6.8.2.1.10. statsmodels.sandbox.stats.contrast_tools.groupmean_d

statsmodels.sandbox.stats.contrast_tools.groupmean_d(x, d)

groupmeans using dummy variables

Parameters:

x : array_like, ndim

data array, tested for 1,2 and 3 dimensions

d : ndarray, 1d

dummy variable, needs to have the same length as x in axis 0.

Returns:

groupmeans : ndarray, ndim-1

means for each group along axis 0, the levels of the groups are the last axis

Notes

This will be memory intensive if there are many levels in the categorical variable, i.e. many columns in the dummy variable. In this case it is recommended to use a more efficient version.