Scales

Scales control how data values are converted to visual values: which colours a variable spans, how large points become, and the limits and transformation of the axes.

Usage

orb_scale_colour(palette = "viridis", limits = NULL, reverse = FALSE)

orb_scale_fill(palette = "viridis", limits = NULL, reverse = FALSE)

orb_scale_size(range = c(2, 14), limits = NULL)

orb_scale_x(limits = NULL, trans = "identity", breaks = NULL, expand = 0.04)

orb_scale_y(limits = NULL, trans = "identity", breaks = NULL, expand = 0.04)

Arguments

palette

Palette name (see orb_palettes()) or a character vector of colours to interpolate.

limits

Numeric length-2 vector giving the data range to map, or NULL to use the observed range.

reverse

Reverse the direction of the palette.

range

Length-2 numeric vector giving the smallest and largest radius in pixels, for orb_scale_size().

trans

Axis transformation: "identity" (default), "log10" or "sqrt".

breaks

Numeric vector of axis breaks, or NULL for automatic.

expand

Fraction of the data range added as padding at each end.

Value

An object of class orb_scale, to be added to a plot.

Examples

p <- orb(mtcars, x = wt, y = mpg, colour = hp) + orb_points()
p + orb_scale_colour("magma", reverse = TRUE)
#> <orb_spec>
#>   data:   32 rows x 11 columns
#>   mapping: x, y, colour 
#>   layers:  points 

p + orb_scale_y(limits = c(10, 35))
#> <orb_spec>
#>   data:   32 rows x 11 columns
#>   mapping: x, y, colour 
#>   layers:  points