Briefly |
Choose Summary Table from the Insert menu. Then drag attributes to the top or side of the table. If you want to compute different quantities, choose Add Formula from the Summary menu. |
A summary table gives you summary information about a collection, for example, the mean and median of a numeric attribute or counts for the various categories in a categorical attribute. (About continuous and categorical attributes)
To make a summary table work, first you have to make one, then you have to tell it what to summarize.
1. To make a new, empty summary table, choose Summary Table from the Insert menu or drag the summary table icon off the shelf.
2. Drag an attribute name from an Inspector or from the column header in a Case Table to the top or side of the table.
we dragged sex to the left |
Then we dragged age to the top |
What are the arrows for?
When you drag a new attribute on top of an old one, it replaces the old attribute. To add an additional attribute to the table, drag it onto an arrow.
I want the median, not the mean!
To change what's being computed, double-click on the formula at the bottom or bring up its contextual menu and choose Edit Formula.
To compute additional quantities, choose Add Formula from the Summary menu. The Formula Editor appears; you can write any formula you like there. If you use aggregate functions and leave the arguments blank, the Summary Table will summarize the attribute(s) you dragged to the column or row header.