reverse aj aka find the next element after a time

[naveen sharma]

I frequently face the need to find the next element (bid/ask/trade) after an event/signal. I was wondering if there is a reverse aj trick which i am missing.

currently I use a hackish approach where I subtract time from a large/eod time and then do an aj which I think gives me the needful. Has some one tried anything similar, wanted to confirm also if my approach is sound.

Regards

[David Demner]

Usually I define ajr to be exactly aj but with binr instead of bin

--
You received this message because you are subscribed to the Google Groups "Kdb+ Personal Developers" group.
To unsubscribe from this group and stop receiving emails from it, send an email to personal-kdbpl...@googlegroups.com.
To post to this group, send email to personal...@googlegroups.com.
Visit this group at https://groups.google.com/group/personal-kdbplus.
For more options, visit https://groups.google.com/d/optout.

This e-mail message is intended to be received only by persons entitled to receive the confidential information it may contain. E-mail messages to clients of AquaQ Analytics may contain information that is confidential and legally privileged. Please do not read, copy, forward, or store this message unless you are an intended recipient of it. If you have received this message in error, please forward it to the sender and delete it completely from your computer system

[naveen sharma]

thanks! that's a much better approach imo

On Tuesday, May 31, 2016 at 9:52:29 AM UTC+5:30, David D wrote:

Usually I define ajr to be exactly aj but with binr instead of bin

From: naveen sharma Sent: Monday, May 30, 2016 21:13 To: Kdb+ Personal Developers Reply To: personal...@googlegroups.com Subject: [personal kdb+] reverse aj aka find the next element after a time

I frequently face the need to find the next element (bid/ask/trade) after an event/signal. I was wondering if there is a reverse aj trick which i am missing.

currently I use a hackish approach where I subtract time from a large/eod time and then do an aj which I think gives me the needful. Has some one tried anything similar, wanted to confirm also if my approach is sound.

Regards

--
You received this message because you are subscribed to the Google Groups "Kdb+ Personal Developers" group.
To unsubscribe from this group and stop receiving emails from it, send an email to personal-kdbpl...@googlegroups.com.

To post to this group, send email to persona...@googlegroups.com.

Visit this group at https://groups.google.com/group/personal-kdbplus.
For more options, visit https://groups.google.com/d/optout.

[naveen sharma]

Hi David, 

need a little more help, I tried doing the below but it gives an error saying "/"

Is there any escaping or low level changes I need to do?

ajr: {.Q.ft[{d:x_z;$[&/j:-1<i:(x#z)binr x#y;y,'d i;+.[+.Q.ff[y]d;(!+d;j);:;.+d i j:&j]]}[x,();;0!z]]y}

[Jack Andrews]

prefix with k)

k)ajr:{ ..

To post to this group, send email to personal...@googlegroups.com.