# Multiple filters

To filter by two or more values of a variable

Specify those values in one Filter box.

example A Morris water maze experiment contains a number of trials of different type, either training or probe. Training trials are marked with t1, t2, etc. according to their position in a sequence, using the user-defined variable Trial type. You want to analyze the tracks for type t1 and t2, not probes (p).

1.Create a Filter box corresponding to the filtering variable.

2.Specify the values of the variable.

3.Insert the Filter box in the sequence.

To filter by two or more variables

Create one box per variable.

Connect them between the Start box and the Result box using the logic you require. See Basic rules for combining selection boxes.

example Your experiment contains a number of tracks recorded for two groups of subjects, Young and Aged, and on a variable number of days after the treatment. You want to calculate the statistics for the Young subjects, and for the Day 1 after the treatment.

We assume here that Group and Day have been entered as user-defined variables. Since the selection criteria depend on different variables, place the Filter boxes one after the other; which comes first does not matter.