3 Replies Latest reply on Oct 20, 2016 10:19 AM by David Li

# What is Logarithmic Scale on Axis of Tableau

Hi Team,

I noticed we have a option called Logarithmic in our Edit axis pane.

What is Logarithmic scale and can you explain with a use case.

• ###### 1. Re: What is Logarithmic Scale on Axis of Tableau

In a logarithmic scale, the axis marks increase by factors of 10. In contrast, in a standard linear scale, the axis marks increase by a factor of 1. So if you have two points on a logarithmic scale, one at tick 1 and one at tick 2, the mark at tick 2 has a value 10 times larger than the other mark.

A great example of this is the Richter Scale, which is a logarithmic measure of earthquake intensity. A quake that's 2 on the Richter Scale is 10x more powerful than a 1. A 3 is 100x more powerful than a 1. And so on.

Here's a nice overview of when to use log scales: http://datadrivenjournalism.net/resources/when_should_i_use_logarithmic_scales_in_my_charts_and_graphs

1 of 1 people found this helpful
• ###### 2. Re: What is Logarithmic Scale on Axis of Tableau

Thanks David. That helped me a lot I will try on my data and see how it looks

• ###### 3. Re: What is Logarithmic Scale on Axis of Tableau

You're welcome! Use logarithmic scales sparingly, though. In 99% of situations, they aren't good practice.

1 of 1 people found this helpful