Identity

Scales are declared with the SCALE clause. Read the documentation for this clause for a thorough description of its syntax.

The identity scale is a special scale that allows the input to flow through unchanged. You can use this if your data already contains values in a format understood by the aesthetic, e.g. a column of color values mapped to fill. It doesn’t take any additional settings.

Since the identity scale doesn’t do any translation of data it doesn’t create a legend.

Examples

Use data values directly for size

VISUALISE bill_len AS x, bill_dep AS y, flipper_len AS size FROM ggsql:penguins
DRAW point
SCALE IDENTITY size

Use color values directly

SELECT * FROM (VALUES
      ('A', 45, 'forestgreen'),
      ('B', 72, '#3401e3'),
      ('C', 38, 'hsl(150deg 30% 60%)')
  ) AS t(category, value, style)
VISUALISE category AS x, value AS y, style AS fill
DRAW bar
SCALE IDENTITY fill