Hi,
Many thanks for the explanation.
Alberto Monteiro wrote:
>
>PS: fff <- function(x) 1
>integrate(fff, 0, 1) # error. why?
>
Guess: because integrate itself expects a "vectorized function" ?
> fff(1:5)
[1] 1
> ggg<-function(x) { sapply(x, function(x)1) }
> ggg(1:5)
[1] 1 1 1 1 1
> integrate(ggg,0,1)
1 with absolute error < 1.1e-14
> hhh<-function(x) 1+0*x
> integrate(hhh, 0, 1)
1 with absolute error < 1.1e-14
I sense a certain lack of intuitiveness here :-/
regards, Theo
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