statsmodels.tools.tools.add_constant
-
statsmodels.tools.tools.add_constant(data, prepend=True, has_constant='skip')
[source] -
This appends a column of ones to an array if prepend==False.
Parameters: data : array-like
data
is the column-ordered design matrixprepend : bool
True and the constant is prepended rather than appended.
has_constant : str {?raise?, ?add?, ?skip?}
Behavior if ``data?? already has a constant. The default will return data without adding another constant. If ?raise?, will raise an error if a constant is present. Using ?add? will duplicate the constant, if one is present. Has no effect for structured or recarrays. There is no checking for a constant in this case.
Returns: data : array
The original array with a constant (column of ones) as the first or last column.
Please login to continue.