SpecView engine that has fast Levenberg – Marquett routine for profile spectra fitting
With that procedure you can fit constants as well as model parameters.
This is the best way to determine the temperature of the spectrum and relative weights of a-, b- or c- type transitions based on laws of statistics and mathematics!!!
Option 1, in our experience, is more robust routine, Number of steps has different meaning - it's how many times Levenberq - Marquett routine is run, sometimes it's useful to make it a big number (100 or 200) since the routine can wonder in a shallow valley quite far from the global minimum.
Deviation Depth or Percentage are also of different meaning then in the other Profile Fit 1 program. It is now used for the purpose of calculation of derrivatives. Set it to some number from expected constant range (~5%) when far from the minimum to 0.01% for the final "polishing".
To choose parameters to fit, go to Menu Fit->LM Profile Fit->Mark Parameters, which invokes parameters dialog box, just double click and check the ones you want to be affected by the fit. Try not to use Fast Calculations option if you want to fit parameters (because with that option the intensities of the lines are not recalculated correctly).
Well, I have to notice this is the most capable version of SpecView, though the slowest. If you do not use Profile Fitting procedure –
use other versions.
If you have MS Visual Studio 6.0 installed on your computer, download this smaller SpecViewLMshared.exe file that links dynamically to MS DLL shared libraries,
or otherwise
Check out the newest and fastest version of LM Profile Fit SpecView(not as good for complicated surfaces as engines from above, but much faster)!
Download SpecViewLMfast.exe now
--To use upgrades from this page you have to have the original package SpecVi38a.exe installed for proper files configuration.--
You are very welcome to leave comments or express feelings you experienced using SpecView. Your feedback is important for development of the best spectrum analysis tools.
Last revised on December 31, 1969, 7:00 pm