First Subset

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The First Subset function returns the value(s) appearing first in an input data series.

When used in a formula visualization, you can specify a count of more than one, e.g, to return the first 3 values.

1. Syntax

FIRST(d0,s0,Alignment)

2. Input

The First Subset function requires the following input:

  • d0 - Input data values - The set of data values for which the First Subset is calculated.

3. Parameters

The First Subset function accepts the following parameters:

  • s0 - First Subset Count (Optional) - The number of values to be returned by the formula. Default value is 1.
  • Alignment (Optional) – Hierarchy placeholder to be used as the alignment axis. Specify a hierarchy to return the first input value(s) corresponding to that hierarchy's values: e.g., FIRST($Measure$, 1, $Year$) will return the first year within each grouping of years under another hierarchy's values such as Country.

When you use the FIRST function within a metric set, it can only return a single value (s0 must be 1). In order to return the first 3 values, for example, you must use a formula visualization. This applies to the other subset functions as well.

4. Output

The First Subset function generates the following output:

  • First Subset - The First Subset result set.

Tip
When used in a formula visualization, you can effectively filter the result to the first value(s), optionally grouped by an alignment hierarchy.

5. See also

Dundas Data Visualization, Inc.
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Toronto, ON, Canada
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