Retrieves an error type for the most recently called IMSL routine.

Performs the Noether test for cyclical trend.

Computes the number of days from January 1, 1900, to the given date.

Gives the date corresponding to the number of days since January 1, 1900.

Searches a k-d tree for the k nearest neighbors of a key.

Performs a k nearest neighbor discrimination.

Computes maximum likelihood estimates of the mean and variance from grouped and/or censored normal data.

Computes Box‑Jenkins forecasts and their associated probability limits for a nonseasonal ARMA model.

Computes least squares estimates of parameters for a nonseasonal ARMA model.

Computes preliminary estimates of the autoregressive and moving average parameters of an ARMA model.

Computes tie statistics for a sample of observations.