Add Trend Lines to a Visualization

Trend lines linear filtering. filter: Linear Filtering on a Time Series

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You can publish a view that contains trend lines, and you add trend lines to a view as you edit it on the web. When you add trend lines to a view, you can specify how you want them to look and behave.

Linear trend estimation

For a 5-minute walkthrough, see the Trend Lines Link opens in a new window free training video. Use your tableau.

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To view more training and introductory videos, go to Free Training Videos Link opens in a new window on the Tableau website. Add trend lines to a view To add a trend line to a visualization: Select the Analytics pane. For more information on each of these model types, see Trend Line Model Types.

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About adding trend lines and when you can't add them To add trend lines to a view, both axes must contain a field that can be interpreted as a number.

For example, you cannot add a trend line to a view that has the Product Category dimension, which contains strings, on the Columns shelf and the Profit measure on the Rows shelf. However, you can add a trend line to a view of sales over time because both sales and time can be interpreted as numeric values. For multidimensional data sources, the date hierarchies actually contain strings rather than numbers.

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Therefore, trend trend lines linear filtering are not allowed. Trend lines linear filtering you have trend lines turned on and you modify the view in a way where trend lines are not allowed, the trend lines do not show. When you change the view back to a state that allows trend lines, they reappear.

Tableau automatically stacks bar marks in many cases.

However, trend lines cannot be turned on for stacked bars. Edit a trend line Once you add a trend line to the visualization, you can edit it to fit your analysis.

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In web editing mode: In the visualization, click the trend line, and then hover your cursor over it. In the tooltip that appears, select Edit to open the Trend Line Options dialog box. Note: To edit a trend line in Tableau Online or Tableau Server, you must have web editing permissions. You can configure the following options in the Trend Line Options dialog box: Select which fields to use a factors in the trend line model.

Add Trendline to a Chart to Forecast Future Values

For more information, see Choose which fields to use as factors in the trend line model. Decide whether to exclude color, using the Allow a trend line per color option. When you have color encodings in your view, you can use this option to add a single trend line that models all of the data, ignoring the color encoding.

Add Trend Lines to a Visualization

Decide whether to Show Confidence Bands. Confidence lines are not supported for Exponential models.

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Select whether to Force the y-intercept to zero. This option is useful when you know that you want your trend line to begin at zero.

This option is available only when both the Rows shelf and the Columns shelf contain a continuous field, as with a scatterplot. Decide whether to show recalculated lines when you select or highlight data in the visualization. Choose which fields to use as factors in the trend line model For trend models that are considering multiple fields, you can eliminate specific fields as factors in the trend line model.

Often you will want to remove factors because you want the trend line model to be based on the entire row in the table rather than broken up by the members or values of a field. Consider the following example.

Tableau - Trend Lines

The view below shows the monthly sales for various products categories, broken out by region. You can see that a separate model is created for each region.

Now remove Region as a factor in the model by deselecting it in the Trend Lines Options dialog box. You can see that the trend line model within a category is now the same across all regions. This allows you to compare actual sales against a trend line that is the same for all regions.

Remove Trend Lines To remove a trend line from a visualization, drag it off of the visualization area.

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You can also click a trend line and select Remove. Note: In Tableau Desktop, trend line options are retained so that if you choose Show Trend Lines again from the Analysis menu, the options are as you last set them. However, if you close the workbook with trend lines turned off, trend line options revert to defaults. See a description of a trend line or trend line model After you add trend lines, you can display statistics on the trend line. For example, you can see the formula as well as r-squared and p values.

Interpreting a trend line

To see a description of a trend line: Hover over any part of a trend line to see its description. Tableau Desktop only Right-click the trend line in the visualizationand then select Describe Trend Line.

To view a full description of the model being used in the current view: Right-click a trend line in the visualization, and then select Describe Trend Model. In the following formulas, X represents the explanatory variable, and Y the response variable. Avoid using a model that discards some data trend lines linear filtering you know that the data being filtered out is invalid.