Am 15.04.2020 20:54 schrieb Mike Powell:
Thomas,
I J there is not really anything for a column vector. If an object,
like your rvec, has a single dimension it’s a vector. If it has two
dimensions, as does cvec, it’s a matrix. That’s different from most
conventional mathematical notation.
When you do the summation with +/ you lose a dimension in the result.
So a vector sums to a scalar and a matrix (with any number of columns)
sums to a vector. The dimension lost is the last.
Hello Mike,
thank you very much for your explanation. I think, I really brought my
intuition from the domain of conventional mathematical notation into the
J context. I'll try to get rid of the notion of a "column vector" when
programming in J.
Regards,
Thomas
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