At times, it is useful to contrast maps visuals for different data segments. For example, you can trellis on different calendar years.
The following steps demonstrate how to create a new trellised map on dataset Air Quality US Cities
[data source samples.air_quality_over_time
].
year
and drag it over X shelf on the main part of the screen.year
field, and select Pick values from list. In the Pick values for year modal window, select 1990, 1995, and 2000, and then click Save.
Click Refresh Visual.
The new trellised maps appear.
Click (pencil icon) next to the title of the visualization to edit it, and enter the new name.
US Air Quality by Latitude and Longitude, Yearly
.At the top left corner of the Visual Designer, click Save.