Step 1: You can create an Excel Spreadsheet with the table exactly as you provided above, but rename the different D* instances by adding a, b and c as required. Save the excel spreadsheet.
Step 2: Open Tableau and connect to the Excel file
Step 3: Select columns D1a to D3c
Step 4: You need to hover your mouse and click on the drop down arrow and select pivot
Step 5: Now, Double click on F1, Pivot field names and Pivot field values and rename as appropriate. Note the slight variations in the names.
Step 6: Change the data type for correlation coefficients. Click on Abc and change as shown. Click on Sheet 1 when you are done.
Step 7: Now, Right click on Correlation Coefficients and click Convert to measure.
Step 8: As shown in the image, drag the different D* fields to the row and column shelves Drag Correlation Coefficients onto the Color Marks card.
Step 9: As shown in the image, Click on “Abc” at the top. Hover your mouse and click on the drop down arrow and Edit colors.
Step 10: Choose the options shown below. Feel free to use this format if you wish.
Step 11: Click on the end member green color and select the lighter green color as shown. Deselect “Use Full Color Range”. Click OK.
Step 12: Format the Correlation Coefficients as shown.
Step 13: You are done with building your Tableau visualization.