sdregi | R Documentation |
Returns the ratio of the SDs of x
and y
, using the largest
SD of the two as denominator. Hence, the result is always 1 (ratio of
equalities) or greater than 1 (ratio of greater inequalities).
If x or y have less than two elements, NA is returned.
sdregi(x, y)
x |
(vector) a numeric vector |
y |
(vector) a numeric vector with compatible dimensions to x |
(numeric) SD ratio
Other splithalfr coefficients:
angoff_feldt()
,
assmd()
,
flanagan_rulon()
,
short_icc()
,
spearman_brown()
# Generate two variables with different means, variances and a correlation of about 0.5
library(MASS)
vars = mvrnorm(30, mu = c(0, 2), Sigma = matrix(c(5, 2, 2, 3), ncol = 2), empirical = TRUE)
# Calculate SD ratio of left and right variables
sdregi(vars[,1], vars[,2])
# Calculate SD ratio of right and left variables; should give same result
sdregi(vars[,1], vars[,2])
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