The wind chill calculations that are used currently in the US, Canada, and the UKĪre based on a 2001 revision of an earlier wind chill table. You can use the techniques in this article to visualize any response surface. This article describes how to use SAS to create line charts and heat maps that visualize the formula.įor the heat map, I show how to overlay numerical values and to choose colors for the numbers so that the text is more readable.Īn example of a wind chill chart is shown below. The formula uses two independent variables (air temperature and wind speed) to predict the wind chill temperature. I recently wrote about a simple statistical formula that approximates the wind chill temperature, which is the cumulative effect of air temperature and wind on the human body.