y' is not found".

There is no object y defined in your function call. There is also no object a. Why are you overwriting your vector, ya.vctr with these values if you're already providing the function call with ya.vctr the value of c(5000, 0.10)? My guess is you mean to do y <- ya.vctr[1]; a <- ya.vctr[2]. — caldwellst
– caldwellst, Commented Oct 20, 2019 at 21:09

prosoitos · Accepted Answer · 2019-10-20 21:13:27Z

This should work:

mse.func <- function(ya.vctr, N=gmp$pop, Y=gmp$pcgmp){ mean.sq.er <- mean((Y - (ya.vctr[1] * (N^ya.vctr[2])))^2) return(mean.sq.er) } mse.func(c(5000, 0.10))

Alternatively, a simpler option is (though it does not accept a vector as input, so it does not answer the question):

mse.func <- function(y, a, N=gmp$pop, Y=gmp$pcgmp){ mean.sq.er <- mean((Y - (y * (N^a)))^2) return(mean.sq.er) } mse.func(5000, 0.10)

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