Matrices allow power users to show data in a more dynamic table format.
Matrices support a stepped layout. Stepped layouts use a hierarchy of data, which
also allows you to use drill up and drill down options.
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Open the report to which you want to add a matrix.
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In the Visualizations pane, select
Matrix:

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Drag fields to include in the matrix from the Fields pane
to the Rows, Columns, and
Values areas in the
Visualizations pane.

The matrix is shown with rows organized in separate columns.

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Add a stepped layout to the matrix.
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In the Visualizations pane, select
Format.
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In the Row headers section, move the
Stepped layout slider to
On.

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Define any other row header formatting.
The visual appears showing a stepped layout.

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Add totals and subtotals to the matrix:
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In the Visualizations pane, select
Format.
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In the Subtotals section, move the Row
subtotals and/or Column subtotals
slider to On.
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Make any other subtotal format changes.
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In the Grand total section, make any other grand
total format changes.
Grand totals are also considered subtotals and formatting selected
here may overwrite subtotal formatting, depending on your data. Grand
totals are most useful if you have a hierarchy of data (multiple
categories or sub-categories) that also needs a total. In the following
image, the background color for subtotals is yellow and the background
color for grand totals is orange.

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To undo your changes, select Revert to default
in the Subtotals or Grand total section, as applicable.
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Add additional visual cues to the matrix:
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In the Visualizations pane, select
Format.
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In the Conditional formatting section, select the
field to format.
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Select whether to move the Data bars slider to
On.
Select
Advanced controls to further customize
the look of your data.

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Select whether to move the Icons slider to
On.
Select
Advanced controls to further customize
the look of your data.

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Format the matrix:
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In the Visualizations pane, select
Format.

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Set the table size and position on the report canvas, or define it in
the General section using the X
Position, Y Position,
Width, and Height
options.
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Define Alt Text that describes the table for
screen readers.
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In the Style section, choose a new table
Style or Revert to
default.
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In the Row headers section, turn the
Stepped layout toggle
On to show subcategory rows indented instead
of in new columns.
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In the conditional formatting section,
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Define other formatting options as desired.
Formatting options include things like changing the visual's column
headers and the column header background color, changing the visual icon
color, and defining whether certain
Visual header
options (action items) should be available (for example, the
More options icon). Formatting can help
power users make information even more accessible to consumers reading the
report.