Find areas of high density in 2D data.
API follows that of scikit learn (e.g. sklearn.cluster.Kmeans).
Use Gaussian kernel by default.
Support circular kernels.
Implement counts_ attribute.
New feature: pickle of object data to disk.
Removed plot functionality -- moving to separate module.
Track valid dates, number of days between them, etc.
Some utilities for sampling elements from numpy arrays.
Perform multivariate weighted linear regression, handling nans and returning
associated statistics.
default fill_value to nan in nice_array.
fix rarely triggered bug with file_separator option.
remove debug print statements. Default stats.summary call to Sparse class.
store circular option in object.