# Bumps 0.7.14 documentation

## outliers - Chain outlier tests

`identify_outliers` | Determine which chains have converged on a local maximum much lower than the maximum likelihood.

Chain outlier tests.

`bumps.dream.outliers.``identify_outliers`(test, chains, x)

  Determine which chains have converged on a local maximum much lower than the maximum likelihood.

  test is the name of the test to use (one of IQR, Grubbs, Mahal or none). chains is a set of log likelihood values of shape (chain len, num chains) x is the current population of shape (num vars, num chains)

  Returns an integer array of outlier indices.