Layers can be added to certain chart types in Tulip to further increase the value of the analyses you are building. Matching the literal meaning of the word, layers are applied on top of a chart and use the data from it to generate insights. Insights are pieces of information that are extracted from or created using the data, e.g. outliers.
The image below shows an example of a line chart with the control chart layer enabled. There are outliers visualized.
Overview of Layers
The following shows a list of layers in Tulip, the chart types and configuration they are available for, and the insights they generate. Click any layer name to learn more about that layer and how to configure it.
Chart Types / Configuration
One Operation line chart with numeric data on the y-axis
Example: Length measurement for sample numbers
One Operation line chart with numeric y-axis and timeseries on the x-axis
Example: Defects per day.
How to configure a layer
One you selected a chart type that supports adding a layer, the "Chart Layers" icon on the top right of the analytics editor. This will open the "Chart Layers" menu in which will show all charts available for the current chart configuration.
You can turn on a layer by clicking the respective toggle. The settings for it will automatically expand. You can also at any time collapse or expand the settings for a layer by clicking on the arrow left of its name.
Should the toggle for a specific layer be greyed out, this can have one of two reasons:
The chart configuration is not matching the conditions for the layer.
You already have another layer enabled. (Currently, there is a limit of one layer per analysis.)
In both cases, the reason will be shown when you hover over the toggle for the layer.