Learn about building and configuring stacked column and bar charts in Mappica.
Stacked column and bar charts allow for the comparison of multiple series of data within each category, providing insight into how individual components contribute to a total value.
These charts use vertical columns or horizontal bars segmented into stacked sections, with each section representing a value from a different series. This format is ideal for visualizing how categories break down across groups, making it easy to compare both the overall totals and the contributions of each series.
In the Setup section, under the Chart tab, you can assign the following properties:
Because the margin sets the space between the chart axes and the edge of the container, ensure you add enough margin for any axis ticks or labels. If needed, use options in the Axes section such as Limit Tick Width, Limit Tick Characters, and Rotate Ticks to constrain the size of tick and label text.
In the Dataset section, you can select the dataset for your chart. If you need to add a dataset, this can be done by selecting New Dataset in the Project tab.
If you are on the Pro plan, you can upload your own files (in csv format) to use as datasets, by clicking New Dataset and then Upload Dataset.
After you have selected a dataset, you can optionally enable the Prefilter Dataset switch, which lets you filter the data that is supplied to the chart. The filter is a "prefilter" because it is applied before the visualization is generated; end users are unable to adjust the filter dynamically.
Next, the Data Format is displayed. You can select either Wide Data or Long Data. The data format should reflect the structure of the selected dataset. It also determines the fields that will need to be set for the chart.
Finally, choose the Fields that should be used to construct the chart:
You can establish connections to filter elements under the Chart tab, in the Connections section, by making a selection under Filter.
A Filter element can be styled as a series of checkboxes, a dropdown menu, or a slider. Values from the specified Filter Field appear as individual checkboxes, dropdown menu items, or (for numeric filtering) slider values. A given chart can be connected to one or more filters, and the same filter can be connected to multiple charts or other elements.
When a filter element is connected to a chart, it dynamically controls the dataset records displayed in the chart based on the user's selections. Filters can also adjust the chart's axis range dynamically, provided one of the chart's axis fields is the same as the filter's Filter Field and the Minimum and Maximum Range values of that axis are set to auto.
Additionally, filter elements can inherit color formatting from a chart, provided that the chart is using Long Data format and the chart's Color Field is the same as the filter's Filter Field. For more information, see the Color Formatting section of the documentation for filter elements.
If your chart uses Wide Data format, use a Selector element instead of a filter to dynamically control the chart color series.
Typically, the Filter element you connect to will use the same Dataset as the chart element. However, this is not strictly necessary. If the filter and chart elements use different datasets, the filter will only affect the chart if the chart's dataset contains a field (column) with the same name as the Filter Field in the filter element. In this case, the values in these fields must at least partially align for the filter to take effect. Any non-matching values between the fields will be ignored during filtering.
If you are using Wide Data format, you can establish a connection to a selector element under the Chart tab, in the Connections section, by making a selection under Selector.
Selector elements control which series fields are displayed in connected elements that use a wide data format. Selectors can be displayed as checkboxes, dropdowns, or legends. While a chart can be connected to only one selector, a single selector can be connected to multiple charts and other elements that use series fields. Once connected, the selector element dynamically controls the dataset fields (columns) passed to the chart as series fields based on user selections.
You can choose how to sort the chart bars or columns under the Chart tab in the Sort section. Choose either to sort by the independent or dependent variable. In both cases, you can also choose to reverse the natural sort order.
In this section, you can customize the chart's Horizontal Axis and Vertical Axis. Whichever of these two axes is used for the independent variable is listed first in the user interface.
If you choose to specify exact tick values, ensure that they don't overlap with one another on tablet and mobile viewports.
The following chart formatting option applies to both axes:
Color formatting is defined in the Colors section under the Chart tab.
If the chart uses Wide Data format, separate colors can be assigned to each of the selected series fields.
If the chart uses Long Data format, you can specify a Color Field, which can be a text field or numeric (number, currency, percent, or measurement) field from the selected dataset. If you select a text field, each unique value in that field will be treated as a category and can be assigned a color. For numeric fields, you can configure a Color Gradient, Domain Minimum and Maximum, and Color Scale. These features are explored in greater detail in our Colors page.
In the Annotations section under the Chart tab, you can toggle on Add Data Point. This overlays a dot annotation on each stacked bar, representing a calculated value based on all items in the stack. Specify the following options:
Tooltips can be enabled by selecting the Chart tab, navigating to the Tooltip section, and selecting Display Tooltip. These are automatically configured to display the fields selected in the chart.