On Tue, 29 Apr 2008, Keith Goodman apparently wrote:
> I often use x[i,:] and x[:,i] where x is a matrix and i is
> a scalar. I hope this continues to return a matrix.
1. Could you give an example of the circumstances of this
use?
2. Would any or all of the following be just as good
a result?
a. 1d matrix
b. row and column vectors (1d but "oriented" for
linear algebra purposes)
3. If 2a. and 2b. are no good for you,
a. would e.g. ``x[i:i+1,:]`` be too burdensome?
b. would ``rows`` and ``columns`` attributes that
yielded matrics be an offsetting convenience?
Thank you,
Alan Isaac
PS It is nice to have another matrix user in the conversation!
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