# Ideal dataset types

The Public Data Explorer works best with data that are:

**Quantitative:**Each data point has one or more numeric metrics associated with it (e.g., "population", "number of flu cases", "revenue").**Categorical:**Data can be organized into a finite number of text-describable categories (e.g., "countries", "genders", "age groups").**Time series:**For each category, the data metrics vary as a function of time, and adjacent points are at least one day apart (the Public Data Explorer cannot visualize time increments smaller than a day).**Aggregated:**For each time / category / metric combination, there is a*single*data point, not a list of events or facts.

In particular, note that unaggregated "fact" or "event" data may be importable, but will not produce interesting visualizations.