Cox–Snell residual (source code)

= Cox–Snell residual
{c}
{title2=$r_i=\widehat H_i(x_i)$}

A <Cox–Snell residual> is the fitted <cumulative hazard function> evaluated at an observed event or censoring time. Under a correct model, complete transformed event times are unit exponential; censored transformed times retain their event indicators. A logarithmic <Kaplan–Meier estimator> survivor plot should be close to a line of slope minus one.