octave-nan 2.5.9-2 (amd64 binary) in ubuntu wily

 This package allows the handling of data with and without missing
 values by using NaN in Octave. Features of this package includes:
 implement of the statistical tools, supports DIM argument, supports
 unbiased estimation significance test, confidence intervals and
 Spearman`s rank correlation included in CORRCOEF.
 .
 This package changes the way NaNs are handled in Octave. In order to use
 its functions, the user must explicitly ask Octave to load the package.
 .
 This Octave add-on package is part of the Octave-Forge project.