Stack Overflow
Stack Overflow

Questions tagged [exxeleron-q]

Open source libraries for building `kdb+` system and IPC communication with various languages provided by exxeleron.

Set of open source libraries provided by exxeleron:

5 questions
2
votes
0 answers

qSharp ticker plant subscription

I'm currently trying to subscribe to my tickerplant using qsharp however when I try to get the message data I just get System.Int64[] to be returned or system.object[] as shown here: C# code taken from the sample: using System; using…
Rtrader
  • 917
  • 4
  • 11
  • 26
2
votes
1 answer

Passing pandas DataFrame containing string column to kdb+ (using qPython API)

exxeleron/qPython module allows to send the pandas DataFrame to kdb+/q's table. Let's prepare the data: import pandas.io.data as web import datetime import numpy start = datetime.datetime(2010, 1, 1) end = datetime.datetime(2015, 2, 6) f =…
Daniel Krizian
  • 4,586
  • 4
  • 38
  • 75
1
vote
1 answer

Issue with null character received by qpython/pandas from kdb

This question is pretty much directed at @Maciej Lach but if anyone else has experienced this issue please let me know. The issue is simple - qpyhton crashes (when pandas is set to true) whenever kdb sends it a single row table where one of the…
terrylynch
  • 11,844
  • 13
  • 21
1
vote
2 answers

pandas DataFrame drops index when passing to kdb+ (using qPython API)

I am trying to pass time-series data from Python to q/kdb+. One solution out there is qPython module, offering seamless conversion from q table/dictionary to Pandas. The problem is when trying to pass from Pandas to q, the time index in DataFrame…
Daniel Krizian
  • 4,586
  • 4
  • 38
  • 75
0
votes
2 answers

How to publish to KDB Ticker Plant from Java effectively

We have market data handlers which publish quotes to KDB Ticker Plant. We use exxeleron q java libary for this purpose. Unfortunately latency is quite high: hundreds milliseconds when we try to insert a batch of records. May you suggest some latency…
user3914448
  • 469
  • 1
  • 11
  • 22