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If you want to create data visualizations, Tableau is an amazing tool. With a few mouse clicks you can create anything from a bar chart to a heat map. The graphics it produces are beautiful and you don’t need to know any programming. Plus, if you don’t mind your work being public, it’s available at no cost. But these advantages come at a price. Tableau is not a full-featured programming language, it is primarily a tool for visualization. You can do some calculations within Tableau, but you will eventually need to solve a problem that it just can’t handle. In addition, everything you do in Tableau is done through mouse clicks. This makes it difficult to create a record of what you have done, and very difficult for someone else to duplicate your work.