For one thing, these vectors are very sparse - most elements are empty.  I 
don't know how sparse vectors and matrices are handled by people who know 
what they are doing, but for playing around a little I used dictionaries.

On Saturday, April 15, 2023 at 9:54:08 AM UTC-4 Edward K. Ream wrote:

> On Sat, Apr 15, 2023 at 8:00 AM Thomas Passin <[email protected]> wrote:
>
> I have some reservations about using cosine similarity with vectors like 
>> this.
>>
>
> Good study question. It seems the authors are not concerned, presumably 
> for good reasons.
>
> A related question. What goes into the 10,000 element vectors ;-)
>
> Edward
>

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