Unused arguments error in R studio - r

Question

I get an error when I try to run this line of code:
nnetPred.model <- nnetPred(X, Y, step_size = 0.4,reg = 0.0002, h=50, niteration = 6000)
The error message is:
Error in nnetPred(X, Y, step_size = 0.4, reg = 2e-04, h = 50, niteration = 6000) :
unused arguments (step_size = 0.4, reg = 2e-04, h = 50, niteration = 6000)
My code is as below:
nnetPred <- function(X, Y, para = list()){
W <- para[[1]]
b <- para[[2]]
W2 <- para[[3]]
b2 <- para[[4]]
N <- nrow(X)
hidden_layer <- pmax(0, X%*% W + matrix(rep(b,N), nrow = N, byrow = T))
hidden_layer <- matrix(hidden_layer, nrow = N)
scores <- hidden_layer%*%W2 + matrix(rep(b2,N), nrow = N, byrow = T)
predicted_class <- apply(scores, 1, which.max)
return(predicted_class)
}
nnetPred.model <- nnetPred(X, Y, step_size = 0.4,reg = 0.0002, h=50, niteration = 6000)

Answer 1

It looks like you are trying to use variable arguments. In R, this means the ellipsis (...). This is how you would define the top of nnetPred to use variable arguments:
nnetPred <- function(X, Y, ...) {
para <- list(...)
This will work in your case, but is not really the best way to define that function, because it looks like you have a finite number of parameters. Only when you have an unknown number of parameters should you use variable argument lists. I would recommend simply putting your parameters in the parameter list. You can rename them if you want to:
nnetPred <- function(X, Y, step_size, reg, h, niteration) {
W <- step_size
b <- reg
W2 <- h
b2 <- niteration

Answer 2

try <- emd(xt2, tt2, boundary="wave")
Error in emd(xt2, tt2, boundary = "wave") :
unused argument (boundary = "wave")