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Venn diagrams

Illustrate overlaps between subsets

Updated at 2019-06-26 17:02:25 UTC

You can create a Venn diagram for a multiple-response element or a compact group. If there are more than three items, Protobi will seek a reasonable approximation.

Venn diagram showing overlapping device ownership with three circles representing Smartphone (light blue), Tablet (green), Basic cell or mobile phone (blue), and Feature phone (yellow). The circles overlap to show respondents who own multiple device types, with Tablet appearing in the center intersection area.

Example

In this example, respondents were asked what device(s) they owned in a check-all-that-apply question:

Protobi data view showing question S4 "Which of the following devices do you own?" displayed as a horizontal bar chart. Five device options are listed with percentages and blue bars: Basic cell or mobile phone (33.4%), Feature phone (26.2%), Smartphone (61.0%), Tablet (38.4%), and None of these (2.9%). The view is labeled "Compact to Yes" indicating it shows only positive responses.

Venn diagrams also work with individual elements that can have multiple values. You can transform a compact group into a multiple-value discrete element by choosing "Transform..." from the context menu and selecting "Compact":

Protobi data view showing question S4 with transformation note "Transform to compact" displayed in italics. The data shows device ownership percentages with horizontal bars: Basic cell or mobile phone (33.4%), Feature phone (26.2%), Smartphone (61.0%), Tablet (38.4%), and None of these (2.9%). An N value of 123.5 is shown at the bottom.

Press the square edit icon for the question and select "Chart type..." from the context menu. This will bring up a Chart dialog:

Chart dialog box showing multiple chart type and option buttons arranged in a grid. The Venn diagram button is highlighted in green with a tooltip reading "Venn diagram". The dialog includes sections for Chart type (showing core, paired, tornado, column, bar, line, pie, scatter, cumul, venn, cloud, pmap), Chart options (stack, swap, legend, overall, reverse-x, reverse-y), and Legend position (top, right, bottom). Cancel and Ok buttons appear at the bottom.

Select the button for Venn diagrams and press "Ok."

Venn diagram for question S4 showing device ownership with four overlapping circles and a separate small circle. The main Venn includes Smartphone (light blue), Tablet (green), Basic cell or mobile phone (blue), and Feature phone (yellow) with various intersection regions. A small gray circle labeled "None of these" appears separately to the right. The subtitle indicates "(Compact to Yes)".

Customize colors

You can specify your own colors:

Venn diagram with custom colors showing question S4 device ownership. Four overlapping circles use purple/pink color scheme: Smartphone (purple), Tablet (light purple/pink in center overlap), Basic cell or mobile phone (pink), and Feature phone (dark purple). The small gray circle for "None of these" remains separate. Subtitle shows "(Compact to 1)".

To specify colors, select "Edit JSON..." from the context menu and create an attribute "colors" mapping value keys to CSS colors:

JSON editor dialog showing element properties for S4 question. The JSON code includes structure for compactto, title, format object mapping device categories (S4a through S4x), children array, key, and a colors object defining custom hex colors for each device category (S4a: #4D83F87, S4b: #2A1B3D, S4c: #44318D, S4d: #E98074, S4x: #A4B3B6). Cancel and Ok buttons appear at the top right.

Remove a category

Often checkbox questions like these include a final category, "None of these" as in this example. This last category doesn't really make sense in a Venn Diagram.

You can remove an item either by removing it as a child from the parent group or hiding the element in the tree:

Split view showing Protobi tree navigation on the left and Venn diagram on the right. The left panel displays parent element S4 and its child elements (S4a through S4d) with S4x "None of these" shown with strikethrough and light blue highlight, indicating it's hidden. The right panel shows the Venn diagram without the "None of these" circle, displaying only the four device categories (Smartphone, Tablet, Basic cell or mobile phone, Feature phone) with their overlapping regions.

Export to PowerPoint

Venn diagrams also export to PowerPoint. Right now Venn diagrams export as images but we are working to export them as native PowerPoint shapes.

PowerPoint slide showing exported Venn diagram. The slide has a gray header reading "Click to edit Master title style" and displays question S4 "Which of the following devices do you own?" with the Venn diagram below. The diagram shows four overlapping circles for Smartphone (light blue), Tablet (green), Basic cell or mobile phone (blue), and Feature phone (yellow). The Protobi logo appears in the bottom left corner, and page number 2 is shown in the bottom right.

It's one thing to see a nice chart, but each dataset often has some complexity. Contact Protobi support support@protobi.com to discuss your dataset.