How to build a Sankey diagram without any data prep beforehand By Ian Baldwin

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First of all I want to say this post is hugely indebted to Olivier Catherin and his post four years ago on building Sankeys in Tableau and Jeff Schaffer whose work Olivier built off and
countless others I probably don’t even realise.This post sets out how to build a Sankey Diagram without any data prep before Tableau. The viz below is built off the vanilla Superstore data
packaged with Tableau, but I must warn you there’s a labyrinth of table calculations to get to this point.There are 20 calculations to get through to get to this stage so what makes it worth it? All previous solutions I’ve seen for building Sankeys have needed to multiply the size of the data by at least a factor of two beforehand.

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