Creating Pie charts

Pie charts represent the value of the individual items with respect to the total items and is built from a single dimension [A Dimension is a descriptive attribute or characteristic of an object that can be given different values.] and measure [A Measure can be aggregated for each value of the dimension. For instance, you might calculate the Sum of Sales for Product Lines.] only.

The Pie chart displays the relationship between values as well as the relation of a single value to the total. You can use a Pie chart when you have a single data series with only positive values. Envision allows you to add a secondary analysis dimension on the same pie using the slice height method.

Pie chart variants

When to use a Pie Chart

Pie charts are particularly useful for comparing a certain sector with the total. It provides an instant understanding of proportions when few sectors are used as dimensions, for example, 'queued/finished', or 'in-time/delayed/cancelled' to retain its visual efficiency.

However, it is often hard to compare the results of two Pie charts, or different sectors of a Pie chart, especially in a chart with many sectors. Also, the Pie chart takes up more of chart space in comparison to the values it visualizes.

Creating pie charts

1.   On the toolbar, select + New Page from the Pages drop down, or on the Filters and Settings pane, select the Pages tabbed page and then click the + icon to create a new page.

2.   Click the icon in the chart area and then select the Basic tabbed page.

3.   Select the Pie chart type or click theicon at the top right corner of the chart area and then select Pie to create a Pie chart.

4.   From the Dimensions pane, specify a Pie Dimension for the Pie chart.

5.   Specify a Measure for your chart.

Optionally, specify a Legend [Indicates the data series or data points in each chart. Is useful in making the chart or visualization more readable when data appearing in a chart contains multiple data series.] Dimension for your chart.

6.   In the Filters and Settings pane, select any of the following:

▪       Filters tabbed page to browse the chart dimensions using the Dimensions Browser.

▪       Pages to view all pages in the current report [A Report is a collection of individual report pages.] as thumbnails.

▪       Settings to define drill through [Drill through is a feature that allows the user to navigate from one report to another while still analyzing the same set of data.], page, or report properties for the chart.

• Before creating a visualization, it is recommended to select the Dimension Browser view by selecting the Filters tabbed page from the Filters and Settings pane. The Dimensions Browser enables you to easily drag and drop Dimensions or Measures from the Dimensions pane (depending on the chart type) into Dimensions, Measures, Legend, or Browsing Dimensions of the Dimension Browser.

Defining pie chart properties

The Envision chart area comprises context-sensitive menus that allow you to click various areas of the chart to define the chart properties such as the data point properties, display, title, label, legend, and so on.

The following table explains how to define these properties.