Returns the residuals standard deviation (sigma) for object of class "kspm".
# S3 method for kspm
sigma(object, ...)an object of class "kspm", usually, a result of a call to kspm.
additional optional argument (currently unused).
typically a number, the estimated standard deviation of the errors ("residual standard deviation")
The value returned by the method is \(\sqrt{\frac{RSS}{edf}}\) where \(RSS\) is the residual sum of squares and \(edf\) is the effective degree of freedom.
kspm for fitting model, summary.kspm, residuals.kspm, nobs.kspm, deviance.kspm.