Python | Numpy matrix.trace()

Last Updated : 29 May, 2019
With the help of Numpy matrix.trace() method, we can find the sum of all the elements of diagonal of a matrix by using the matrix.trace() method.
Syntax : matrix.trace() Return : Return sum of a diagonal elements of a matrix
Example #1 : In this example we can see that by using matrix.trace() method can help us to find the sum of all the elements of a diagonal of given matrix. Python3 1== 
# import the important module in python
import numpy as np
            
# make matrix with numpy
gfg = np.matrix('[4, 1; 12, 3]')
            
# applying matrix.trace() method
geek = gfg.trace()
  
print(geek)
Output: 
[[7]]
Example #2 : Python3 1== 
# import the important module in python
import numpy as np
            
# make matrix with numpy
gfg = np.matrix('[4, 1, 9; 12, 3, 1; 4, 5, 6]')
            
# applying matrix.trace() method
geek = gfg.trace()
  
print(geek)
Output: 
[[13]]
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