I’m currently working with a dataset containing a list of chemical compounds categorized into three groups: weak, strong, and non. I want to generate a heatmap, but since this column is not numerical, I need to transform it into numbers, e.g. strong = 2, weak = 1, and non = 0. I know I can use the Engine Rule node for that, but I never used that before. It would be great if someone could help me define the rules I need.