Multi-peak

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Fri, 11/04/2011 - 06:02 am

Hello,
I would like to know if its possible to add a function to the multipeak fitting package.
Thanks in advance,
Gabriel
I would also like to create a command to save the fitting coefficients and load them again if its necessary.
Thanks

November 4, 2011 at 08:22 am - Permalink

The Multi-peak Fit 2 package does make it possible to add a peak shape or a baseline function. It isn't as easy as I wish it were, but it is possible. The help file for the package describes it:

DisplayHelpTopic "Adding Your Own Peak Function"
DisplayHelpTopic "Adding Your Own Baseline Function"

With the latest version of Multi-peak Fit 2, you can re-visit a previous set by selecting it from the Start panel. So far, I haven't added the ability to load peaks form another set as the initial guess.

John Weeks
WaveMetrics, Inc.
support@wavemetrics.com

November 4, 2011 at 10:20 am - Permalink

How can I acess the multi-peak fit 2 package? Do I need the lastest version of Igor?
How can I fit 2D data? Can I create my fitting functions?

November 7, 2011 at 11:06 am - Permalink

gzvitiello wrote:
How can I acess the multi-peak fit 2 package?

If you have Igor 6.21 or later, pull down the Analysis menu and select Packages->Multipeak Fitting->Multipeak Fitting 2.
Quote:
Do I need the lastest version of Igor?

Nearly- you need 6.21 or later. We are shipping 6.22a, and that is a free update.
Quote:
How can I fit 2D data?

Multipeak Fit does not support multivariate fitting. If you wish to do a series of 1D fits to all the columns or rows of a matrix, it is possible with some effort to do it using functions that are part of the Multipeak Fit package. Igor itself supports multivariate fitting with little effort.
Quote:
Can I create my fitting functions?

Yes. For regular fitting, it is quite easy. For Multipeak fitting, it is harder.

John Weeks
WaveMetrics, Inc.
support@wavemetrics.com

November 8, 2011 at 12:41 pm - Permalink