Hello I am trying to computes Moran's I autocorrelation coefficient of x giving a matrix of weights using the ape package. The null hypothesis of no correlation is tested assuming normality of the Moran's coefficient under this null hypothesis. I got a p-value=0

Does it mean that the p value is incredibly small that R cannot approximate it?

What is the lowest number that R displays before rounding it to 0? Can I change any options to get a number different than zero?

Thanks a lot

```
ape::Moran.I(residuals(mod_glm), distm.inv)
moran.test
```

Results

```
$observed
[1] 0.04225105
$expected
[1] -0.001015228
$sd
[1] 0.001640934
$p.value
[1] 0
```