Plot Individual Trajectories

Creates an alluvial-style diagram where each individual's trajectory is shown as a separate line. This is an alias for plot_transitions() with track_individuals = TRUE.

Usage

plot_trajectories(
  x,
  from_title = NULL,
  title = NULL,
  from_colors = NULL,
  flow_color_by = "first",
  node_width = 0.08,
  node_border = NA,
  node_spacing = 0.02,
  label_size = 3.5,
  label_position = c("beside", "inside", "above", "below", "outside"),
  mid_label_position = NULL,
  label_halo = TRUE,
  label_color = "black",
  label_fontface = "plain",
  label_nudge = 0.02,
  title_size = 5,
  title_color = "black",
  title_fontface = "bold",
  curve_strength = 0.6,
  line_alpha = 0.3,
  line_width = 0.5,
  jitter_amount = 0.8,
  show_totals = FALSE,
  total_size = 4,
  total_color = "white",
  total_fontface = "bold",
  show_values = FALSE,
  value_position = c("center", "origin", "destination"),
  value_size = 3,
  value_color = "black",
  value_halo = NULL,
  value_fontface = "bold",
  value_nudge = 0.03,
  value_min = 0,
  value_digits = 2,
  column_gap = 1,
  proportional_nodes = TRUE,
  node_label_format = NULL,
  bundle_size = NULL,
  bundle_legend = TRUE,
  bundle_legend_size = 3,
  bundle_legend_color = "grey50",
  bundle_legend_fontface = "italic",
  bundle_legend_position = c("bottom", "top")
)

Arguments

x

Input data in one of several formats:

A transition matrix (rows = from, cols = to, values = counts)
Two vectors: pass before as x and after as second argument (contingency table computed automatically, like chi-square)
A 2-column data frame (raw observations; table computed automatically)
A data frame with columns: from, to, count
A list of matrices for multi-step transitions

from_title

Title for the left column. Default "From". For multi-step, use a vector of titles (e.g., c("T1", "T2", "T3", "T4")).

title

Optional plot title. Applied via ggplot2::labs(title = title).

from_colors

Colors for left-side nodes. Default uses palette.

flow_color_by

Color flows by "source", "destination", or NULL (use flow_fill). Default NULL.

node_width

Width of node rectangles (0-1 scale). Default 0.08.

node_border

Border color for nodes. Default NA (no border).

node_spacing

Vertical spacing between nodes (0-1 scale). Default 0.02.

label_size

Size of node labels. Default 3.5.

label_position

Position of node labels: "beside" (default), "inside", "above", "below", "outside". Applied to first and last columns. See mid_label_position for middle columns.

mid_label_position

Position of labels for intermediate (middle) columns. Same options as label_position. Default NULL uses label_position value.

label_halo

Logical: add white halo around labels for readability? Default TRUE.

label_color

Color of state name labels. Default "black".

label_fontface

Font face of state name labels ("plain", "bold", "italic", "bold.italic"). Default "plain".

label_nudge

Distance between node edge and label (in plot units). Default 0.02. Increase for more spacing.

title_size

Size of column titles. Default 5.

title_color

Color of column title text. Default "black".

title_fontface

Font face of column titles. Default "bold".

curve_strength

Controls bezier curve shape (0-1). Default 0.6.

line_alpha

Alpha for individual tracking lines. Default 0.3.

line_width

Width of individual tracking lines. Default 0.5.

jitter_amount

Vertical jitter for individual lines (0-1). Default 0.8.

show_totals

Logical: show total counts on nodes? Default FALSE.

total_size

Size of total labels. Default 4.

total_color

Color of total labels. Default "white".

total_fontface

Font face of total labels. Default "bold".

show_values

Logical: show transition counts on flows? Default FALSE.

value_position

Position of flow values: "center", "origin", "destination", "outside_origin", "outside_destination". Default "center".

value_size

Size of value labels on flows. Default 3.

value_color

Color of value labels. Default "black".

value_halo

Logical: add halo around flow value labels? Default NULL (inherits from label_halo).

value_fontface

Font face of flow value labels. Default "bold".

value_nudge

Distance of value labels from node edge when using "origin" or "destination" positions. Default 0.03.

value_min

Minimum count to show a flow value label. Default 0 (show all). Use to hide small flows (e.g., value_min = 100).

value_digits

Number of decimal places for flow value labels and node totals. Default 2.

column_gap

Horizontal spread of columns (0-1). Default 1 uses full width. Use smaller values (e.g., 0.6) to bring columns closer together.

proportional_nodes

Logical: size nodes proportionally to counts? Default TRUE.

node_label_format

Format string for node labels with {state} and {count} placeholders. Default NULL (plain state name). Example: "{state} (n={count})".

bundle_size

Controls line bundling for large datasets. Default NULL (no bundling). Integer >= 2: each drawn line represents that many cases. Numeric in (0,1): reduce to this fraction of original lines (e.g., 0.15 keeps about 15 percent of lines).

bundle_legend

Logical or character: show annotation when bundling is active? Default TRUE shows "Each line ~ N cases" below the plot. Pass a string to use custom text (with {n} placeholder for count).

bundle_legend_size

Size of the bundle legend text. Default 3.

bundle_legend_color

Color of the bundle legend text. Default "grey50".

bundle_legend_fontface

Font face of the bundle legend text. Default "italic".

bundle_legend_position

Position of the bundle legend: "bottom" (default) or "top".

Value

A ggplot2 object.

Examples

if (FALSE) { # \dontrun{
# Track individual trajectories across time points
df <- data.frame(
  Baseline = c("Light", "Light", "Intense", "Resource"),
  Week4 = c("Light", "Intense", "Intense", "Light"),
  Week8 = c("Resource", "Intense", "Light", "Light")
)
plot_trajectories(df, flow_color_by = "first")
} # }

Usage

Arguments

Value

See also

Examples