[Numpy-discussion] Re: Add to NumPy a function to compute cumulative sums from 0.

Ilhan Polat wrote:

I think all these point to the missing convenient functionality that extends arrays. In matlab "[0 arr 10]" nicely extends the array to a new one but in NumPy you need to punch quite some code and some courage to remember whether it is hstack or vstack or concat or block as the correct naming which decreases the "code morale".

Not having a convenient workaround is not the only problem. The workaround is wastefull with memory and involves unnecessary copying of an array. Having a keyword implemented with these concerns in mind might avoid this.