contingency

The contingency function calculates the contingency coefficient, a value that measures the association between two columns in a table. The computation is similar to the cramersV function but with a different denominator in the square root.

contingency

Introduced in: v22.1.0

The contingency function calculates the contingency coefficient, a value that measures the association between two columns in a table. The computation is similar to the cramersV function but with a different denominator in the square root.

Syntax

contingency(column1, column2)

Arguments

• column1 — First column to compare. Any
• column2 — Second column to compare. Any

Returned value

Returns a value between 0 and 1. The larger the result, the closer the association of the two columns. Float64

Examples

Comparison with cramersV

Query

SELECT
    cramersV(a, b),
    contingency(a, b)
FROM
(
    SELECT
        number % 10 AS a,
        number % 4 AS b
    FROM
        numbers(150)
);

Response

┌─────cramersV(a, b)─┬──contingency(a, b)─┐
│ 0.5798088336225178 │ 0.708607540104077  │
└────────────────────┴────────────────────┘