Grouped diverging chart for a scale's Likert items

Several separate Likert items that make up one sf_scale() (unlike a "matrix" item's rows, which are one question) are, by default, each reported as their own single-item diverging chart. That scatters a related batch of items (a satisfaction scale's 2-3 items, say) across several charts instead of showing them the way a Likert matrix or a typical multi-item satisfaction grid is reported: one grouped chart, one diverging bar per item, sharing an x scale and a legend. Applies only when every item in the scale shares the same choice set. Scales that mix response scales fall back to one chart per item.

Usage

sframe_plot_likert_scale(
  items,
  data,
  choice_set,
  title,
  palette = c("web", "print")
)

Arguments

items

A list of "likert" sframe items belonging to one scale, in display order.

data

The response data.frame, with one column per item id.

choice_set

The shared choice set object (values, labels).

title

Chart title, typically the scale's label.

palette

One of "web" or "print". See sframe_brand().

Value

A ggplot2 object, or NULL if no item has response data.

See also

sframe_plot_likert_matrix(), sf_scale()