# npfun

From spatstat v1.61-0
by Adrian Baddeley

##### Dummy Function Returns Number of Points

Returns a summary function which is constant with value equal to the number of points in the point pattern.

- Keywords
- spatial, nonparametric

##### Usage

`npfun(X, ..., r)`

##### Arguments

- X
Point pattern.

- …
Ignored.

- r
Vector of values of the distance argument \(r\).

##### Details

This function is normally not called by the user. Instead it is passed
as an argument to the function `psst`

.

##### Value

Object of class `"fv"`

representing a constant function.

##### See Also

##### Examples

```
# NOT RUN {
fit0 <- ppm(cells, ~1, nd=10)
v <- psst(fit0, npfun)
# }
```

*Documentation reproduced from package spatstat, version 1.61-0, License: GPL (>= 2)*

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