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"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 am very happy I changed. I love the product, but more so I am thrilled with Tech Support. You are knowledgeable, polite, pleasant and professional." - Comment from Pat
"I had always used ******* but for the past 2 weeks have been trying DTN IQFeed. Customer support has been extraordinary. They call just to make sure your problem hasn't recurred." - Comment from Public Forum
"Just a quick one to say I'm very impressed so far :) The documentation for developers is excellent and I've quickly managed to get an app written to do historical downloads. The system is very robust and pretty quick considering the extent of data that's available. The support guys have been very helpful too, in combination with the forums it's been plain sailing so far!" - Comment from Adam
"Everything is working great ! Very impressive client. The news refreshes better and is more pertinent than the ******* feed I paid $ 100/month for. I Also like the charts a lot." - Comment from Leon
"The service is great, I see a noticeable improvement in my volume profiles over [broker]'s data feed" - Comment from Larry
"It’s so nice to be working with real professionals!" - Comment from Len
"I am very pleased with the DTNIQ system for quotes and news." - Comment from Larry
"Just a thank you for the very helpful and prompt assistance and services. You provided me with noticeably superior service in my setup compared to a couple of other options I had looked at." - Comment from John
"I have been using IQFeed now for a few years in MultiCharts and I have zero complaints. Very, very rare to have any data hiccups or anything at all go wrong." - Comment from Public Forum
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andrei
-Interested User-
Posts: 1
Joined: Aug 24, 2013
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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
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DTN_Tim Walter
-DTN Guru-
Posts: 1238
Joined: Apr 25, 2006
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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
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mongfa
-Interested User-
Posts: 4
Joined: Jul 27, 2014
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Posted: Jul 27, 2014 12:44 PM
Msg. 3 of 6
I also have this problem. could you give us sample code or solution?
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DTN_Tim Walter
-DTN Guru-
Posts: 1238
Joined: Apr 25, 2006
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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
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mongfa
-Interested User-
Posts: 4
Joined: Jul 27, 2014
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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
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DTN_Tim Walter
-DTN Guru-
Posts: 1238
Joined: Apr 25, 2006
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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
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