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A function to extract slope/beta1 value.
b1(fit, ...)# S3 method for default b1(fit, ...)# S3 method for formula b1(formula, data = list(), ...)
# S3 method for default b1(fit, ...)
# S3 method for formula b1(formula, data = list(), ...)
A lm object.
lm
Passthrough arguments to lm.
A formula.
formula
A data.frame.
data.frame
The slope of the relevant model.