Higher order spectral analysis

hi all
Has somebody implemented a labview version of bispectrum, cyclostationarity and other hosa tools?
Is NI planning to add a HOSA toolbox for Labview?
Thanks in advance
Alipio
"Qod natura non dat, Salmantica non praestat"

Hello Alipio,
I'm not aware of any toolkit that covers that area. The most similar toolkit NI provides is the Signal Processing Toolkit, and you can see its features here:
http://www.ni.com/pdf/products/us/4msw69-70.pdf
If this doesn't satisfy your needs, I would:
a) Search Alliance Members with signal processing knowledge. You can look here:
http://www.ni.com/alliance
b) Search other parties tools. These 2 links may help:
http://c.webring.com/hub?ring=labview
http://directory.google.com/Top/Computers/Programming/Languages/LabVIEW/
c) Use already coded external code (DLLs, etc..) that implement the algorithms.
Good luck !
JorgeM.

Similar Messages

Bode plot of higher order system

Hi,
When I am going to bode plot of higher order system i.e. order of 529. It shows "Error -20068 occurred at NI_LinSys_LinSys Conversion.lvlib:CD Convert TF to ZPK (LinSys).vi" and "Possible reason(s): Analysis: Input parameters has at least one element that is Inf, NaN, DBL_MAX, or DBL_MIN".
It will be helpful if kindly send me the solution. One example I have attached here.
Attachments:
Untitled 2.vi ‏88 KB

please help me out of this problem

Country of Delivering Plant is not showing in Sales Order Pricing Analysis

Hello All,
I have created a new condition table with the field Country of Delivering Plant (KOMK-WKCOU).
But in the sales order pricing analysis this field is not fetching the country of the plant (it is showing the Yellow color exclamation icon).
This is a standard field, I am not able to understand why it is not fetching this field.
I have used the same field for tax condtions in my previous projects as well, there it worked well.
Even I have activated the KOMK structure in SE11 also, but still the same problem.
Can anybody tell me how to resolve this issue.
Thanks & Regards,
Sreehari.

Rightly suggested by Shiva.
As plant determines at item level.
So, instead of KOMK-WKCOU, field should append in KOMP.
FYI, for checking any inconsistency in condition table, you can use TCode VK+C.
Regards
JP

8051 based spectral analyser

Greetings,
I am working on a project that consists in creating a spectral analyser for the power line using the 8051 and the ADC0808 for analog to digital conversion. In the LabVIEW I am trying to sample the waveform of the power line and use the FFT algorithm to perform the spectral analysis with 0Hz to 2.5kHz of range.
Do you think that is possible to use this uC with no problems to perform this application with the Instrument I/O Assistant? Here is the screenshot that what I am trying to do.
Observation: The frequency of the desired signal that I am trying to sample is equal to 60Hz and the ADC0808 has a conversion time equal to 100us.
Thanks,
FBorges22
Attachments:
Spectra.PNG ‏32 KB

Borges -
The I/O Assistant is used to help you establish communication with serial, GPIB, Ethernet devices. It does not, however, process signals in any way. You should be able to establish communication without any problems using the I/O Assistant.
To perform an FFT analysis of your signal, you will need to use one of the many signal processing VIs in LabVIEW. There are express VIs that do Spectral Measurements as well.
I hope this helps
Bruno Noronha
Bruno Noronha
Certified LabVIEW Associate Developer
Using LabVIEW 8.6

Spectral analysis of an acquired signal

Hello there,
I am trying to acquire a signal for spectral analysis. I have set the analog input VI to 1Chan/NSamp/Dbl format, and fed the data to the express spectral analyzer VI. The VI is set to acquire arrays of 100 samples length, before feeding it to the FFT VI. The problem is, however, that the waveform graph I use to present the spectral distribution shows spectral analysis for a bandwidth of 0.5 Hz only (0 to 0.5 Hz), and I have no clue why this happens. I am sure there is something I do not know about how to set the application to go right.
P.S. I have also tried the low level FFT VI, the wavegorm graph shows a bandwidth corresponding to the number of samples being acquired at each iteration, (100 in my case), which really confuses me. I have looked at the examples, and none of them uses DAQ for FFT, they all use signal generators which work fine with me.
Does anyone have an idea of what I am doing wrong, any help shall be greatly appreciated...
Thankyou for your patience,,,
Bedair

Hello there,
Attached is a sample code of my problem, please note that I use LabVIEW 8.0
Thank you for your help,,,
Bedair
Attachments:
sample_code_fft_noise1.vi ‏86 KB

