[R] R2Cube integration errors

[George Trojan - NOAA Federal]

Why this happens?

> library("R2Cuba")
> f <- function(x) 0
> cuhre(ndim=1, ncomp=1, f)
Iteration 1:  11 integrand evaluations so far
[1] 0 +- 0      chisq 0 (0 df)
Iteration 2:  33 integrand evaluations so far
[1] 0 +- 0      chisq 0 (1 df)
integral: 0 (+-0)
nregions: 2; number of evaluations:  33; probability:  0
> vegas(ndim=1, ncomp=1, f)
Iteration 1:  1000 integrand evaluations so far
[1] 0 +- 7.02518e-18    chisq 0 (0 df)
. . .
Iteration 13:  52000 integrand evaluations so far
[1] 0 +- 2.65413e-18    chisq 0 (12 df)
integral: 0 (+-2.7e-18)
number of evaluations:  52000; probability:  0
failed with message  ‘Dimension out of range’
> suave(ndim=1, ncomp=1, f)
. . .
[1] 0 +- 7.02462e-17    chisq 0 (411 df)
integral: 0 (+-7e-17)
nregions: 50; number of evaluations:  50000; probability:  0
failed with message  ‘Dimension out of range’

Is this a bug?

George

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