Sum of a Single Matrix along Columns

This is an example of computing the sum of a single matrix input along the columns of the matrix.

from csdl_om import Simulatorfrom csdl import Modelimport csdlimport numpy as np

class ExampleSingleMatrixAlong0(Model):
    def define(self):        n = 3        m = 6
        # Declare a matrix of shape 3x6 as input        M1 = self.declare_variable('M1',                                   val=np.arange(n * m).reshape((n, m)))
        # Output the axiswise sum of matrix M1 along the columns        self.register_output('single_matrix_sum_along_0',                             csdl.sum(M1, axes=(0, )))

sim = Simulator(ExampleSingleMatrixAlong0())sim.run()
print('M1', sim['M1'].shape)print(sim['M1'])print('single_matrix_sum_along_0',      sim['single_matrix_sum_along_0'].shape)print(sim['single_matrix_sum_along_0'])

[[ 0.  1.  2.  3.  4.  5.] [ 6.  7.  8.  9. 10. 11.] [12. 13. 14. 15. 16. 17.]]single_matrix_sum_along_0 (6,)[18. 21. 24. 27. 30. 33.]