On Mon, 23 Sep 2019, Sven Schreiber wrote:
Am 23.09.2019 um 14:17 schrieb Sven Schreiber:
Yes, I give up ;-)
P.S.: I still think the name 'msample' is suboptimal. The meaning of the
initial m is not clear to me. If it refers to "matrix", I'd say it
should also work on a series. So perhaps "subsample", or "pick", or
whatever.
Yes, the 'm' is supposed to suggest "matrix" -- but actually I think
that's right.
We already have "smpl n --random" for datasets, and allowing a
single series argument to <function whose name is under discussion>
would be a little strange. You couldn't get a series back, it would
have to be a vector -- unless you set n equal to the number of
observations, thereby just scrambling the series rather than
subsampling, which seems an unlikely project.
If for some reason you want to draw a subsample from a particular
series in isolation from the dataset as a whole, it seems OK to me
that you should "cast" it to a vector -- as in, for a series x,
matrix subx = msample({x}, n)
And in the unlikely event that you want to put into the dataset a
scrambled version of an entire series, you could do
series scrambled_x = msample({x}, $nobs)
("casting" the vector result back to a series).
Admittedly there's no rule saying that a function taking a series
argument can't return a vector but this would be unusual. Most such
functions return either a transformed series or a scalar statistic
(with the exception of values()).
Allin
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