LabVIEW
2d Gaussian Fit Problem.
Solved!
You don't need to interpolate the data into a regular grid, all you need is fit for the existing points.
Have a look at my old example here (look for the "random" option.
Your attachment is missing quite a few subVIs. can you attach them too? Thanks!
OK, I quickly modified my old example and it seems to easily fit your raw data. See attached (LV2010). Modify as needed.
(Note that I define the width as "width at half heigh", your definition might differ.)
@Tim_W wrote:
The new gaussian peak fit vi has several nice features such as choice of fitting algorithm, entering pre-determined parameters or bounds, etc. Would it be possible to use it in your gaussian fit program and if so, could you show how to make the modification?
Which "new gaussian peak fit" are you talking about?
You would enter paramter guesses in the controls already given.
If you want to set paramter bounds, substitute Constrained Nonlinear Curve Fit VI and add a control for the additional inputs.
What other fitting algorithms do you have in mind?
@Tim_W wrote:
Under Math VI\Fitting VI\Gaussian Peak VI. I'm not sure how new it is-it's new to me, but may have been around for awhile.
This is only for a plain 1D gaussian, not 2D as in my example above.
The "Constrained Nonlinear Curve Fit" mentioned above also has inputs for the "method", so you should be able to do whatever you want (method, paramter bounds, etc.) once you supply a model.
@MateusV wrote:
I'm trying to open your vi. but what is on the 3D tab is not loading.
What can I do?
What is "not loading"? Can you be more specific?
We should keep all this in one place, so let's continue the discussion here.
