Creates a data frame with information on each quadtree cell.
# S4 method for Quadtree
as_data_frame(x, terminal_only = TRUE)Arguments
- x
a
Quadtree- terminal_only
boolean; if
TRUE(the default) only information on terminal cells is returned. IfFALSE, information on all cells is returned.
Value
A data frame with one row for each quadtree cell. The columns are as follows:
id: the id of the cellhasChildren: 1 if the cell has children, 0 otherwiselevel: integer; the depth of this cell/node in the quadtree, where the root of the quadtree is considered to be level 0xmin,xmax,ymin,ymax: the x and y limits of the cellvalue: the value of the cellsmallestChildLength: the smallest cell length among all of this cell's descendantsparentID: the ID of the cell's parent. The root, which has no parent, has a value of -1 for this column
See also
as_vector() returns all the cell values as a numeric
vector.
Examples
library(quadtree)
mat <- rbind(c(1, 1, 0, 1),
c(1, 1, 1, 0),
c(1, 0, 1, 1),
c(0, 1, 1, 1))
qt <- quadtree(mat, .1)
plot(qt)
as_data_frame(qt)
#> id hasChildren level xmin xmax ymin ymax value smallestChildLength parentID
#> 2 1 0 1 0 2 2 4 1 2 0
#> 4 3 0 2 2 3 3 4 0 1 2
#> 5 4 0 2 3 4 3 4 1 1 2
#> 6 5 0 2 2 3 2 3 1 1 2
#> 7 6 0 2 3 4 2 3 0 1 2
#> 9 8 0 2 0 1 1 2 1 1 7
#> 10 9 0 2 1 2 1 2 0 1 7
#> 11 10 0 2 0 1 0 1 0 1 7
#> 12 11 0 2 1 2 0 1 1 1 7
#> 13 12 0 1 2 4 0 2 1 2 0