Peak Integration in Diadem

Hallo I received an evaluation version of Diadem with LabView. Is there any way to let's say integrate certain peaks from a chromatogram ? I saw it can find the maximums in the spectrum but did not see any standard routine to integrate that particular area. Thank you

Hi,
to analyse a particular area you must copy this values into new channels (columns). Therefore you can esyly use the panal DIAdem VIEW. You can drag&drop the original channels into a 2D-axis system, define a band cursor (icon on the top), mark the area (icon in the current window) and copy (icon in the current window)it. Now you can use the mathematical function you would like.
Kind regards
Walter Rick

Similar Messages

FFT Amplitden Peak Spektrum

Das Amplitudenspektrum wird meines wissens sqrt(Re^2+Im^2) berechnet (steht auch so in einem alten DiaDago - Handbuch). Wenn ich eine FFT durchführe und das Ampl - Peak Spektrum welches Diadem berechnet mit dem aus Real- und Imaginärteil berechnetem Amplitudenspektrum vergleich, stimmen diese nicht überein. Kann mir jemand erklären, wie Diadem intern das Amplituden Peak Spektrum berechnet?
Attachments:
FFT.jpg ‏79 KB

Hallo hp.ritter,
die Formel ist richtig. Ich habe das geschilderte Problem in der aktuellen DIAdem Version geprüft. Hier stimmen die Ergebnisse von DIAdem mit den händschen überein. Könntest du mir den Datensatz, die Ergebnisse und die FFT-Einstellungen (am Besten als Script) zur Verfügung stellen? Dann kann ich das noch weiter untersuchen. Welche DIAdem Version setzt du ein?
Gruß
Walter

After zooming, how do I get x and y values?

I have an instrument that saves data in a simple x and y format. When viewing this data I would like to determine the peak width, height, position and area. I have utilized the peak detector vi to pick the peak and set the threshold, however, I have not been successful at getting the peak width and area for a specific peak. I think my first step is to isolate the data range that my peak resides. So, after zooming on a specific peak, how do I extract the x and y values for that zoomed region and apply them to peak integration and fitting? Does anyone have a sample vi I could look at or is there already a canned vi in Labview to do this?
Thanks
Brian

Have you tried to use the peak detector vi to search for *valleys* ? That could give you the peak start and end.
If you decide to use manual positionning of peaks, you can get the x limits of the graph display using property nodes : Right click on the graph terminal then Create>>Property node. Right click on the property node then Properties>>X scale>>Range.
You could also use graph cursors (wave form graph or XY graph) : make the cursor legend visible (right click on the graph), then give a name to cursor n°0 (peak start) and cursor n°1 (peak end). Set the cursor to "Lock to points". Get the x and y cursor coordinates using the cursor list property node, as illustrated in the attached example.
Once you get the x start and end coordinates, data
processing should not be too difficult, but depends on the data type you are dealing with (are the points equally spaced ? Are the data noisy ?..).
If your start and end X coordinates do not correspond exactly to experimental data, you can either interpolate through the points or search for the index of the nearest points in the x array (use the Threshold 1D array vi for that, pass the x fractional value (that you got from your windowing zoom) as input, as shown in the second example.
Ask if you need more help.
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
Cursors.tif ‏12 KB
Peak_data.tif ‏8 KB

What is the method/algorithm used by Diadem for peak search?

Hi all,
Can you please let me know what method/algorithm is used by Diadem for peak search? Please note I am familier with peak search function in Diadem but I need to know the theory/algorithem that it uses to find the peaks.
Thanks
Hossein
Solved!
Go to Solution.

Greetings Hossein
Check the last paragraph of this document.
Let us know if that answers your question or if you have further inquiries on this subject. Have a nice day!
Luis J.
Applications Engineer
National Instruments

Excel calculation in DIAdem for Peak Sun Hours

I am trying to perform a calculation for peak sun hours in DIAdem that we typically perform in Excel. Any advice on how to approach this calculation in the DIAdem environment much appreciated.
Solved!
Go to Solution.
Attachments:
Irradiance Data.xlsx ‏2050 KB

Hi moses montoya,
I was able to recreate the Peak Sun Hours data with the following script.
Dim PeakSun, intLoop
PeakSun = ChnAlloc("Peak Sun Hours")
Data.Root.ChannelGroups(1).Channels("Peak Sun Hours").Values(1) = 0
For intLoop = 2 to (Data.Root.ChannelGroups(1).Channels("Channel 2").Size - 1)
Data.Root.ChannelGroups(1).Channels("Peak Sun Hours").Values(intLoop) = Data.Root.ChannelGroups(1).Channels("Peak Sun Hours").Values(intLoop - 1) _
+ (Data.Root.ChannelGroups(1).Channels("Channel 1").Values(intLoop) - Data.Root.ChannelGroups(1).Channels("Channel 1").Values(intLoop - 1)) * 24 / 1000 _
* Data.Root.ChannelGroups(1).Channels("Channel 2").Values(intLoop)
Next
Channel 1 was the time, and Channel 2 is the irradiance.
Regards,
Brandon V.
Applications Engineering
National Instruments
www.ni.com/support

Integrating Diadem into a web app. Is this possible?

