display a module-by-wave availability matrix

prints a cross-tabulation showing which modules have data available in which waves. uses the cached blueprint if available, otherwise calls liss_blueprint() first.

Usage

liss_wave_matrix()

Value

a data frame (invisibly) with modules as rows and waves as columns. available cells contain a multiplication sign (unicode U+00D7) and missing cells contain a middle dot (unicode U+00B7).

Examples

if (FALSE) { # \dontrun{
liss_wave_matrix()
} # }