# sum of elements by row or column in a matrix in Sage

in Numpy, we can use sum(M,axis=0) or sum(M,axis=1)

what is the equivalent instruction syntax with sage ?

sum of elements by row or column in a matrix in Sage

in Numpy, we can use sum(M,axis=0) or sum(M,axis=1)

what is the equivalent instruction syntax with sage ?

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2

For summing rows:

```
sage: M = random_matrix(ZZ,3,5)
sage: M
[ -2 1 -10 -1 -1]
[ -2 1 -1 1 -1]
[ -3 5 -2 1 2]
sage: sum(M)
(-7, 7, -13, 1, 0)
```

For the columns:

```
sage: sum(M.columns())
(-13, -2, 3)
```

or

```
sage: sum(M.T)
(-13, -2, 3)
```

Asked: **
2016-06-26 03:19:07 -0600
**

Seen: **2,047 times**

Last updated: **Jun 26 '16**

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