I have a development team that manages a data collection engine that is web based and I am looking into trying to integrate Diadem to it.
I want to understand my options of doing this.
Thanks,
Tony

Hi Tony,
As of DIAdem 2012 there is no product feature that makes it easier to create a web front end to DIAdem. You can host DIAdem with a terminal services approach such as Citrix, which will give you all of DIAdem's functionality in a web GUI. You can also host DIAdem on a cloud server if that's where your data is.
On final option is that LabVIEW offers a user programmable web server which can make calls to DIAdem via ActiveX.
Brad Turpin
DIAdem Product Support Engineer
National Instruments

DIAdem Integration from acceleration to velocity

Hello, I have recorded acceleration with a 3-axis accelerometer and have converted the voltage to m/s^2. From here I use DIAdem's Crash Analysis to get the resultant and highpass this channel at 0.05Hz to remove DC offset as suggested in previous discussions. Then I integrate this channel to get velocity. However, the numbers I achieve are certainly not velocity. Please advise.

Hello, GTD
Could you supply a sniplet of data please?
I tried intefgration over some simulated data and it seems to work straight from the box - but simulated data are always wellbehaved...
Michael

How to integration between labview and diadem

Solved!
Go to Solution.

Hello Patag_M,
A good place to start is here. These free VI's work with LabVIEW 7.1 and later and DIAdem 9.0 and later:
http://digital.ni.com/softlib.nsf/websearch/5121C7F322C9392886256EDF005BB4FF
Examples are included with the installer.
Otmar
Otmar D. Foehner
Business Development Manager
DIAdem and Test Data Management
National Instruments
Austin, TX - USA
"For an optimist the glass is half full, for a pessimist it's half empty, and for an engineer is twice bigger than necessary."

Difference between diadem and LabVIEW Report Generation Toolkit

I want to expand LabVIEW's reporting capabilities. Can someone tell me what the difference is between DIAdem and the LabVIEW Report Generation Toolkit for Microsoft Office.

Hello Mr Bean,
There are several major differences between the two solutions. I'll try and outline them as good as I can ...
The biggest different is that LabVIEW and its toolkits are programming tools and DIAdem is a ready to run application.
The LabVIEW Report Generation Toolkit basically provides an extensive library of VIs that allow you to connect LabVIEW to the MS Office library and create and edit reports in Word and Excel.
DIAdem is a stand alone application that was designed to post-process data from various sources. The tools included in DIAdem are:
1. NAVIGATOR: Allows you to import data from files (ASCII, binary, Excel, etc.) as well as DataBases (SQL/ODBC, Citadel, ASAM, etc.). The unique DataPlugin technology available within DIAdem allows you to import vitually and data file by creating a DataPlugin that describes the data format and gets linked to DIAdem. More information at: http://www.ni.com/diadem/dataplugins.htm
2. VIEW: Graphical and Numerical data inspection tool. Use cursors to zoom and scroll through your data, edit your data graphically and numerically and compare different tests.
3. ANALYSIS: DIAdem has a wide range of analysis functions, ranging from simple functions like integration and differentiation to FFTs, Order analysis and 3D data analysis.
4. REPORT: The DIAdem REPORT tool allows you to create reusable report layouts that can contain multiple axis systems (2D, 3D and polar plots) as well as tables (2D and 3D) and variables. The REPORT tool generates templates that can be usedwith multiple data sets due to the inclusion of automatic (or manula if required) scaling as well as extensive use of variables for annotations. Finished reports can be exported to printers, graphics files, the Windows Clipboard, HTML pages and PDF files (PDF writing is build into DIAdem, no extra software required). Using Scripts, it is also possible to create Word, Excel or Powerpoint reports from DIAdem automatically.
5. SCRIPT: The DIAdem scripting tools allows users to record macros or write scripts that automate complete sequences, for the import of data, via extensive analysis, to creating a publication ready report. Scripts can make reports "intelligent" by modifying the appearance of a report based on the data or calculation results that are going to be displayed in the report.
I recommend you check out the following link for more information: http://www.ni.com/diadem/
DIAdem is an extremly powerful tool for report generation. I am leaving to go on a business trip to Asia, but I would be more than happy to give you an Web presentation on DIAdem after I have returned. We could use your data and create a DIAdem report Script together online. My Email address is [email protected] and I will be back the week of Thanksgiving.
Otmar
Otmar D. Foehner
Business Development Manager
DIAdem and Test Data Management
National Instruments
Austin, TX - USA
"For an optimist the glass is half full, for a pessimist it's half empty, and for an engineer is twice bigger than necessary."

