# Add space-time points to a stpp object

### Description

This function adds new points to a `stpp`

object.

### Usage

1 | ```
add.stpoints(X, points)
``` |

### Arguments

`X` |
A space-time object of class “ |

`points` |
A vector, data frame, matrix or list of points to be added to |

### Details

`points`

can be a vector of length three describing one x, y, and t coordinate, or a matrix or data frame where the first column is a column of x coordinates, the second column is a column of y coordinates, and the third column is a column of t coordinates. If `points`

is a list, the first entry is a vector of x coordinates, the second entry is a vector of y coordinates, and the third entry is a vector of t coordinates.

### Value

`add.stpoints`

returns an object of class “`stpp`

”.

### Author(s)

Robert Clements

### See Also

`stpp`

### Examples

1 2 3 4 5 6 7 8 9 10 11 12 13 | ```
#===> create a stpp object <===#
x <- rnorm(30, mean = 10, sd = 1)
y <- rnorm(30, mean = 100, sd = 10)
t <- runif(30, 0, 100)
stw <- stwin(xcoord = c(0, 20), ycoord = c(50, 150), tcoord = c(0, 100))
X <- stpp(x, y, t, stw = stw)
#===> add new points to X <===#
x.new <- rnorm(10, mean = 10, sd = 1)
y.new <- rnorm(10, mean = 100, sd = 10)
t.new <- runif(10, 0, 100)
all.new <- data.frame(cbind(x.new, y.new, t.new))
Y <- add.stpoints(X, all.new)
``` |