# How to add conditional colouring to Scatterplots in Excel In this tutorial, we will see how to add conditional colouring to scatterplots in Excel. I came across this trick when I was creating scatterplots for an article on Gestalt laws. I wanted the dots on the plot to be in 3 different colours based on which group they belonged to. There isn’t a straightforward way to do this in Excel but with a little data wrangling, its very easy to get this done.

So here is how to do this.

# How to add conditional colouring to scatterplots in Excel?

Here is the data we are going to work with. Its a simple table with X and Y values. Each data point is assigned a group based on a condition. We want each group to show up in a different colour on our scatterplot. ## Step 1: Preparing the data

Take the Y column and break it down into 3 columns A, B and C depending on the group the data point belongs to. To do this, we use the excel IF condition:

IF (Condition, Value if True, Value if False)

The condition we use is “label of the column = the group name”.For example, for the first data point, in column A, we check if A = C. If the condition is true we populate the column A with the Y value 25. Else we add an NA() to the column. In our example, the value will be NA. Drag the formula down the A column and repeat the same steps for column B and C  ## Step 2: Draw the scatterplot

Select Insert and pick an empty scatterplot.

Then select the columns X, A, B,C Click OK. Here is the scatterplot with 3 groups in different colours. ## Step 3: Edit the colours

To edit the colours, select the chart -> Format -> Select Series A from the drop down on top left. In the format pane, select the fill and border colours for the marker. Repeat these steps for Series B and Series C.

Here is our final scatterplot. Do these steps work for you? If you have any questions or suggestions please let me know in the comments below.

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