How can I use the Diadem FFT Analysis GUI to give me multiple outputs given multiple inputs?

I have a few hundred channels I would like to perform FFT analysis on. They are mostly of different lengths, but I know I will have groups of 7 that will have the same number of data points. The default GUI will accept those 7 sets since they are the same size, but it will only give me one output as a combination of the sets. Is there a way to get Diadem to give me an FFT output for each set without having to select each data set individually?

The way it worked with the default channels, I had to make sure I wasn't going crazy because the way you demonstrated worked very well for me. That being said, for some reason what I am doing does not work. I've recently found that it is in changing the details in the GUI that makes my output different than yours. The differences are as follows:
1) I do not use a time channel. That is always left blank.
2) in the 'Window Functions' tab, I change the window type to Hanning
3) In the 'FFT Functions' tab, only amplitude is checked with the properties 'Peak amplitude', No Third/Octave, and Average amplitude is changed to arithmatic.
4) In the 'Time Intervals' tab 'Length/Start/Overlap' is checked, Interval length is changed to 1024, and overlap (%) is changed to 50.
I've also found that changing any number of these details from the default will cause my proplem to crop up. I am fairly sure that most of those options are just as feasibly done to one channel as they are to multiple. Is this a bug, or am I misunderstanding a property of FFT that has gone over my head? Please try changing a few of those properties since it seems like it should work just as well for all the channels as it does for just one, but that doesn't seem to be the case.
Another point of confusion is that while the window previewing the inputs in the GUI will show all the inputs I have selected, the window previewing outputs only appears to preview a single unknown output. That is just a side note though.

How can I connect a C prog with diadem

Hi!
I have written a C program, that converts a ASCII File in format what DIADem can read. But now I would like to integrate this C Program in my DiaDem VBSscript. How can I do this?
Could you give some advice or where I can find some information. Thanks in advance.
John

Hi John,
I'm not sure what kikiduu has in mind exactly. VBScript can invoke object variables from external COM objects or ActiveX servers. So if you build a COM wrapper around the C DLL or in any other way expose the DLL such that a program can invoke an object variable from it, then I agree that this is a valid option. The VBScript command to invoke an object variable from an external definition is CreateObject(). The other option here is to use the shareware "DynaWrap" to dynamically wrap your DLL, but I hear this does not always work, although it certainly works some of the time.
But really, developing C code to help DIAdem read an ASCII file is serious overkill. The native way to go about this would be to create a VBScript DataPlugin to read the ASCII file. Would you be able to post or email ([email protected]) an example of one of these ASCII files for me to take a look at? If it's a simple enough file, I'll just create a DataPlugin for you. VBScript DataPlugins offer the ability to describe how the data is stored in the ASCII file, so that the actual file parsing is done in C in the DataPlugin engine. Performance is therefore rarely a limitation in this approach, and you get superior integration into the DIAdem environment, including automatic DataFinder file indexing, selective and reduced file loading, registered file loading, channel previews in the NAVIGATOR, etc.
Brad Turpin
DIAdem Product Support Engineer
National Instruments

What are the fft based algorithms DIAdem is using?

Greetings! I am relatively new to DIAdem and am trying to find some basic information about how DIAdem is performing some calculations, specifically the FFT based functions. The DIAdem help does not cover in depth what I would like to know and I cannot find anything on NI's website or these boards (yet) that does. I did find one post that discussed the algorithms used in DIAdem Crash Analysis (originating from the NHTSA?) that gave a very good discussion, but this is specific to Crash. Is there a similar paper for the algorithms within DIAdem? Yes, I have run the same data through both DIAdem and an app we currently use and the results are very close, but this anecdotal evidence is not enough to satisfy the folks I work for. Can someone point me in the correct direction? Thanks!

