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Python | Numpy matrix.trace()
• Difficulty Level : Basic
• 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.

 `# 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 :

 `# 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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