def hannWindow(size):
    w,h = size
    X = np.arange(w).reshape(w,1)
    Y = np.arange(h).reshape(1,h)
    X = X*np.ones((1,h),'d')
    Y = Y*np.ones((w,1),'d')
    
    window = (0.5*(1-np.cos(2*np.pi*X/(w-1.0))))*(0.5*(1-np.cos(2*np.pi*Y/(h-1.0))))
    return window
Drop and re-add table column from the end, almost like a RENAME
dataset/ETHPy150Open bolme/pyvision/src/pyvision/util/windows.py/hannWindow--crossover with--dataset/ETHPy150Open perseas/Pyrseas/tests/dbobject/test_column.py/ColumnToSqlTestCase.test_drop_add_column1