Parallel coordinates plot of a DEA problem

Draws a parallel-coordinates plot with one axis per input and output, each axis min-max scaled to [0, 1] so they are comparable. Each DMU is one line; lines are coloured by efficient/inefficient status.

Usage

plot_io_parcoo(
  x,
  variables = "all",
  efficiency = c("crs", "vrs", "none"),
  orientation = "in",
  labels = "none",
  max.overlaps.value = 10,
  transparency = 0.7,
  fade = TRUE,
  x_angle = NULL,
  subtitle = NULL,
  title = NULL,
  interactive = FALSE,
  ...
)

Arguments

x

A dea_data object, or a data frame coerced by as_dea_data.

variables

Which variables to show: "all" (default), "inputs", "outputs", or a vector of variable names or positions (positions index the inputs followed by the outputs).

efficiency

Efficiency model used to colour the lines by efficient/inefficient status: "crs" (default), "vrs" or "none".

orientation

Measurement orientation for the efficiency scores, passed to compute_efficiency (default "in").

labels

Which DMUs to label at the right-hand axis: "none" (default), "all", "max.overlaps", or the name/id of a single DMU (also highlights that DMU's line).

max.overlaps.value

Passed to ggrepel when labels = "max.overlaps" (default 10).

transparency

Opacity of the markers/areas, a single number in [0, 1] (default 0.7).

fade

Controls the single-DMU focus view. When one DMU is given to labels, all other marks (and, for the network plots, everything outside that DMU's sub-network; for the panel biplot, the other trajectories) are faded so the chosen DMU stands out. TRUE (default) uses a sensible fade level; FALSE disables it; a single number in [0, 1] sets the alpha of the faded marks directly, where larger values fade them less (e.g. 0.4 leaves them more visible).

x_angle

Angle in degrees for the x-axis tick labels, useful when the input/output (or DMU) names on the x-axis are long and overlap. NULL (default) keeps the plot's standard orientation; for example x_angle = 45 tilts the labels to make them readable.

subtitle

Optional subtitle shown beneath the title.

title

Optional plot title.

interactive

Logical; static ggplot2 (default) or interactive plotly.

...

Additional arguments passed to geom_line.

Value

A ggplot2 object, or a plotly object when interactive = TRUE.

See also

compute_efficiency, plot_io_radar

Examples

df <- data.frame(
  dmu  = paste0("D", 1:6),
  i_x1 = c(4, 7, 8, 4, 2, 5),
  i_x2 = c(3, 3, 1, 2, 4, 2),
  o_y  = c(5, 8, 6, 7, 3, 9)
)
plot_io_parcoo(df, efficiency = "crs")