How to add a 45 degrees reference line in Tableau

How to add a 45 degrees reference line in Tableau

When you’re going to compare two metrics of comparable sizes in a XY plane, it’s sometime useful to add a 45 degrees reference line (in geometrical terms, a bisecting line). This is extremely useful, among other cases, when you need to compare an above-the-line/below-the-line performance. A typical example, discussed here, is when you need to compare if the channels of incoming visitors to a website are more capable of attracting new rather than returning visitors.

Technically speaking, Tableau doesn’t allow to draw diagonal reference lines, but this could be done with a very simple trick I’m going to explain here. I tested on Tableau Professional 9.0, but it should work with other versions as well.
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5 tips for effective dashboard design for quantitative marketing

Before start exploring the deep cliffs of the quantitative marketing analysis, I would just like to share my personal set of best practices I always use for an effective dashboard design process. Altough these are focused to a typical marketing use case, these are totally generic as they provide a set of analytical starting points and some cooking recipes on how to approach the task of designing a visual reporting environment for your company.

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