This article describes how to go from crosstabbed data with a single variable over time:
To a state where you have a line chart, with the area between the line and the x-axis colored to illustrate the volume, also known as an area chart:
You need to have a single value (such as numeric) variable that you want to plot as well as a date variable.
- Create an output on the page by dragging your date variable onto the page, and then dragging your value variable into the columns.
- From the object inspector, go to Visualization > Area > Area.
- OPTIONAL: Go to the Chart tab to modify the appearance of the visualization.
Note that when there are missing values inside the series (i.e. not at the ends of the series) are present, lines are shown along the edge of an Area Chart, with missing segments between points indicating missing values. Stacked Area Charts cannot be plotted with missing values.