Pie charts

Pie Charts are the simplest of the four chart types used in our system. Unlike scatter, bar, or line charts, our pie charts show just one series of data at a time.

You can select to display any attribute from your list that is numeric. In addition, you can display a count of any kind of attribute, be it text, number, or date. The count means that the wedge of the pie represented by a particular value is sized based on the total number of matching records. This is in contrast to the numeric pie wedges, which are based on the value of the record.

You can also choose to group records based on any attribute. That is, records with matching values for the grouped attribute will be placed together.

If you choose to group, you have additional options for displaying your values when you have a numerical display attribute. In that case, you must select between showing the minimum record value, maximum record value, sum of record values, average value, or simply a count of the matching records.

For non-numeric attributes, there is only an option to see a count.

Furthermore, you can filter by a selected factor. You can do this by selecting "where" instead of "of all records" from the menu next to the grouping selection. This will limit the data displayed to the criteria you add.

Users can filter by any kind of attribute. For example, for text, you can filter by exact matches or by records containing a string. Numbers can be filtered by records above, below, matching, or between a user specified amount.

You can also filter by date and filter by records before, after, matching, or between a certain date. The widget to do this is a calendar and can be moved forward or backward in time by the day, month, or year.

Keep in mind that the number of wedges in a pie chart will affect the performance. You will get a warning at 250 wedges and the system will not draw a chart with more than 1000.

Like all other charts. Pie charts can be saved as a snapshot and viewed again later, or used to make new chart visualizations. Just click "save snapshot" at the top of the page.