How do I use the Subset analysis tool?
To select the subset tool, locate the Analyze and Subset Tool on the Study Description page. Click on the "Subset" option.
Using the Select Variable(s) for Subsetting dropdown list, pick the variables that will define your subset. The variable name you selected will appear with another dropdown menu. Select a subcategory of the variable from the dropdown menu to define your subset. In this example, we are choosing only Black respondents. You must also choose a statistical software package to which the data definition statements will be written.
Multiple variables can be used to define the subset, as in the following example where we choose a sample of Black respondents who are under 18 years of age.
Additional variables can be added to the selection criteria by clicking the "Add Variables" button. Your previous choices will continue to be displayed. Highlight the subgroup of interest and click the "Subset Data" button.
Output from the subsetting procedure will be displayed on a subsequent page. For large files, the process may take a few minutes. The page will display as follows:
Variable and case counts will be displayed at the top of the page. The data file will be in compressed ASCII format (a file compression feature will be added soon). The codebook and data definition statements will be text format. Please save these files to your own computer as soon as possible. If the download times out or fails to load please contact us at firstname.lastname@example.org.
To analyze the subset, you will need to run the data definition statement in your statistical software of choice. You must change the data file's pathname to a location on your own computer.