KX Community

sandy_bradley

Anyone know how to handle numbers larger than long in kdb+?I need to handle numbers with 20+ digits in kdb+. It seems there is no inbuilt data types for this, other than to store the number as a string or hex. Does anyone know any KDB+ libraries to d...

sandy_bradley

Hi Amir, Can you be more specific? Which cryptocurrencies and exchanges are you interested in?What calculations are you interested in? I wrote a bunch of code because I did not find much out there. From: amir.elayyan148@gmail.comSent: Monday, 11 Marc...

sandy_bradley

Dear all,I am struggling to alter the following sliding window function to operate for dyadic functions.swin:{[f;w;s] f each { 1_x,y }\[w#0;s]}This only works for input functions that take one list as an argument; avg, max, min etc.I would like to us...

sandy_bradley

Dear kdb community,I am running identical q scripts on 2 parallel kdb engines, that feed data from websockets. One is a 64bit package on a 64bit computer. The other a 32bit package on a 32bit computer. The 32bit script runs without any errors. The 64...

sandy_bradley

To anyone looking for Big Integer arithmetic in future, I made a C library to integrate into kdb at:https://github.com/manifoldfinance/qBigInt

sandy_bradley

Thanks Andras,I found a couple of C libraries that could be modified to integrate K structs:https://github.com/SzigetiJ/biguinthttps://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjwwrGww-7vAhUFi1wKHQaSD_AQFjANegQIFRAE&url=https%...

sandy_bradley

If you follow this guide step by step it should work https://code.kx.com/q/kb/ssl/

sandy_bradley

Maybe you can save a local state for the current updates so that you don't have to sort a table with other data.msg.l2update:{ /* handle level2 update messages */ x:"SSZ*"$x; //cast dictionary to relevant types s:.Q.id x`product_id; //extract sym, re...

sandy_bradley

Awesome Nick! Thank you. Hope you get your eBook online soon.I made an automated trader from machine learning, though it didn't make money, it was an enjoyable exercise.https://github.com/sandybradley/qMachineTrader

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Big Integers (larger than long)

RE: [personal kdb+] KDB Collectors for Cryptocurrency exchanges

Moving correlation. Sliding window for dyadic function?

Segmentation fault - 64bit - websockets

Re: Big Integers (larger than long)

Re: Big Integers (larger than long)

Re: Secure Web Sockets (WSS) Failing

Re: Why kdb does not support sorting dynamically(like java TreeMap, sql

Re: fun q: a functional introduction to machine learning in q