Hi, I will show you an example of filtering sub category from selecting category through parameter.
Follow below steps:
1. Add a parameter with required field.
2. Add a calculated field to select the values from parameter into a new field.
3. Now add the created field into filter shelf.
4. Now when a parameter is selected, filter values would change wrt parameter.
See below 2 images for example.
Hope this helps you.
If you wish to learn all the concepts of tableau with hands-on experience then check out Tableau Training Course details now!.