The methods used to summarise the distribution of values for a categorical variable are different from those used for numerical variables. The simplest of these is a frequency table.
Rice survey
Examining one variable from many
In surveys like the rice survey above, several measurements are often recorded from each participant. Although in-depth analysis of the data would investigate the relationships between the variables, it is often useful to examine the distributions of the variables one-at-a-time.
Rice survey