Return the First or Last Parts of an Object

Returns the first or last parts of a vector.

Usage

# S3 method for class 'spherical'
head(x, n = 6L, ...)

# S3 method for class 'spherical'
tail(x, n = 6L, ...)

Arguments

x

objects of class "Vec3", "Line", "Plane", "Pair", or "Fault

n

an integer vector of length up to dim(x) (or 1, for non-dimensioned objects). A logical is silently coerced to integer. Values specify the indices to be selected in the corresponding dimension (or along the length) of the object. A positive value of n[i] includes the first/last n[i] indices in that dimension, while a negative value excludes the last/first abs(n[i]), including all remaining indices. NA or non-specified values (when length(n) < length(dim(x))) select all indices in that dimension. Must contain at least one non-missing value.

...

arguments to be passed to or from other methods.

Examples

x <- rvmf(n = 10)
head(x)
#> Vector (Vec3) object (n = 6):
#>              x           y           z
#> [1,] 0.9194460  0.07680528 -0.38564221
#> [2,] 0.8944839  0.29503629 -0.33593484
#> [3,] 0.7650453  0.63719963  0.09317877
#> [4,] 0.6598253  0.06208816  0.74884950
#> [5,] 0.9500657 -0.07762652 -0.30224032
#> [6,] 0.8170436 -0.03978027  0.57520197
tail(x)
#> Vector (Vec3) object (n = 6):
#>              x           y           z
#> [1,] 0.9500657 -0.07762652 -0.30224032
#> [2,] 0.8170436 -0.03978027  0.57520197
#> [3,] 0.6663839  0.74429159  0.04430004
#> [4,] 0.8913334  0.15888109 -0.42459586
#> [5,] 0.8677729 -0.25526040 -0.42639448
#> [6,] 0.9878350 -0.11979314  0.09915423