Erogol - 1 year ago 125

Python Question

I want to be able to iterate over the matrix to apply a function to each row. How can I do it for a Numpy matrix ?

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Answer Source

Use `numpy.apply_along_axis()`

. Assuming your matrix is 2D, you can use like:

```
import numpy as np
mymatrix = np.matrix([[11,12,13],
[21,22,23],
[31,32,33]])
def myfunction( x ):
return sum(x)
print np.apply_along_axis( myfunction, axis=1, arr=mymatrix )
#[36 66 96]
```

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