Hi,
DIAdem is using several different FFT algorithms, depending on the version of DIAdem and the mathematical function. The basic FFT, witch is calculating the real/imaginary part out of the time signal, is well defined. Each algorithm gives almost the same result. There are only very small differences on the last bits of the float values. The basic FFT algorithm is usually not very large. It is easy to use different functions or libraries depending on the needs. The results have to be the same in all cases.
DIAdem 10.2 is using a new algorithm which is able to do FFT calculations with any number of values, not just the power of two. This algorithm is also used in other NI-products like LabVIEW. A large afford is going into the quality and speed of this algorithm because not only the simple FFT but also a number of additional functions like the sound and vibration toolkit for LabVIEW is depending on this.
The difficult part, when it comes to comparison between DIAdem and other FFT calculations, is always the large number of options. You need to know the number of values, sampling frequency, window function, window correction and the averaging. You can calculate peak, rms or power spectrum and so on. Depending on the options, you can get very different but still correct results.
Crash is much more a question of standards. Starting with sampling frequencies and ending with precise defined algorithms to get a result like the HIC-value witch has to be reproducible and comparable between cars from different vendors all over the world.
As soon as you start to do real world FFT calculations there are so many options and possible ways do get the results you need, that it is impossible to discuss all of them in a documentation of a Software like DIAdem. You could write a series of books about this.
If you have specific questions about the FFT results, you can give it a try and ask on this forum.
Ulrich Bierwisch

DIADEM 8.1 millisecond patch

I have installed the recent DIADEM 8.1 patch. Supposedly it enables the DATA view to display milliseconds when importing and ASCII file but it does not seem to work. Has anyone been able to make this work. I have attached a sample data file alongs with it's STP file.
I also would like to export my timestamps with milliseconds to an ASCII output file. Can this be done?
Attachments:
09_26_02_14_55_37.txt ‏8 KB
can_ub_MSec.STP ‏2 KB

Hi Craig,
The DIAdem 8.1 Service Pack 1 enables DIAdem to accurately read in Date/Time columns with fractional (milli-) seconds from ASCII files. It does not enable the channels in DATA to reflect this correctly read value-- they still display in DATA rounded to the nearest second.
But the millisecond values are there, and you can verify this for yourself by graphing the data and noting that you get multiple data points between integral second values on the X axis. You can also change the format of the Date/Time channel in the DATA Channel properties tab from "Time" to "Numeric" and directly see the correct fractional seconds.
The DIAdem Date/Time format stores the number of seconds which have elapsed since 0 AD as a double precision (8 byte) real
number. So any non-integral values are indeed fractional (milli-) seconds. Bear in mind that with this approach the best accuracy you can get in our century is about 0.1 milliseconds.
Regards,
Brad Turpin
NI

SQL Server Memory Usage Peaks to 95% and its not releasing SQL 2012

We are currently running SQL 2012 64 bit, Lock Pages Enabled, 128 GB. We allocated Max Memory 112000, Min Memory to 0. We have a SQL Maintenace Job which backs up (Full Backup) of our server around 11PM at that time the SQL Server memory peaks to almost
96% even during full business hours we are constantly in the range of 56 to 60% but after 11PM within 10 minutes of the job it peaks to 95 or 96 Percentage and even after the job completes it's not releasing the memory back. I have to manually shut the sql
service and then restart at that time it comes back to normal.
Any suggestions/any help really appreciated.

