Perform data analysis
Add a group
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Add another new page to the report named Category Analysis.
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Copy, paste, and then sync the Year slicer from the Profit Analysis page to the new page.
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Add a new group based on the Product table Category column.
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Create a group based on the Trainer value.
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Select the Include Other Group checkbox.
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Add a matrix visual, and position and size it so it fills the page.
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Configure the matrix visual as follows:
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Rows: Product Category (groups) and Product Product  - Values: Quantity, Sales, Profit, and Profit Margin from the Sales table
 
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Expand both categories.
 
Apply conditional formatting
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In the matrix visual, apply background color conditional formatting to the Profit Margin field.
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Select red for the minimum color, and green for the maximum color.
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Point out the range of colors used to convey low-to-high profit margin values.
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Save the Power BI Desktop file.
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Publish the report to the newer workspace, overwriting when prompted.
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In the Power BI service, open the Sales Analysis report, and interact with each of the report pages.
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Leave the Power BI Desktop file open.