Problem of Fit 2D Gaussian.

I have a 2d Gaussian curve fitting problems.

I have a set of data: with 3 columns and rows of N. For example

x y intensity.

..   ..      ..

N is the same for all 3 columns. I'm trying to create a plot intensity out of these data and adapt a 2D Gaussian to it.

I tried to do a polynomial interpolation of the intensity of data on the x - go and carry out a plot of intensity (do not know if there is a better way to do it! Please Suggest if there is nothing else.).

Then I use the Levenberg-Marquardt method to adapt to these data. For some reason, it does not any iteration estimation. The best value of adjustment is the same as the estimate. There is shoing error: NI_Gmath.lvlib:LM is coefficients.vi:1 again. (see attached screws)

Can someone help me with this!

Thank you.

OK, I quickly changed my old example and it seems very easily mount your raw data. See attached (LV2010). Modify if needed.

(Note that I set the width as 'width at half the height', your definition may differ.)

Tags: NI Software

Similar Questions

  • Problem with mask effect Gaussian blur

    Greetings! I've seen discussions where people had various problems with the following mask in Premiere Pro CC, but I had not seen this issue discussed, so I hope it's just a user error.

    I have a video where I need to blur the faces of several people in it.

    1. I applied Gaussian blur effect to the clip and used the tool free draw draw around A person's head.
    2. I have enabled the button animation next to the mask path label and then played the clip for some time.
    3. Then when his head would move out of the effect mask that I created, I would pause, add a keyframe and click and drag in the middle of the blue mask, that I had done in the program monitor, dragging on his head.

    Everything was fine. I did this several times.

    Then finally I suspended and made a keyframe, and suddenly the blue lines for the mask disappeared! You could still see the effect, but I could capture the effect is more and adjust it.

    Anyone has an idea why the blue lines for the mask suddenly stop appearing in the program monitor? This has happened several times, and I can't understand what the problem is. Thank you!

    Furthermore, I had already tried the mask tracking tool and he was not coherent enough, that's why I'm doing it manually.

    Select the mask in the Panel for the outline to show effect Options.

  • MS Outlook icon / shortcut icon problems

    I'm trying to figure out what I did to corrupt my MS Outlook icon.

    I know that I myself asked the problem dragging MS Outlook since the MS office folder in the start/programs menu on my desktop to create a shortcut. I tried dragging the icon in the start/programs menu folder, but that did nothing.
    Currently, the Outlook icon is the icon of the generic program. In addition, Outlook is no longer present in the start menu in the program folder. The program itself works very well and its icon is currently on the desktop (I found this by doing a search windows and creating a shortcut from there. This icon in the windows search is also messed up).
    I don't know how to get back on this problem. Fitness is not an option, nor is the system restore (because there is no restore points).
    Thank you!

    Hello

    I suggest you that you rebuild icon cache.
     
    a. Click Start, click Control Panel, and write in the search options for files box.

    b. now, click on Folder Options to open and select folders and hidden files (dot).
    c. open a Windows Explorer window.
    d. go to C:\Users\(User Name) \AppData\Local
    e. right click on IconCache.db and click on delete.
    f. click Yes to confirm the deletion.

    NOTE: This removes the file to the trash. It is safe to empty the trash when you are done.

    g. close the window.
    h. emptying the trash.
    i. restart the computer.
    j. When you come back, you will notice the size of the file IconCache.db is reduced, and the update is now the current date.

    NOTE: If for some reason any IconCache.db isn't there or the size has not much changed then you can just restart the computer again. You may need to restart a few times in some cases.

    k. cache icon goes rebuilds.

  • Histogram

    Hello

    I'm trying to generate a histogram of data from the oscilloscope. The data is a kind of noise. The problem is that the data is already bin - ed the oscilloscope and the binning is not constant. If I can use a histogram, the output will be largely dependent on the binning in the histogram. If I have for example the binning set wrong, I couldn't see some vertices or I could see a fall somewhere, just because a histogram bin counts 2 buckets of the oscilloscope and the other a 3 bins of the oscilloscope. Later, I get a Gaussian of the histogram.

    My question: is it possible to do a histogram on the data I receive directly from the oscilloscope, without attributing bins? And I can still fit my Gaussian data?

    Best regards

    Lorenz

    Edit: So I want to essentially circumvent the problem of interference between the 2 offering.

    I would now like to accumulate all the data points have the same value and get a distribution from that.

    OK, now I understand! I would call it a histogram without binning-extra:

  • Tecra R840 - upgrade to i7 2720QM

    I'm going to by a Tecra R840 with i7 2620M processor. Is it possible to switch to an as the i7-2720QM quad-core processor?

    Hello

    Update CPU is delicate. No one can tell if your laptop would be stable after this upgrade.
    There may be a compatibility problem between the processor and BIOS or higher heat dissipation may lead to a higher temperature

    But in General, you can use the CPU that is supported by the chipset of the motherboard.
    If the chipset would support the new processor so you chances to get this quick.

