Join the 80,000 other DTN customers who enjoy the fastest, most reliable data available. There is no better value than DTN!

(Move your cursor to this area to pause scrolling)




"I noticed that ******* quotes locked up shortly after the interest rate announcement yesterday while yours stayed stable." - Comment from Ron in Utah
"You are either overstaffed or people just don't have problems with your feed because customer support always answers the phone quickly." - Comment from Jay via Email
"Excellent datafeed !!!" - Comment from Arely
"I was on the phone with a friend who uses CQG and right after the Fed announcement, CQG was as much as 30 seconds behind DTN.IQ. Some quotes were off by as much as 15-18 cents. Your feed never missed a beat." - Comment from Roger
"If someone needs the best quality data and backfill beyond what their broker provides at a rate that is the best in the industry, I highly recommend IQFeed." - Comment from Josh via Public Forum
"I just wanted to tell you what a fine job you have been doing. While *******, from what I hear, has been down and out, off and on, IQ feed has held like a champ this week." - Comment from Shirin
"I like you guys better than *******...much more stable and a whole lot fewer issues." - Comment from Philip
"Its working FABULOUSLY for me!! Holy cow...there has been so much I've been missing lately, and with this feed and Linnsoft software...I'm in the game now." - Comment from Chris R.
"After all the anxiety I had with my previous data provider it is a relief not to have to worry about data speed and integrity." - Comment from Eamonn
"Boy, probably spent a thousand hours trying to get ******* API to work right. And now two hours to have something running with IQFeed. Hmmm, guess I was pretty stupid to fight rather than switch all this time. And have gotten more customer service from you guys already than total from them… in five years." - Comment from Jim
Home  Search  Register  Login  Blogs Recent Posts

Information on Various DTN Products:
DTN IQFeed | DTN ProphetX | DTN Ag | NxCore
Follow DTN_IQFeed on Twitter
DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter
»Forums Index »Product Support »IQFeed 3rd Party Software Support »IQFeed connection not working with Matlab
Author Topic: IQFeed connection not working with Matlab (6 messages, Page 1 of 1)

andrei
-Interested User-
Posts: 1
Joined: Aug 24, 2013


Posted: Aug 24, 2013 12:15 PM          Msg. 1 of 6
Trying to get the S&P500 stock components with below logic:

history(q,char(stocks(n)),{'01/01/2011','08/23/2013'},'Daily');

where stocks is a cell array with all 500 components.
put this in a loop, with 4 sec delay, and the history command will stop returning the total amount of days for a specific symbol.

For example:

Symbol: EXPD, Nr.of days collected:665
Symbol: EXPE, Nr.of days collected:665
Symbol: F, Nr.of days collected:1

Symbol: CVS, Nr.of days collected:665
Symbol: CVX, Nr.of days collected:1

Symbol: CBE, Nr.of days collected:665
Symbol: CBG, Nr.of days collected:14

each time the program will reach these particular symbols, the history will stop returning the proper amount of days requested.
The workaround is to close-down Matlab (IQF connection may remain open) and open it again.

Are there any troubleshooting means, any diagnostic commands that could help - for example assess if the connection to IQFeed is still operational ?

I assume I'm not the only one trying to download the components of an index from within matlab - are there any working samples available anywhere?

Thx

DTN_Tim Walter
-DTN Guru-
Posts: 1103
Joined: Apr 25, 2006


Posted: Sep 23, 2013 11:14 AM          Msg. 2 of 6
Hello Andrei,

Sorry to have missed this, were you able to get this worked out since this post?

Tim

mongfa
-Interested User-
Posts: 4
Joined: Jul 27, 2014


Posted: Jul 27, 2014 12:44 PM          Msg. 3 of 6
I also have this problem. could you give us sample code or solution?

DTN_Tim Walter
-DTN Guru-
Posts: 1103
Joined: Apr 25, 2006


Posted: Jul 28, 2014 01:28 PM          Msg. 4 of 6
Hello Mongfa,

I am sorry, but I do not have access to MatLab's API documentation so we would recommend going to them for support. All of the samples I would have to illustrate what you are doing require an IQFeed API subscription. But, what I see in the code above appears to make sense, so if you are having the same issue in your loops, I would certainly check with Matlab to see if they have an update or any advice that they could give. If there is a systematic issue with their API interface, I would think this would be a common call for them to receive if so.

Tim
Edited by DTN_Tim Walter on Jul 28, 2014 at 01:29 PM

mongfa
-Interested User-
Posts: 4
Joined: Jul 27, 2014


Posted: Jul 30, 2014 06:25 PM          Msg. 5 of 6
same loops code with another datafeed is working correctly. but it's not work with iqfeed

DTN_Tim Walter
-DTN Guru-
Posts: 1103
Joined: Apr 25, 2006


Posted: Jul 31, 2014 07:39 AM          Msg. 6 of 6
Good morning,

That type of logic works within our API as well, so I do not know what the issue that you are having is. There are features within our API that would allow me to help further, all I can do is hope that MatLab has the same kind of thing within their system to help you get past this.

I am sorry I cannot be of more help here,
Tim
 

 

Time: Thu January 18, 2018 7:54 AM CFBB v1.2.0 31 ms.
© AderSoftware 2002-2003