spearman.sq {lakhesis}

Spearman Correlation Squared

Description

The square of Spearman's rank correlation coefficient applied to two rankings (Spearman 1904). Rows with NA values are automatically removed.

Usage

spearman.sq(r1, r2)

Arguments

r1, r2

Two vectors of paired ranks.

Value

The square of Spearman's rank correlation coefficient with NA values removed.

References

Spearman C (1904). “The Proof and Measurement of Association between Two Things.” American Journal of Psychology, 15, 72–101. doi:10.2307/1412159.

Examples

# e.g., for two partial seriations:
x <- c(1, 2, 3, 4, NA, 5, 6, NA, 7.5, 7.5, 9)
y <- c(23, 17, 19, NA, 21, 22, 25, 26, 27, 36, 32)
spearman.sq(x, y)