Depends what Harvey means by "values", I suppose.
I assumed he meant scalars. Otherwise my observation is pretty useless!
Cheers,
Mike
On 15/05/2021 19:01, Joey K Tuttle wrote:
I'm probably wrong, but when I first saw Harvey's request, I thought by amend
he might be visualizing something like -
(],%:) &.> <"0 ]i. 2 5
+-------------+-------------+-------------+-------------+---+
|0 0 |1 1 |2 1.414213562|3 1.732050808|4 2|
+-------------+-------------+-------------+-------------+---+
|5 2.236067977|6 2.449489743|7 2.645751311|8 2.828427125|9 3|
+-------------+-------------+-------------+-------------+---+
- joey
On 2021May 15, at 02:16, 'Mike Day' via Programming <[email protected]>
wrote:
Sorry... another early send!
You’ve already had some helpful, constructive, replies. All I’ve got to add is
to wonder why you’re working with boxed data if your data are as regular as
your example suggests.
If you really do have m rows of n boxed numeric values, why not just open it up with
> ? You can do a lot of processing on the whole array. Box it all up again at the
end if really necessary with <“0 (boxed scalars) or <“1 (boxed rows)
But perhaps I’ve misunderstood your requirements,
Cheers,
Mike
Sent from my iPad
On 15 May 2021, at 10:08, Mike Day <[email protected]> wrote:
Sent from my iPad
On 15 May 2021, at 04:13, HH PackRat <[email protected]> wrote:
Hello again!
I'm thinking, for example, of a table of boxed data in its transposed
horizontal position that has, say, 3 rows of, say, 1000 *boxed* values
each. My goal is to amend *all* of the boxed values to their square
roots in one version of what I want to do and *all* of the original
boxed values to their logarithmic equivalents (maybe multiplied by a
constant, say, 100) in a second version .
Using what I know from past answers to my questions, I'm sure I could
use "for" loops with repeated amends to accomplish this, but that
seems to be working against J's efficiency in dealing with large
quantities of data at once.
How can I do such a mass "amend" of entire tables in one fell swoop in
J? Please show EXPLICIT code rather than tacit code.
Thanks for any and all help!
Harvey
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