stop
Cancel subscription WDS data request
Syntax
Description
Examples
Retrieve WDS Subscription Data
Using a WDS connection, subscribe to two securities and process real-time events by using an event handler function. Then cancel the subscription.
Create a WDS connection.
c = wind;
Format output data for currency.
format bank
Using the 0002.HK
and 0003.HK
securities and the
WDS connection, retrieve real-time data for the last price, volume, and last volume fields.
Process real-time data events using the sample event handler function
windEventHandler
. You can use the sample event handler function or
create a custom event handler function to process events.
s = {'0002.HK','0003.HK'}; f = {'rt_last','rt_vol','rt_last_vol'}}; requestid = realtime(c,s,f,@(varargin)windEventHandler(varargin))
requestid = uint64 5
requestid
is the request identifier associated with the subscription.
The event handler function windEventHandler
creates a variable in the
MATLAB® workspace named winddata
. This variable contains the
subscription data.
Display the subscription data.
winddata
winddata = 2×4 timetable Time Codes RT_LAST RT_VOL RT_LAST_VOL ____________________ _________ _______ ___________ ___________ 28-Nov-2017 10:55:25 '0002.HK' 81.30 2106274.00 422500.00 28-Nov-2017 10:55:25 '0003.HK' 15.28 19995745.00 1398000.00
winddata
is a timetable that contains a row for each security with the time
and these variables:
Security
Last price
Volume
Last volume
Stop the data subscription using the request identifier.
stop(c,requestid)
Close the WDS connection.
close(c)
Input Arguments
Version History
Introduced in R2018a
See Also
External Websites
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