Furthermore if you want a simple rank-1 vector as result, try this
> (,1);(,2);(,3)
1
2
3
, > (,1);(,2);(,3)
1 2 3
; (,1);(,2);(,3)
1 2 3
On Mon, Oct 4, 2021 at 12:34 PM bill lam <[email protected]> wrote:
> For some design reason, the shape of all cells in data are rank-1 even if
> the content is just a number. You can fact check with $&.> data
> unbox a vector of rank-1 singleton will give a rank-2 column vector.
> try this > (,1);(,2);(,3)
>
> On Mon, Oct 4, 2021 at 12:18 PM John Dell'Aquila <[email protected]> wrote:
>
>> Hi all,
>>
>> I just discovered J a few months ago and have decided to take it up
>> seriously. I wish I'd found it 20 years ago. You folks keep a seriously low
>> profile on the internet :-)
>>
>> I've worked through all of Pri, JfC and LJ to the point where I can read
>> modestly complex J sentences and use NuVoc. Now I'm trying do some actual
>> work. It's a slog gaining fluency but I can see that it will be worthwhile.
>>
>> I queried a few days worth of security weights and returns using ODBC.
>> When I unbox the weights I get a 4x1 column vector:
>>
>> data
>> +-------------------+----------+---------+
>> |2021-09-27 00:00:00|0.00346414|0.004956 |
>> +-------------------+----------+---------+
>> |2021-09-28 00:00:00|0.00381956|_0.017077|
>> +-------------------+----------+---------+
>> |2021-09-29 00:00:00|0.00378703|_0.011965|
>> +-------------------+----------+---------+
>> |2021-09-30 00:00:00|0.0037419 |_0.002666|
>> +-------------------+----------+---------+
>> 1 {"1 data
>> +----------+----------+----------+---------+
>> |0.00346414|0.00381956|0.00378703|0.0037419|
>> +----------+----------+----------+---------+
>> > 1 {"1 data
>> 0.00346414
>> 0.00381956
>> 0.00378703
>> 0.0037419
>>
>> I did the same with some random floats and I get a list as I expected:
>> > 1 {"1 <"0 ?. 4 3$0
>>
>> 0.32928382 0.058375569 0.72942991 0.41690965
>>
>>
>> Can someone explain what I'm missing here?
>>
>> Thanks,
>> John
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
>>
>
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