- Keywords: Missing values, Visualisation, Sorting
- TL;DR: Visualise missing value patterns of large datasets using visna plots with sorting and filtering.
- Abstract: Identifying patterns of missing values in large datasets is difficult. The visna plot is a matrix visualisation with variables in the columns and patterns of missing values in the rows. Both rows and columns can be sorted and filtered. Visna is a powerful graphical tool for exploratory analysis.