Remove blue line in spectral analysis; paintbrush not selectable

I'm trying to remove a persons talking from a sound file. His talking shows up in spectral analysis as the color blue. Is there some way to select and mute it? The paintbrush is not selectable, tried to do this manually. Audition clearly identifies the speaking, so if it could be removed, that'd be great.
Thanks

Sounds like you may have "Spectral Pitch Display" on, which draws a blue line for pitch correction and analysis, but does not expose the selection tools as you've seen. Just turn on standard "Spectral Frequency" view and the paintbrush and other spectral selection tools will be enabled. (You can click the left-most Spectral button in the tool bar, or just use the SHIFT+D default shortcut)

How to implement exist some x, all x these higher order logic in F#?

http://www.cl.cam.ac.uk/~mjcg/OGI/Notes/HOL.pdf
how to implement exist some x, all x these higher order logic in F#?
where can find the example of open source code have these implementation?
computing nightmare

i do not know the whole code.
i just imagine all x is just a full one in logic table
i guess that there are two cases
for example,
case 1
Or(All x, B)
1 0 -> 1
1 1 -> 1
1 0 -> 1
1 1 -> 1
case 2
All x such that B and C
v x And(B, C)
And(Or(v x , B), Or(v x, C))
1 0
1 1
1 0
1 1
becomes
1
1
1
1
but all these just my guess, i still do not know how all x works in logic table
is there open source example code in github show all x and exist some?
exist some in logic table
0 or 1 or 1 or 1
1 0 1 1
1 1 0 1
1 1 1 0
computing nightmare

Generics for Higher Order Function Support

Perhaps I'm not looking hard enough, but it seems that all arguments for generics relate to containers. Has anyone considered the impact of generics and at least rudimentary type inference on higher order function support.
Consider the case in which you want to execute a particular operation under time constraints, or with specified cleanup operations to occur afterwards, for example:
interface DBOperation
void doOperation(Connection con);
void DoDBOperation(DBOperation op)
Connection c = acquireConnection()
try
    op.doOperation(con);
finally
    c.release();
}One would then call:
DoDBOperation(new DBOperation() ...);Now what happens if I want to make a DBOperation that returns an integer and throws a specific checked exception. I would need to define an alternative DBOperation2 class, and rewrite DoDBOperation for each possible permutation of checked exceptions, and for each return type.
Or one would just have:
interface DBOperation
Object doOperation(Connection inCon) throws Exception
}But now when I call it, I need to catch Exception, not just the ones I specifically throw, and I have to cast the return type.
Clearly, a generics mechanism with type inference could infer the appropriate throws and return type for the DoDBOperation call, given the compile-time type of the parameter.

Ahh, i think I'm starting to see. My guess is that to achieve that in the current generic Java proposal, it would need to look something like:
public interface OperationInterface<T extends Object, X extends Exception>
   <T> doOperation() throws <X>
public class LoggedOperation<T extends Object, X extends Exception> implements OperationInterface<T, X>
OperationInterface<T, X> delegatee;
public LoggedOperation<T extends Object, X extends Exception>(OperationInterface<T, X> d)
    delegatee = d;
<T> doOperation() throws <X>
    logStart();
    try {
      return delegatee.doOperation();
    finally {
      logEnd();
Or somesuch. The important thing to note is that the genericity is on the objects, not on their methods. So it can behave a little like you suggest, provided the class is created properly in the first place.
Note: I haven't tried the demo version of the generic compiler, so I'm sure every line of that code is wrong.

Spectral Analysis using Lightroom

A bit of an odd question, but I would appreciate any help.
Is it possible to use Lightroom as a spectral analysis program for standardized images?
For example:
I have numerous standardized images of geological samples. Some are lighter, some darker depending on the makeup of the sample. Can I export the spectral histogram from Lightroom as a data point for the composition of each sample? Is there any way to access the histogram/spectral data in a way that allows it to be quantified and placed into a database?
Thanks for the help!
-Marshall

The histogram is based on Melissa RGB which is ProPhoto RGB primaries with a gamma (TRC) of 1.0 which isn’t easily exported so I doubt this is going to be useful to you. The histogram (here or in Photoshop etc) are not based on spectral data anyway. This is probably more useful for you:
http://store.rmimaging.com/spectrashop4.aspx

Could I do the spectral analysis of blood pressure data only use your software?

