Make sure you’re logged into the Animals Starter File in CODAP. Select the Plugins icon, then choose Transformers.
Create, Apply, and Save a Filter Transformer (Step by Step)
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1 Choose Filter from the drop-down menu that appears (Box 1).
2 Name the Transformer
3 Click on "Dataset to Filter" to confirm that the Animals Dataset is selected.
4 The Contract’s Domain is Row. Why does that makes sense?
5 The Range - is Boolean. Why does that make sense?
6 What Purpose Statement will you type into Box 6? |
7 Enter Species = "dog" as the expression (Box 7). Select Apply Transformer. What happens?
8 Try typing species = "dog" as the expression (instead of Species = "dog"). What happens?
9 What are some other possible reasons you might get an error message for the expression?
10 Select "Save Transformer." Describe what happens. Why might it be useful to save a Transformer?
More Filtering (On Your Own)
11 Create, save, and apply a Transformer called filter-is-old that creates a new dataset with animals older than 5 years.
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How many rows does the resulting table have?
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How many datasets appeared in the drop-down menu for you to choose from?
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Which dataset did you choose and why?
12 Create, save, and apply a Transformer called filter-is-fixed that creates a new dataset with only fixed animals.
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How many fixed animals are there at the shelter?
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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