    It seems that both processors support the same socket, so it shouldn't be a problem to fit the CPU on the mobo
    http://Ark.Intel.com/Products/52231/Intel-Core-i7-2620M-Processor-(4m-cache-2_70-GHz)
    http://Ark.Intel.com/Products/50067/Intel-Core-i7-2720QM-Processor-(6m-cache-2_20-GHz)

    But why do you need new CPU?
    The Intel Core i7 2620 M is really a good processor and the portable disasembling means you lose the warranty!

  • Fan replacement for Satellite A300-1 ms

    Hi guys,.

    * Do you know some reliable online stores where I can buy a fan for Satellite A300 *-model 1MS? *
    Where do you buy most of the parts for your used laptops?

    Here are two stores I found, but I have no idea if they are trustworthy or not.

    I've seen a lot of sites that say A300 but the case is silver metal and the original is black plastic.
    The plastic or metal is not a big problem I'm worry about a problem of fitting.

    Thanks for any help,
    S

    + The message was edited: link has been removed - commercial +.

    You can order each part of the Toshiba laptop computer of authorized service provider available in your country. The ASP should be able to provide this part even if the laptop belongs to an old series laptop.

  • Update on power supply or not?

    Hello, I have a stock e9220y

    http://support.HP.com/us-en/document/c01859815

    I bought a radeon HD 6670 to improve my graphics performance, I asked on several forums or not I should improve my diet, on site AMD it says 400w min, but mu PC has a low CPU power and apparently is not to start with a lot of power to draw. It uses a model Liteon PS-5301 - 08HA PSU is now estimated at 300w. Also, if I buy a new power supply I want to buy one that fits without any problem. Fit this http://www.newegg.com/Product/Product.aspx?Item=N82E16817139026 ?

    Thank you

    Yes, the power supply must meet the requirement of minimum power of the graphics card. If not, the system cannot start, may start but not enter Windows, can start and later enter Windows but accident.

    Frank

  • HP laserjet pro 400 m401 dw - how do you get to recognize the second impression tray?

    We just bought this printer about a month ago, and we love it, so we bought the second tray (or drawer, however you want to think of it) because my biggest complaint every day is reload the paper trays. WE have tried everything we can think of to get the printer to recognize the second tray and pull the paper away when the first is empty, but its does not work. It's like we bought it for no reason. Anyone know how to make it work? Thank you

    You must distinguish between the following:

    • Printer - does the printer itself knows that the tray is present? Check by printing a report 'configuration', or by checking the settings with the built-in Web server. If the tray is not recognized, this implies a physical problem with fitting tray, etc.
    • Of the computer - the printer driver on your system knows that the additional feeder is available? On a system Windows, look at the device settings tab in the printer properties dialog and check the extra tray is set to installed and not installed.
  • Unable to decompress Fusion order demo

    Hello

    I downloaded the file FusionOrderDemo_R2_1_revised.zip of URL here: http://www.oracle.com/technetwork/developer-tools/jdev/index-095536.html look like the zip file is corrupt, I get the following error message "the compressed (zipped) folder is invalid or corrupted", tried several times. Anyone this file downloaded and unzipped successfully.

    Concerning
    Surendra

    Published by: user3228460 on March 27, 2012 23:56

    Try another zip (e. g. 7zip) program. One of my developers had problem also fits with the default windows zip program.

    Timo

  • Function problem made Gaussian Peak.

    Hello, everyone:

    I have a problem, the buffaloes me completely. I am collect a signal of the spectrometer, and then use PIC finder to find peaks and fix them with the Gaussian curves. And that part works fine, when I tweak estimate. Next thing I've tried is to let a user choose a pic that he or she wants to adapt. Basically, I did the same thing previously, except that now it's the positions of the peaks set by the user, who are sent to Gaussian PEAK function to adapt. And here's the problem: Gaussian peak function simply do not Fit all incidental, it only to generate curves Gaussians, located at home position with initial amplitudes and the initial width. I tried everything I could think of, but nothing helped. I even tried to provide the function with a manually - set data it worked! But in my code it does nothing!

    Any ideas how this can be possible?

    Thank you very much for your help!

    Kirill

    Please form an example of ready-to-run, not a Subvi. None of your controls contain typical data.

    It seems that your data have a large lag there, but your so fixed zero offset adjustment. You need modify the setting limits and define the limits of the offset of 0.0 to inf /-inf.

    Easiets would be to right click on the entry of "limits" and "create a constant." Change it now, of zeros - inf and inf, respectively.

  • Problem with the latest patch, Mozilla does not fit on 1024 * 768

    Today (13/07/04) once the patch of Mozilla, the display of the Explorer to expand. I use 1024 * 768 on desktop. Now I have to scroll sideways to see the full page...
    Please solve this
    Thank you

    Yes, it wasn't a problem in earlier versions and the display size was independent of the settings of your system. However the arrival of high-resolution poster has necessitated that firefox now follows this convention, otherwise, it would be unreadably small on such systems...

    something you can try if you want to set the size/pixel density of the text in firefox is different from the settings in your system as it has been addressed in previous versions, enter on: config in the address bar of firefox (confirmed the message information where it appears) and search for the preference named layout.css.devPixelsPerPx. Double-click it and change its value to 1.0 (or any zoom factor that fits your needs: 1.0 corresponds to 100%, 0.8 is equal to 80% and so on;-1.0 is the default and will comply with the configuration of the system).

