Question

I created the following function with six args:

nDone <- function(under,strike,ttoe,vol,rf,dy) {
    pnorm(((log(under/strike)+ (rf-dy+(vol^2)/2)*ttoe)/(vol*(ttoe^0.5))))
}

nDone(90,100,3,0.17,0.05,0)
# Result: 
[1] 0.6174643

Now I create a vector with the same values in an object, and try to call the function using the vector, but get the following error:

d <- c(90,100,3,0.17,0.05,0)

nDone(d)

Error in under/strike : 'strike' is missing

What am I doing wrong and how to fix?

Answer 1

Try this

 do.call(nDone, as.list(d))

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Explanation of what’s happening in your first attempt by @joran from the comments:

R is seeing you pass a single argument to nDone, namely the vector d, which is handed off to the first function argument, under. Since you haven’t specified a default value for the others, they are missing and hence the error