Comments (2)
Andlon
commented on May 28, 2024
The most obvious is to simply write a * b.transpose(). I would recommend you start with this.
This may be quite inefficient, however, since it transposes one vector (possibly incurring an allocation unless it's optimized away), and then also allocates the result. If you want more control, there's the ger BLAS-like function which allows you to compute a possibly scaled outer product, storing it into an existing vector.
It would probably be a good idea to have something like a.outer(&b and/or outer(a, b) in the library, in my opinion.
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bushkov
commented on May 28, 2024
@Andlon Thanks for the reply, using ger should do the trick for me, but I agree it would be better to have a separate outer.
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