tm_scale_ordinal | R Documentation |
Scales in tmap are configured by the family of functions with prefix tm_scale
.
Such function should be used for the input of the .scale
arguments in the
layer functions (e.g. fill.scale
in tm_polygons()
).
The functions tm_scale_categorical()
and tm_scale_ordinal()
are used
for categorical data. The only difference between these functions is that the
former assumes unordered categories whereas the latter assumes ordered categories.
For colors (the visual variable fill
or col
), different default color
palettes are used (see the tmap option values.var
).
tm_scale_ordinal(
n.max = 30,
values = NA,
values.repeat = FALSE,
values.range = 1,
values.scale = NA,
value.na = NA,
value.null = NA,
value.neutral = NA,
levels = NULL,
levels.drop = FALSE,
labels = NULL,
label.na = NA,
label.null = NA,
label.format = list()
)
tm_scale_categorical(
n.max = 30,
values = NA,
values.repeat = TRUE,
values.range = NA,
values.scale = NA,
value.na = NA,
value.null = NA,
value.neutral = NA,
levels = NULL,
levels.drop = FALSE,
labels = NULL,
label.na = NA,
label.null = NA,
label.format = list()
)
n.max |
Maximum number of categories (factor levels). In case there are more, they are grouped into |
values |
(generic scale argument) The visual values. For colors (e.g. |
values.repeat |
(generic scale argument) Should the values be repeated in case there are more categories? |
values.range |
(generic scale argument) Range of the values. Vector of two numbers (both between 0 and 1) where the first determines the minimum and the second the maximum. Full range, which means that all values are used, is encoded as |
values.scale |
(generic scale argument) Scaling of the values. Only useful for size-related visual variables, such as |
value.na |
(generic scale argument) Value used for missing values. See tmap option |
value.null |
(generic scale argument) Value used for NULL values. See tmap option |
value.neutral |
(generic scale argument) Value that can be considered neutral. This is used for legends of other visual variables of the same map layer. E.g. when both |
levels |
Levels to show. Other values are treated as missing. |
levels.drop |
Should unused levels be dropped (and therefore are not assigned to a visual value and shown in the legend)? |
labels |
(generic scale argument) Labels |
label.na |
(generic scale argument) Label for missing values |
label.null |
(generic scale argument) Label for null (out-of-scope) values |
label.format |
(generic scale argument) Label formatting (similar to |
tm_scale()
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.