Standard deviations

Extract standard deviations from estimated models.

Usage

stdEr(x, ...)
# Default S3 method
stdEr(x, ...)
# S3 method for class 'lm'
stdEr(x, ...)

Arguments

x: a statistical model, such as created by lm
...: further arguments for methods

Details

stdEr is a generic function with methods for objects of "lm" class. The default method returns the square root of the diagonal of the variance-covariance matrix.

Value

numeric, the estimated standard errors of the coefficients.

Author

Ott Toomet otoomet@ut.ee

Examples

data(cars)
lmRes <- lm(dist ~ speed, data=cars)
stdEr( lmRes )
#> (Intercept)       speed 
#>   6.7584402   0.4155128