Functions that work with coordinates.
x_corner(dimension, extent = NULL)
y_corner(dimension, extent = NULL)
x_centre(dimension, extent = NULL)
y_centre(dimension, extent = NULL)
x_from_col(dimension, extent = NULL, col)
y_from_row(dimension, extent = NULL, row)
col_from_x(dimension, extent = NULL, x)
row_from_y(dimension, extent = NULL, y)
xy(dimension, extent = NULL)integer ncol, nrow
numeric extent xmin,xmax,ymin,ymax
column index
row index
x coordinate
y coordinate
x coordinate of corners
y coordinate of corners
x coordinate of centres
y coordinate of centres
x coordinate of col (centre)
y coordinate of row (centre)
col of x coordinate
y coordinate (centre) of row
xy coordinate (centre) of grid
x_corner(c(10, 5), c(0, 10, 0, 5))
#> [1] 0 1 2 3 4 5 6 7 8 9 10
y_corner(c(10, 5), c(0, 10, 0, 5))
#> [1] 0 1 2 3 4 5
x_centre(c(10, 5), c(0, 10, 0, 5))
#> [1] 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5
y_centre(c(10, 5), c(0, 10, 0, 5))
#> [1] 0.5 1.5 2.5 3.5 4.5
x_from_col(c(10, 5), c(0, 10, 0, 5), 2:3)
#> [1] 1.5 2.5
y_from_row(c(10, 5), c(0, 10, 0, 5), 2:3)
#> [1] 3.5 2.5
col_from_x(c(10, 5), c(0, 10, 0, 5), 3.5 + 1:2)
#> [1] 5 6
row_from_y(c(10, 5), c(0, 10, 0, 5), 2:3)
#> [1] 4 3
xy(c(10, 5), c(0, 10, 0, 5))
#> x y
#> [1,] 0.5 4.5
#> [2,] 1.5 4.5
#> [3,] 2.5 4.5
#> [4,] 3.5 4.5
#> [5,] 4.5 4.5
#> [6,] 5.5 4.5
#> [7,] 6.5 4.5
#> [8,] 7.5 4.5
#> [9,] 8.5 4.5
#> [10,] 9.5 4.5
#> [11,] 0.5 3.5
#> [12,] 1.5 3.5
#> [13,] 2.5 3.5
#> [14,] 3.5 3.5
#> [15,] 4.5 3.5
#> [16,] 5.5 3.5
#> [17,] 6.5 3.5
#> [18,] 7.5 3.5
#> [19,] 8.5 3.5
#> [20,] 9.5 3.5
#> [21,] 0.5 2.5
#> [22,] 1.5 2.5
#> [23,] 2.5 2.5
#> [24,] 3.5 2.5
#> [25,] 4.5 2.5
#> [26,] 5.5 2.5
#> [27,] 6.5 2.5
#> [28,] 7.5 2.5
#> [29,] 8.5 2.5
#> [30,] 9.5 2.5
#> [31,] 0.5 1.5
#> [32,] 1.5 1.5
#> [33,] 2.5 1.5
#> [34,] 3.5 1.5
#> [35,] 4.5 1.5
#> [36,] 5.5 1.5
#> [37,] 6.5 1.5
#> [38,] 7.5 1.5
#> [39,] 8.5 1.5
#> [40,] 9.5 1.5
#> [41,] 0.5 0.5
#> [42,] 1.5 0.5
#> [43,] 2.5 0.5
#> [44,] 3.5 0.5
#> [45,] 4.5 0.5
#> [46,] 5.5 0.5
#> [47,] 6.5 0.5
#> [48,] 7.5 0.5
#> [49,] 8.5 0.5
#> [50,] 9.5 0.5