# rSSI

From spatstat v1.27-0
by Adrian Baddeley

##### Simulate Simple Sequential Inhibition

Generate a random point pattern, a realisation of the Simple Sequential Inhibition (SSI) process.

##### Usage

`rSSI(r, n, win = owin(c(0,1),c(0,1)), giveup = 1000, x.init=NULL)`

##### Arguments

- r
- Inhibition distance.
- n
- Number of points to generate.
- win
- Window in which to simulate the pattern.
An object of class
`"owin"`

or something acceptable to`as.owin`

. - giveup
- Number of rejected proposals after which the algorithm should terminate.
- x.init
- Optional. Initial configuration of points. A point pattern
(object of class
`"ppp"`

).

##### Details

This algorithm generates a realisation of the Simple Sequential
Inhibition point process
inside the window `win`

.

Starting with an empty window (or with the point pattern `x.init`

if specified), the algorithm adds points
one-by-one. Each new point is generated uniformly in the window
and independently of preceding points. If the new point lies
closer than `r`

units from an existing point, then it is rejected
and another random point is generated.

The algorithm terminates either when the desired number `n`

of points is reached, or when the current point configuration
has not changed for `giveup`

iterations.

##### Value

- The simulated point pattern (an object of class
`"ppp"`

).

##### See Also

##### Examples

```
pp <- rSSI(0.05, 200)
plot(pp)
```

*Documentation reproduced from package spatstat, version 1.27-0, License: GPL (>= 2)*

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