Filters can dynamically affect the Power BI heatmap through both the Matrix or the Table visual, one that uses conditional formatting and DAX measures to relay the data intensity according to filter selections on dates, categories, or regions.
Best Approach
Pick Matrix or Table Visual
Use a matrix for data representation in a grid fashion (for example, regions go into rows and products into columns).
Add your value measure (e.g., Sales, Count) to Values.
Develop DAX Measure for Dynamic Calculation
Define a measure that responds to slicers/filters:
Total Sales = SUM(Sales[Amount])
Applying Conditional Formatting
Select your Matrix → Go to Values > Conditional Formatting > Background color.
Choose a Color scale, then assign a gradient (e.g., light to dark blue).
Power BI automatically adapts the scale based on filtered data unless you fix min/max.
Set All Slicers and Filters
Add slicers for Date, Category, Region, etc.
The Matrix and formatting will update based on user selections.