Hi, I like to test some simple thing on windows version of 32bit KDB, I inputted a table with 99722 row, with date, sym and other 15 columns of numeric data. However, if I just take a simple average of that 15 column, it take more than 3 minutes to r...
Can anyone point to discussion or work on sparse arrays in k/q? This must have come up somewhere, but I don't see anything in the open resources.Cheers
How can I make .gw.syncexec[] work like .servers.getservers[]? I have separate hdbs for each stock market. How can I query for prc_stocks but not hk_stocks? .servers.getservers[] supports selecting servers by procname or attributes. thxproctype,procn...
I have a table tab, and I have a list of columns allCols I want to calculate their correlation against anther column rr. Below doesn't seem to work: ?[tab; enlist 1b; 0b;allCols!{ x, cor, y }'[4#`rr; allCols] ];but if I just do a simple average, ?[ta...
As I understand it, q is to some extent a subset of K4. Since resources for q are rather meager, I'm also drawing on stuff I can find related to K3 and J. When translating code from these languages to q, I'd like to know for what kinds of tasks I wou...
EMEA
Tel: +44 (0)28 3025 2242
AMERICAS
Tel: +1 (212) 447 6700
APAC
Tel: +61 (0)2 9236 5700
KX. All Rights Reserved.
KX and kdb+ are registered trademarks of KX Systems, Inc., a subsidiary of FD Technologies plc.