Here are the details Memory is at 96% I still didn't restart...Please any help appreciated...The memory detals is for 24 hours I restarted the service around 11AM before I posted my previous message..
Memory Used by SqLServer: 119329
Locked Pages Used SQLServer : 105969
Total VAS in MB : 8388607
Process Physical Memory Low : 0
Process Virtual Memory Low : 0
Max Memory set to :112000
Out of 128 Memory Last 24 hours the memory usage in %
Percent Memory Used - Total Memory is 128.0 GB
Last 24 Hours
DATE / TIME
Memory Used
19-Dec-14
11:46 PM
96.24659602
20-Dec-14
12:46 AM
96.24578349
20-Dec-14
1:46 AM
96.25146739
20-Dec-14
2:46 AM
96.24345652
20-Dec-14
3:46 AM
96.27311834
20-Dec-14
4:46 AM
96.28947067
20-Dec-14
5:46 AM
96.18931325
20-Dec-14
6:46 AM
96.09323502
20-Dec-14
7:46 AM
96.07915497
20-Dec-14
8:46 AM
96.07906977
20-Dec-14
9:46 AM
96.0784111
20-Dec-14
10:46 AM
96.07415009
20-Dec-14
11:46 AM
26.03422141
20-Dec-14
12:46 PM
33.57474359
20-Dec-14
1:46 PM
39.466561
20-Dec-14
2:46 PM
41.85940742
20-Dec-14
3:46 PM
43.89071274
20-Dec-14
4:46 PM
45.80877368
20-Dec-14
5:46 PM
46.49493281
20-Dec-14
6:46 PM
46.68486468
20-Dec-14
7:46 PM
46.69701958
20-Dec-14
8:46 PM
46.69994736
20-Dec-14
9:46 PM
57.5012455
20-Dec-14
10:46 PM
96.25695419
I verified its a sqL job and still my memory is 95%
It peaeked at 10:46PM and here are the details of the SQL job which started at 10:30
Progress: 2014-12-20 22:30:04.39
Source: Check Database Integrity Task Executing query "USE [DATASTORE] ".: 50% complete End Progress Progress: 2014-12-20 22:43:06.10
Source: Check Database Integrity Task Executing query "DBCC CHECKDB(N'DATASTORE') WITH NO_INFOMSGS ".: 100% complete End Progress
Progress: 2014-12-20 22:43:06.11 Source: Check Database Integrity Task Executing query "USE [ETL_Proc] ".: 50% complete
End Progress Progress: 2014-12-20 22:46:52.56 Source: Check Database Integrity Task Executing query "DBCC CHECKDB(N'ETL_Proc')
WITH NO_INFOMSGS ".: 100% complete End Progress Progress: 2014-12-20 22:46:52.64 Source: Back Up Database Task
Executing query "EXECUTE master.dbo.xp_create_subdir N'P:\SQL_Backu...".: 20% complete End Progress
Progress: 2014-12-20 22:46:52.64 Source: Back Up Database Task Executing query "EXECUTE master.dbo.xp_create_subdir N'P:\SQL_Backu...".
: 40% complete End Progress Progress: 2014-12-20 22:46:52.64
Source: Back Up Database Task Executing query "EXECUTE master.dbo.xp_create_subdir N'P:\SQL_Backu...".: 60% complete
End Progress Progress: 2014-12-20 22:46:52.64 Source: Back Up Database Task
Executing query "EXECUTE master.dbo.xp_create_subdir N'P:\SQL_Backu...".: 80% complete End Progress
Progress: 2014-12-20 22:46:52.64 Source: Back Up Database Task
Executing query "EXECUTE master.dbo.xp_create_subdir N'P:\SQL_Backu...".: 100% complete End Progress
Progress: 2014-12-20 22:46:55.63 Source: Back Up Database Task
Executing query "BACKUP DATABASE [ReportServer] TO DISK = N'P:\SQL...".: 100% complete
End Progress Progress: 2014-12-20 22:46:56.55 Source: Back Up Database Task
Executing query "BACKUP DATABASE [ReportServerTempDB] TO DISK = N'...".: 100% complete End Progress Progress: 2014-12-20 22:46:57.35
Source: Back Up Database Task Executing query "BACKUP DATABASE [dbamaint] TO DISK = N'P:\SQL_Bac...".: 100% complete End Progress
Progress: 2014-12-20 22:51:13.08 Source: Back Up Database Task
Executing query "BACKUP DATABASE [DATASTORE] TO DISK = N'P:\SQL_Ba...".: 100% complete End Progress
Progress: 2014-12-20 22:51:52.72 Source: Back Up Database Task
Executing query "BACKUP DATABASE [ETL_Proc] TO DISK = N'P:\SQL_Bac...".: 100% complete End Progress Progress: 2014-12-20 22:51:54.87
Source: Rebuild Index Task Executing query "USE [ReportServer] ".: 0% complete End Progress Progress:
2014-12-20 22:51:54.88 Source: Rebuild Index Task Executing query "ALT... The package executed successf... The step succeeded.

How is the integral calculated within Biobench

I am attempting to finish my thesis, and I can not find any literature on how the software calculates the intergral. Is the software utilizing continous analogue integration, constant reset time integration, or constant reset level integration? What value is it using for this?

Hi,
Please take a look at the attached spreadsheet. This calculation is based on the sample RLC Circuit which is located in the Samples Folder >> Analysis >> Monte Carlo Analysis.
In essense the Sigma value is based on the Output Y Value and it shows what the peak value is on a specified distance from the calculated sigma of the entire data.
Hope this helps.
Regards,
Tayyab R,
National Instruments.
Attachments:
Monte Carlo Results.zip ‏9 KB

Peak Integration in Diadem

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