Plot item support by wave. — plot

Computes group-wise percent support for selected items and plots a heatmap. Note: max value in each question column is treated as "support" value.

Usage

plot_support(
  data,
  wave_col = NULL,
  weight_col = NULL,
  group_col = NULL,
  facet_by = c("variable", "group_col"),
  ques_cols = NULL,
  ques_stem = NULL,
  show_labels = TRUE
)

Arguments

data: Data frame containing the survey items.
wave_col: Column with wave identifiers (e.g., year); if missing, make bar plots.
weight_col: Weight column; if missing, equal weights are used.
group_col: Grouping column; if missing, uses a single "all" group.
facet_by: Whether to facet by variable or group.
ques_cols: Optional character vector of question columns to include.
ques_stem: Optional vector of substrings used to match columns.
show_labels: Logical; draw percentage labels on tiles.

Value

ggplot object.