After configuring the cascading filters, you can test how the filter selections
interact.
In this example, there are 39 possible categories of police incidents distributed
across 10 policing districts.
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Open the dashboard in View mode.
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Use the first application filter, datetime, to limit the date
range to the 2010 calendar year. Start on 2010-01-01, end with 2010-12-31.
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Click APPLY.
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In the second filter, category, select the value
BAD
CHECKS.
In the third filter, pddistrict, you can see that the value for
PARK is missing. There are only 9 policing districts available in the
filter.
This is the result of filtering based on category BAD CHECK and date
range 2010-01-01 through 2010-12-31. The resulting
subset of data in the dataset does not include rows where pddistrict
equals PARK.
If you select another date range, such as years 2008 through 2014, all 10 districts
show up on the pddistrict filter.
