When you click and drag a discrete dimension field from the Dimensions area to Rows or Columns, Tableau creates column or row headers. B and D are considered dimensions by Tableau. Continuous and discrete are mathematical terms. For more on filtering various types of fields, see Drag dimensions, measures, and date fields to the Filters shelf (Link opens in a new window). For a discussion of the different types of aggregation Tableau can perform, see List of Predefined Aggregations in Tableau. In the example on the right, the Quantity field has been set to Discrete. In this mode, we select "dimension" for our SUM(Sales) measure, and now Tableau will dis-aggregate it. Continuous means "forming an unbroken whole, without interruption"; discrete means "individually separate and distinct.". Tableau represents data differently in the view depending on whether the field is discrete (blue), or continuous (green). When you drop a discrete field on Color in the Marks card, Tableau displays a categorical palette and assigns a color to each value of the field. Let’s discuss when we should be using each of these charts and what the minimum requirements are in terms of measures and dimensions — keep scrolling down :) Blue measures and dimensions are discrete. However, files that you connect to might include columns that have a mixture of data types, such as numbers and text, or numbers and dates. A simple example is adding dimension to an already calculated aggregate value. Tableau divides the data in two main types: dimensions and measures. Tableau can create interactive visualizations customized for the target audience. If Tableau assigns such a field as a measure to the Data pane, you should drag it to a dimensions area to change it to a dimension field. Using measurements as our primary example: In Tableau there are four possible modes when dealing with your measurement fields which result in a different layout or result. The individual values for a discrete field become the row or column headings. When you drag a measure to the view, it is aggregated by default. If the entire view is disaggregated, then by definition no field in the view is aggregated. Continuous and discrete are mathematical terms. Measures contain numeric, quantitative values that you can measure. There was an error submitting your feedback. Specifies one or more dimensions to which the aggregate expression is to be joined. A dimension is a field that can be considered an independent variable. Aggregating Dimensions You can aggregate a dimension in the view as Minimum, Maximum, Count, or Count (Distinct). are made from the columns in your data source. Discrete values are treated as finite. Tableau does not recommend this type of view if at all possible. The level of detail in a view refers to how granular the data is given the dimension and measure data in the view. For example, in the following image, the blue bar actually extends to a value of 6.940 on the horizontal axis, not 7.0 exactly. Tableau treats the values as discrete. See the below image for the same. When you aggregate a dimension, you create a new temporary measure column, so the dimension actually takes on the characteristics of a measure. The type of aggregation will vary depending on the type of view. In cases where Tableau has misclassified a field as a dimension or a measure, possibly because of the data type, you can convert it and change its role. Tableau - Combining two types of dimension values. On my Tableau sheet, I am measuring the hours of music played (Columns) in different rooms in the house (Rows). Tableau continues to aggregate values for the field, because even though the field is now discrete, it is still a measure, and Tableau aggregates measures by default. Tableau will automatically create the appropriate axis range for your measurement, and will query your data source using an optimized aggregate SQL query: B) If we change "continuous" to "discrete" for our SUM(Sales) measurement: We will now get a different type of view in Tableau: Best Practice in Tableau is to use the continuous, visual choice and not the discrete choice, as the human eye can read the visual option much easier. Company may use the same dimension table across different projects without making any changes to the dimension tables. The four pill types are discrete dimension, continuous dimension, discrete measure, and continuous measure.Grasping these concepts is important to understanding Tableau and relational databases in … For details on converting fields between continuous and discrete, see Convert Fields between Discrete and Continuous. Continuous means "forming an unbroken whole, without interruption"; discrete means "individually separate and distinct.". There are multiple reasons why the number of marks could be lower. After you drag a dimension to Rows or Columns, you can change the field to a measure just by clicking the field and choosing Measure. The green background and the axis help you to see that it's a continuous field. This includes, for instance, any field with text or dates values. When you drag a field from the Data pane to Columns or Rows, the values are discrete by default and Tableau creates column or row headers. 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