On Fri, Aug 11, 2023 at 1:47 PM Benjamin Root <ben.v.root@gmail.com> wrote:
I'm really confused. Summing from zero should be what cumsum() does now.

```
>>> np.__version__
'1.22.4'
>>> np.cumsum([[1, 2, 3], [4, 5, 6]])
array([ 1,  3,  6, 10, 15, 21])
```
which matches your example in the cumsum0() documentation. Did something change in a recent release?

That's not what's in his example.
 
--
Robert Kern