Coloring by a categorical Z variable

See also this article on adding Z variables.

If you add a categorical Z variable to a dot plot, histogram or a bar chart it will color the data points according to the category. This can help you see visually if there is a correlation between the Z variable and the others.

Dot plot

Here is a simple example where the Z variable, Direction, has two values, Left and Right.

Histogram

In the histogram case (numerical X, categorical Z) the histogram will be divided up into colored bars according to the Z variable:

Frequency Plot

For a bar frequency plot (categorical X, categorical Z) it again splits the bars by the Z variable:

Customizing colors

In the examples above, the colors have been chosen from an automatic scale that ensures a good contrast. However, you might want to select the colors yourself. This can be done in the Values dialog for the column (located within the column header):

This opens the Values dialog, that allows to you set colors (and labels) for each categorical value:

See also

Setting a DataMoji for each categorical value - see here

Grouping data by a Z variable