Dear,
I am doing an experiment about baroreflex (Blood pressure reflex) using a system of PowerLab (ADInstruments). I have many data that I want to do Spectral analysis and try to find specific software to do that. I found from literature that you may have a software (LabView?) could do spectral analysis of blood pressure. If so, could I do the spectral analysis only use your software?
Thank you,

Hello mlin,
LabVIEW can interface with your transducers using hardware. Once the acquisition is over, LabVIEW can get the data and convert the time information into the frequency domain so that you can see the amplitude of each of the frequencies involved with the signal. I am just curious about the equipment you will be using. You will need some data acquisition cards that have drivers for LabVIEW unless you are just getting the information from a desktop instrument. If you are using a desktop instrument, then LabVIEW could send the commands to automate the process. I hope this answers your question.
Steven T.

Production order costs analysis

Cost anlysis of my production order looks like this
http://img116.imageshack.us/my.php?image=troskovimojizo6.jpg
but it should look like this acoording to bpp and configuration guide for my proces (discrete manufacturing).
http://img393.imageshack.us/my.php?image=troskovidedalf5.jpg
I have a problem with lines 3,4,5,6,7 (lines with cost element 62100 and 841...), I don't know why they are shown in my list. If any one know how to solve this problem and remove these expenses pls help.
Thank you all.
Uros

Hi,
Iam not able to open your link.(this link is blocked by our system admin..) Please write your problem. what type of expenses is comming to your production order cost analysis report ?
Regards,
Naresh.

Higher order function and threads

Does anyone knows if I define an interface ApplyObj with a binary function f as it's only method; the binary operator that we want to pass as an argument into the reduction is then declared as a class that implements this interface. How to I do that??
Taking example.
applic is the function to excute. and this applic can store instructions to add, concat or minus. Then I have this set of array which can be alpha or int array, passing the function in, it's suppose to create threads to get the result
e.g array[3] store [0]= 2 [1]=4 and [2]=8
after the first round will result to array[0] and array[1] to add each other and result stored in [0]. since [2] does not have a neighbour [3], [2] after step 1 still have the value of 8
then step 2 will result to [0] which stores the step 1 results which is 2+4=6, [0] will then add with [2] and the final results [0]=14.
Just how can I program like this?
1st can anyone tell me... how to decipher a higher order function that is pass in as a object?
Thanks

Sounds to me like you want this:public interface ApplyObj
    public int[] applic(int[] args);
}Then e.g.public class Add implements ApplyObj
    public int[] applic(int[] args)
        int[] result = new int[(args.length + 1) / 2];
        for (int i = 0; i < args.length; i += 2)
            result[i / 2] = args[i] + args[i + 1];
        // Deal with the last element of an odd length array
        if (args.length % 2 == 1)
            result[result.length - 1] = args[args.length - 1];
        return args;
}Warning: this code is untested. Note: pizza is a superset of Java which has proper higher order functions. Maybe you should use that instead.
Answer provided by Friends of the Water Cooler. Please inform forum admin via the 'Discuss the JDC Web Site' forum that off-topic threads should be supported.

Audition's Spectral Analysis Bug

Hello there, 'ive been using audition for a short period of time and i've found it one of the best recording/editing softwares i have ever used. Anyway, there's something on the spectral analysis window that is bothering me. I don't if it's just some configuration that is messed up or if it is the fact that i'm new to it, but it appears nothing, just a white and stuffless window. I'm attaching a .jpg so you may undestand the issue.
How could i fix this issue?

If you wouldn't mind sending me a quick info file from Audition, I may know the cause of that problem. In Audition, if you click Help > About Adobe Audition and click the SYSTEM INFO button, it will write out a text file with some information about the installation. If you could send that as an attachment to [email protected], I'd appreciate it very much. I'll be better able to verify if what we believe to be the cause of the effects issue you describe is in fact relevant to your installation.
Thanks in advance,
Durin

Spectral analysis?

what are people using for spectral analysis in logic express. ive tried searching the internet and cant find any good options. obviously it needs to be au and since im running intel it also needs to be ub. oh yea and free would be pretty nice too. haha.

I was using Inspector. It's still free.
http://www.rogernicholsdigital.com/inspector.htm
Dual 2.5Ghz 2004; 2.5GB RAM Mac OS X (10.4.8)

Production order varience analysis

Hi experts,
While doing the production order varience analysis, I was checking the cost analysis in some orders all the data is perfect i.e. material consumption and Machine hour rates but still that order is showing positive varience under *Reciept to orders* Can you please tell me from where this cost is getting captured.

Narayan,
It would be good if you can share the screen shot of the cost analysis of order for better understanding of the problem. You can post the screen shot in some of the websites and share that as a link here or else please send me to my mail Id which you can take it from my profile.
Regards,
Prasobh

Higher order spectral analysis

Similar Messages

Maybe you are looking for