How do I get a gradient background in graph builder
I want to create a scatter plot with 9 squares that looks like a McKinsey GE matrix, and plot data points in those squares. If the bottom left equals the lowest values and top right the highest value, I would like to have a gradient diagonal background, starting with red in the lower left corner and green in the top right with a yellow band in the middle (see attached jpg). In excel I can do this ...