Stolen from here
seq_range(x, n, by, trim = NULL, expand = NULL, pretty = FALSE)A numeric vector
Specify the output sequence either by supplying the
length of the sequence with n, or the spacing between value
with by. Specifying both is an error.
I recommend that you name these arguments in order to make it clear to the reader.
Optionally, trim values off the tails.
trim / 2 * length(x) values are removed from each tail.
Optionally, expand the range by expand * (1 + range(x)
(computed after trimming).
If TRUE, will generate a pretty sequence. If n
is supplied, this will use pretty() instead of
seq(). If by is supplied, it will round the first
value to a multiple of by.
x <- rcauchy(100)
seq_range(x, n = 10)
#> [1] -19.848696 -10.276227 -0.703758 8.868711 18.441180 28.013649
#> [7] 37.586118 47.158587 56.731055 66.303524
seq_range(x, n = 10, trim = 0.1)
#> [1] -3.2910771 -1.9056950 -0.5203130 0.8650691 2.2504511 3.6358331
#> [7] 5.0212152 6.4065972 7.7919792 9.1773613
seq_range(x, by = 1, trim = 0.1)
#> [1] -3.2910771 -2.2910771 -1.2910771 -0.2910771 0.7089229 1.7089229
#> [7] 2.7089229 3.7089229 4.7089229 5.7089229 6.7089229 7.7089229
#> [13] 8.7089229
# Make pretty sequences
y <- runif (100)
seq_range(y, n = 10)
#> [1] 0.001844012 0.112403835 0.222963657 0.333523479 0.444083301 0.554643123
#> [7] 0.665202946 0.775762768 0.886322590 0.996882412
seq_range(y, n = 10, pretty = TRUE)
#> [1] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
seq_range(y, n = 10, expand = 0.5, pretty = TRUE)
#> [1] -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
seq_range(y, by = 0.1)
#> [1] 0.001844012 0.101844012 0.201844012 0.301844012 0.401844012 0.501844012
#> [7] 0.601844012 0.701844012 0.801844012 0.901844012
seq_range(y, by = 0.1, pretty = TRUE)
#> [1] 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0