promise already under evaluation: recursive default argument reference or earlier problems?

Question

Here is my R code. The functions are defined as:

f <- function(x, T) {
  10 * sin(0.3 * x) * sin(1.3 * x ^ 2) + 0.001 * x ^ 3 + 0.2 * x + 80
}

g <- fu         


        

Answer 1

If you especify argument evaluation context, you avoid the problem of same name:

f <- function(x) {
  10 * sin(0.3 * x) * sin(1.3 * x ^ 2) + 0.001 * x ^ 3 + 0.2 * x + 80
}
g <- function(x, t=1, f=parent.frame()$f) {
  exp(-f(x) / t)
}
test <- function(g=parent.frame()$g, t=1) { 
  g(1,t)
}
test()
[1] 8.560335e-37