FWHM with peak detector

[amezam]

Hello Cursor,

You would need to read the values from the file using the File I/O functions and then use a for loop for to calculate the FWHM to each of the values. Is that somehow what you're planning to do?\

Regards,

[cursor index use]

actually i am trying to find any method which will calculate the FWHM of all the peaks at a time if not i iwll take one by one and calculate but please tell me how to calculate the FWHM for a peak how to fit the gausian and lorentzian fits if possible send any example program or pic of the block diagram so that i will undertsand. 

[amezam]

Hello Cursor,

It seems LabVIEW does not have a function that does that, but there some ways you could integrate in a subVI and pass all the data to it. In this forum, there are three links to posts where they describe how to do it.

Best Regards,

[cursor index use]

 ok  atleast tell me how to find a FWHM for a peak and how to find the Q factor for a peak. 

[amezam]

Hi Cursor,

The intention of our support is to assist you with specific questions related with National Instruments solutions. Based in the information that I have given you so far, I believe you can start developing your application. In the forums linked above, there are methods on how to calculate the FWHM and you can follow the examples Read from Text File. vi and Read Data from XML File.vi (Example Finder>>Search and type ''read file'') on how to read data from a file. Our applications engineering department does not write custom solutions for our customers. 

Regards,

[jfxcoll]

I assume your company wrote the peak pick function correct? and the thresholds function ?. Given that you sell this product as a visual programing tool how is it that the peak handling VI (chart handling functions) does not include  FWHM ? Something as rudimentary to chart function as  volume under a curve under a peak? If your company was on it they would have written the VI for a chart recorder inetiator long ago and I submitt to you they have . Given all the other VI you havbe wrten for O'scopes and other pieces of you equipment that use this kind of algorythem you have already writen it.
This type if integrtaor is ubiquitous come on release the VI
http://www.chem.agilent.com/Library/usermanuals/Public/G1213-90120.pdf

[Dennis_Knutson]

It's unclear what VI you want released. If there is a new function that you want released, the proper place for requesting it, is in the Idea Exchange. If you want a new instrument driver, you can do so at http://www.ni.com/downloads/instrument-drivers/

Note that driver creation is based on demand. Note also that the creation of a driver for an instrument with the built-in measurement you want has absolutely nothing to do with the implementation of the same algorithm in LabVIEW.

[jfxcoll]

NI should release the VI's that do the work that makes chart recording valuable. NI has already written the algorithms. Functions like FWHM for a given peak and the volume under a peak are rudimentary. So here I sit huge investment in National Instruments product and I am having to do the coding  they promised I would avoid. 
What use would a driver for a piece of equipment that is no longer made What is needed by myself is an emulator VI of the 3396. They wrote the Peak pick VI without out the functionally.
I could have gotten Agilent vee
http://www.keysight.com/en/pd-1476554-pn-W4000D-1TP/vee-pro-932?nid=-32809.806312.00&cc=US&lc=eng&cm...

[jfxcoll]

     Given the description in the VI function ane refrence manual of their analysis functions you would think that the volume under a peak would be part of the PP VI I mean really.

[natasftw]

You think bumping a several year old thread will make someone write code for you?  Interesting.