Create voltage over time

Is it possible to generate an output voltage on a DAQ 6009 A0? I have an excel data sheet that I have put into a 2D array. The voltage is not constant over time. I am having difficulty with the timing of the signal. I have been able to plot the signal on a graph. It is the same as the original data from excel. I have the two streams of data. Voltage and time. But after seperating the two signals how can I generate the graph?
Solved!
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Attachments:
1177a.JPG ‏52 KB

OOPS
Attachments:
read_excel_values.llb ‏183 KB
Rising.vi ‏27 KB
Voltage.xls ‏70 KB

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Korvanica wrote:
It doesnt seem to like me parsing int to string here:
String s = Integer.parseInt(i);
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<>< Eric
Solved!
Go to Solution.
Attachments:
IMS Software v1.llb ‏612 KB

Eric-WSU wrote:
i get an amplitude over time plot, but it does not appear until after all of the iterations have stopped
I have not looked at your VI (because I am in a previous version of LabVIEW), but this is probably because your graph is outside of the loop.
Here is how you can get a graph of the peaks (all of the peaks, per iteration):
Or if you only wanted a certain peak (and how that peak changes over many iterations):
Message Edited by Cory K on 01-21-2009 05:51 PM
Cory K
Attachments:
simple.PNG ‏3 KB
pick peak.PNG ‏7 KB

Chart Top 10 Items over Time

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-- Do the Group Sort expert or whatever you are using to get the values you would need for chart, might have to use multiple formulas for X, Y and Z axes...
--Join each axis value and make an array, use a Shared Array Variable and assign these values to variable
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Simple Line Chart - Values over time

A simple line chart displaying a set of values over time would seem to be a very easy report to design. I'll be darned if I can see how to design it. Can anyone shed some light?
I have provided links to a report and a spreadsheet which is the report datasource. My actual report will use SQL Server as its datasource. I am providing ths excel based example for the sake of protability.You will need to set the datasource location after saving the files to your hard drive.
I can get the lines to draw properly, what I cannot figure out is how to specify the datetime values for the x axis. The column I would like to use on the x-axis is called DerivedLoggingTime.
I'd also like to get control of the logarithmic algorithm used to formulate the y-axis values. I am not always happy with the values that the log algorithm comes up with.
Any help is greatly appreciated.
[Link to report|http://www.usol.com/~joe/linechart.rpt]
[Link to spreadsheet|http://www.usol.com/~joe/AnalysisResults.xls]
Another discovery while working on this report - our database will be SQL 2008 and we are making use of the datetime2 datatype. CR appears to be treating this datatype as text. So when working with the SQL based datasource, I had to cast datetime2 columns as datetime in order for CR to see the columns as datetime instead of text. This is fine in this instance because the granularity of the datetime values for this particular report does not require datetime2, but that will not always be the case. CR will need to recognize the new datatype.
Edited by: Joe Sytniak on Jul 17, 2008 5:37 PM

Hi Joe,
The Date Axis Line Chart of the Numeric Axis Type Chart, can be used to display data on a regular interval of days, Months and Years. The information displayed can unfortunately not be more granular that days.
This type of chart is generally used when the data is recorded on irregular intervals in the database, and to make sense of the information stored it needs to be displayed at regular intervals.
Since the data stored in your data source seems to be stored every 4 minutes, it will not be necessary to use this type of chart. I will suggest to use the regular line chart instead.
To create a line chart using your date time field and value:
1. Select "Chart" under the menu "Insert"
2. Insert the chart on your report in the desired section.
    ( Group Header # 3 in your case. )
3. In the "Chart Expert" window, under the tab "Type",
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4. Under the tab "Data", add the database field that contains the Date Time information under the "On change of" list.
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click on the button "Order". In the "Chart Sort Order" window,
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Now it will display a line chart as desired, but since there is a lots of data point on your chart, the x axis date time labels will overlap each other. To avoid this situation, I will suggest to skip labels.
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As for your question on how get control of the logarithmic algorithm used to formulate the y-axis values, we unfortunately do not have much control over it other than:
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The above options are available on the y axis. To change those options:
1. In the "Preview" tab of the report, select one of the y axis label, and right click on it. In the contextual menu, select "Group (Y) Axis Options..."
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- Maximum Values
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I will suggest to check the option "Use Logarithmic scales"
Finally, as for the issue you discovered where SQL Server 2008 data type DateTime2 is converted to a string in Crystal Reports 2008, it is important to note that SQL Server 2008 hasn't been released yet, therefore it has not been tested in Crystal Reports 2008. Once SQL Server 2008 is released, I will suggest to test it again using the ODBC driver provided with this new version.
At this point I am assuming that this is happening because it is a new data type and an unknown data type get converted to string.

Memory of jdbc app grows over time (timesten backend db)

Hi everyone,
I have a memory problem with my application(timesten backend db). I don't know how to resolve it and need your help.
When I call stored procedures with CallableStatement, the resident memory of application grows over time (up to 6GB).
I closed statement after executing.
Below is my code and the stored procedure.
public boolean check(String sub)
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Edited by: user5175632 on Oct 25, 2011 3:35 AM

This might be due to this bug raised for JDBC Client/Server connection
Bug 12969330 : MEMORY LEAK IN JDBC CS FOR CALLABLE/PREP STATEMENT W/ NUMPARM % 4 != 0
There is a leak in JDBC driver which seems to affect only C/S; it does not seem to affect direct or batch. ** This bug has been there since 11.2.1.6.0.
Here are few conditions which are needed for this bug to occur:
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3. Number of parameters is not an integral multiple of 4. It is the total number of parameters which matter; parameter type does not matter. JDBC driver leaks memory if the number of parameters in a PreparedStatement/CallableStatement are not an integral multiple of 4.
3. On a close 1-3 parameters can be leaked.
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Create voltage over time

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