[Bug?] Hypertrend Draws 'Fake' Gaps in Data
Hi
I have noticed Hypertrend drawing gaps in the data (when there is actually data there). This can be confirm when you zoom in on the data. Is this a known issue, or is there any workaround/configuration? The images are from Hypertrend in LabVIEW, but we have seen it in MAX too.
Cheers
-JG
Certified LabVIEW Architect * LabVIEW Champion
Solved!
Go to Solution.
Here are some prior discussions on the subject...
http://forums.ni.com/t5/Real-Time-Measurement-and/Distributed-System-Manager-Historical-Trend/m-p/99...
Also see attachment for a Jing video of the problem. This occurs in DSM 2009 and 2010 and on multiple machines.
Here is the final result after much rangling with NI:
From: Mark Black [mailto:[email protected]]
Sent: Thursday, January 21, 2010 4:53 PM
To: Sachs, Michael A. (MSFC-ET30)[Intelligent Systems]
Cc: Roger Hebert
Subject: Re: DSM issues
Hi Mike,
We do have a CAR for this issue (#178809), but its a general CAR for these
types of Hypertrend drawing issues that your case fits into. Currently
this bug is not targeted to be fixed for SP1, but I have contacted our Shanghai
development team for more an update. Have you seen this issue on multiple
different systems? Have you seen this issue with plots not tied to your
GPS synched cRIO?
Thanks,
Mark Black
Product Support Engineer - LabVIEW R&D
National Instruments
[email protected]
(512) 683-8929
Attachments:
2010-10-18_0907.zip 3018 KB
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at
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David Ezzio wrote:
>
I am encountering trouble executing a query that involves
navigating a one-way one-to-one relationship
(persistent reference to PC object) to use a Date field.
The query is the following: "period.endingDate <=
p.endingDate" with a query class of Vote. The right side of the
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at com.solarmetric.kodo.query.QueryImpl.getExpression(QueryImpl.java:371)
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at com.solarmetric.kodo.query.QueryImpl.executeWithArray(QueryImpl.java:393)
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// The pair (topic, period) is unique for all votes
private Topic topic;
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private int count;
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// the pair (startingDate, endingDate) are unique for all voting periods
private Date startingDate;
private Date endingDate;
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is:
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java.io.NotSerializableException: com.ysoft.jdo.book.voting.VotingPeriod
at
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at
com.solarmetric.kodo.impl.jdbc.runtime.JDBCExpressionFactory$Constant.<init>(JDBCExpressionFactory.java:419)
at
com.solarmetric.kodo.impl.jdbc.runtime.JDBCExpressionFactory.getConstant(JDBCExpressionFactory.java:213)
at com.solarmetric.kodo.query.FilterParser.eval(FilterParser.java:562)
at com.solarmetric.kodo.query.FilterParser.getValue(FilterParser.java:668)
at com.solarmetric.kodo.query.FilterParser.eval(FilterParser.java:601)
at com.solarmetric.kodo.query.FilterParser.getExpression(FilterParser.java:677)
at com.solarmetric.kodo.query.FilterParser.evaluate(FilterParser.java:527)
at com.solarmetric.kodo.query.QueryImpl.getExpression(QueryImpl.java:371)
at com.solarmetric.kodo.impl.jdbc.runtime.JDBCQuery.getExpression(JDBCQuery.java:49)
at com.solarmetric.kodo.query.QueryImpl.executeWithMap(QueryImpl.java:312)
at com.solarmetric.kodo.query.QueryImpl.executeWithArray(QueryImpl.java:393)
at com.solarmetric.kodo.query.QueryImpl.execute(QueryImpl.java:285)
David Ezzio
Yankee Software -
SQL Lead & Lag to find gap between dates
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(EVENT_START, EVENT_END)
Values
(TO_DATE('08/12/2013 15:30:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('08/12/2013 17:00:00', 'MM/DD/YYYY HH24:MI:SS'));
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(EVENT_START, EVENT_END)
Values
(TO_DATE('08/12/2013 16:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('08/12/2013 17:30:00', 'MM/DD/YYYY HH24:MI:SS'));
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EVENT_END
08/12/2013 15:30:00
08/12/2013 17:30:00
08/12/2013 20:00:00
08/12/2013 22:00:00
08/12/2013 22:45:00
08/12/2013 23:55:00
or when there can be more than two consecutive overlaps
select event_start,
event_end
from (select case when lag_overlap is null
then event_start
end event_start,
case when coalesce(lead_overlap,lag_overlap) is null
then event_end
when lag_overlap is null and lead_overlap is not null
then lead(event_end) over (order by event_start)
end event_end
from (select event_start,event_end,
case when event_start < lag(event_end) over (order by event_start)
then 'overlap'
end lag_overlap,
case when event_end > lead(event_start) over (order by event_start)
then 'overlap'
end lead_overlap
from mybatchtab
where lead_overlap is null
or lag_overlap is null
where event_end is not null
and event_end is not null
order by event_start
Regards
Etbin
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