For a continuous vector `x`

, `evenly`

and `seq_min_max()`

create a sequence of `n`

evenly-spaced values over the range `lower`

– `upper`

. By default, `lower`

is defined as `min(x)`

and `upper`

as
`max(x)`

, excluding `NA`

s. For a factor `x`

, the function returns
`levels(x)`

.

## Usage

```
evenly(x, n = 100, by = NULL, lower = NULL, upper = NULL)
seq_min_max(x, n, by = NULL, lower = NULL, upper = NULL)
```

## Arguments

- x
numeric; vector over which evenly-spaced values are returned

- n
numeric; the number of evenly-spaced values to return. A default of

`100`

is used for convenience as that what is typically used when evaluating a smooth.- by
numeric; the increment of the sequence. If specified, argument

`n`

is ignored and the sequence returned will be from`min(x)`

to`max(x)`

in increments of`by`

.- lower
numeric; the lower bound of the interval.

- upper
numeric; the upper bound of the interval.

## See also

See `base::seq()`

for details of the behaviour of `evenly()`

when
using `by`

.

## Examples

```
x <- rnorm(10)
n <- 10L
# 10 values evenly over the range of `x`
evenly(x, n = n)
#> [1] -0.83562861 -0.56552757 -0.29542652 -0.02532547 0.24477557 0.51487662
#> [7] 0.78497766 1.05507871 1.32517976 1.59528080
# evenly spaced values, incrementing by 0.2
evenly(x, by = 0.2)
#> [1] -0.83562861 -0.63562861 -0.43562861 -0.23562861 -0.03562861 0.16437139
#> [7] 0.36437139 0.56437139 0.76437139 0.96437139 1.16437139 1.36437139
#> [13] 1.56437139
# evenly spaced values, incrementing by 0.2, starting at -2
evenly(x, by = 0.2, lower = -2)
#> [1] -2.0 -1.8 -1.6 -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8
#> [16] 1.0 1.2 1.4
```