  • I'm having problems to make one of the 3rd party fitness on my watch applications

    I'm having a lot of trouble getting my watch to load up one of the applications of 3rd party fitness. Apps for example Strava & Wahoo fitness... In particular, two applications have support iwatch announced when download you from the App store. You don't know if there is a problem with my watch or not because I recently bought a wahoo HRM ability that has the Bluetooth, etc & I paired with my phone, but trying to make a pair of Bluetooth with my watch looking for Bluetooth 'of health devices"it captures anything. I tried to obtain the support of Strava thinking it was their app, but I did exactly what they said to do IE désapparier shows, to remove and reinstall app & his continues to do exactly the same thing. Both apps show on my watch, but when I select to load just makes the circle of reflection and then the app is de-energized so it brings back me to the screen of application on my watch. I've updated my privacy settings to let my watch & the apps read each other, but still does not.

    Hello

    If you have not already done so, it can help to upgrade your iPhone and Apple Watch to the latest version of the software.

    If not, try the following steps, trying to open the application after each:

    • Place your Apple Watch on its charger with power connected and also connect your iPhone to the power.
    • On your iPhone: open the music application and start playing a song (through your iPhone pregnant is fine).
    • On your iPhone, in the application of the watch, go to: My Watch (tab) > scroll down and tap the name of the application that does not open > turn off the option to show App on Apple Watch > to pause for a few moments > turn on the option.

    If this does not resolve the problem, the other recommended steps is trying to disconnect and rematching of your watch. As you've already tried this, you can ignore this:

    More information:

    Get help with applications on your Apple Watch - Apple Support

  • Fit Gaussian Peak and non-linear curve Fit on small data differ from the PEAK of origin made

    Hi all

    I'm developing a program in which I have to adjust the curve of Gauss on only 4 or 5 data points. When I use the Gaussian Ridge Fit or adjustment of the curve non-linear, it connects linearly all the points so that other editing software like origin's curve fitting of Gauss on the same set of data that I have attached two images is LabVIEW with Fit Gaussian of Peak and nonlinear adjustment and other is original.

    The data are

    X                       Y

    799.09857 257
    912.25256 641

    1026.00366 1516
    1137.92871 1118
    1253.43713 329

    Interesting.

    The initial default values assume all are NaN, which causes the LV calculate conjecture.  The default values for the parameter Bounds +/-Inf with the exception of the offset that are both zero. This, of course, forces the output zero offset.  It seems a strange fault, but they may have a good reason for it.

    Change the limits of compensation to something else translates the output being offset ~ 215 and the Center moves to ~ 1053.  These correspond the original result to 5 significant digits.

    Lynn

  • Problem: Fitting Lev - Mar with error function

    Hello world

    I have very little experience with LabVIEW and I try for the first time to do some non-linear curve worthy data that I have.
    I've searched the forums for almost a day and could not find what I need. The problems are:

    (1) I need to fit to a function of the following type: P = Po/2 - in / 2 * erf (sqrt (2) *(x-xo) w), where the Po, xo and w are my settings.

    But in my error2.vi, I can't tie my y = sqrt (2) *(x-xo) variable w of the iron works at the entrance, because the erf.vi does not table 1 d as input and which gives as output as well. The output is another problem, as F(x,a) entry must be a 1 d array.

    (2) I read on the nonlinear CurveFit VI of Lev - Mar and I think I what to do. However, an I had problems in the wiring of my static VI reference to the F(x,a) entry in the Lev - Mar VI and it does not give me a cut wire only when I reference a strictly "VI reference typed". What does that mean? Why it works only with who?

    I know these are pretty basic doubts, but I tried to figure it out for some time and could not achieve.

    Thank you.

    PS * the fitting function (Subvi) is the error2.vi file.

    Try this. Seems to work very well (LabVIEW 2013).

    (do not try chart the best settings, graphics the best out of shape!)

  • 16 GB SanDisk Cruzer Fit format problem

    Hello

    I have a 16 GB Cruzer Fit that I use mainly for mp3 playback on my car front loader. It works well for about a year already in the front loader.

    I was messing around trying to make a live windows bootable flash drive that invovled using "save to usb" shaped applications on the Cruzer. Once I did experiences I wanted to use it as a MP3 flash again for my car player. So I used Windows 7 tool for native format format in FAT32 before you put MP3s on. The mp3s are back on the new format Cruzer 16 GB but the front car charger now won't recognise the player more.

    I think that the problem was caused by the different formatting, tools I've used. Is it possible to get the drive to its original state?

    OK, I got it thanks for the help to work.

    I had a 2nd 16 GB Cruzer made which was already working so I used an app "Disk HARD RAW COPY" to clone the USB drive to work that did not work.

    The application of available freeware here: http://hddguru.com/software/HDD-Raw-Copy-Tool/

    This developer has other cool apps also along these lines.

Maybe you are looking for