Formulas are used throughout Fathom for a variety of purposes. Any time you create or edit a formula, you use the same formula editor interface. You can use formulas to do the following:
Use a formula to ... |
Example |
Determine the values of a new attribute. |
Define an attribute, PopulationDensity, and give it the formula Population |
Define a filter. |
Enter the formula sex |
Summarize data. |
To summarize student heights, enter the formulas |
Define a statistic. |
To compare tomato plants grown in sunny locations with those grown in shady locations, enter this formula: |
Control a simulation. |
Suppose you wanted to throw dice until there were 2 sixes. You would use an "until" command in the Collect Measures panel of a measures collection inspector with the formula |
Compute a slider value. |
To make a slider that will choose a random integer between 1 and 100 each time its animation button is pressed, give it the formula |
With formulas, you don't simply choose from a list of statistics or filters or simple computations. You can compute practically anything you want, as long as you know how to express it.
See Fathom Operators, Functions, and Units for a complete list of the functions available in Fathom.
Key Curriculum Press/Key College Publishing www.keypress.com/fathom |