Reshapes the plot data so that the selected columns become parallel vertical axes. Each observation is drawn as a polyline connecting its values across all axes. Values are optionally normalised per column to share a common 0-1 scale.
Usage
project_parallel(
plot,
columns,
group = NULL,
scale = c("std", "global", "none"),
alpha = 0.5,
size = 1,
clip = "on",
...
)Arguments
- plot
A plotit object.
- columns
Character vector of column names to use as parallel axes. Order matters: the first column is the leftmost axis.
- group
Column name for colouring lines.
NULL= no grouping.- scale
"std"(default): min-max normalise each column to 0-1."global": min-max normalise across all columns to 0-1."none": no normalisation, each column keeps its own range.- alpha, size
Passed to
geom_line()/geom_point().- clip
Currently unused (parallel coordinates do not apply a coordinate system). Accepted for signature consistency.
- ...
Passed to
geom_line().
