[MacPorts] #34755: Add non-linear peak fitting library to xmgrace

[MacPorts]

#34755: Add non-linear peak fitting library to xmgrace
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 Reporter:  feranick@…            |       Owner:  macports-tickets@…                   
     Type:  enhancement           |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  ports                 |     Version:  2.1.1                                
 Keywords:                        |        Port:  grace                                
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 Last year support for non-linear Lorentian, Gaussian peak fitting was
 added to the debian port of grace. The associated bug report for debian is
 here:

 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=578435

 Since then the patch has been stabilized and it made into the most stable
 build of grace in debian. Ubuntu has it has well in the default build of
 grace. It would be great to implement it also here in macports. The patch
 which I originally wrote is attached here. I tested it on a local build,
 applied directly to the port of grace in OS X with no issues.

 This is a rational for the patch:

 "One of the most used features in software for scientific data
 analysis is the ability to perform non linear peak fitting (specifically
 Lorentzian and Gaussian fits). Xmgrace sorely lacks this capability,
 unless you consider adding manually the required formula.

 The attached patch attempts to resolve this issue, by extending the
 non-linear panel with new menu entries (under a new "Library" menu
 entry) for:

 Gaussian (single, double, chromatography), Lorentzian (single
 double), Pseudo Voigt 1, Pseudo Voigt 2, Asymmetric double sigmoidal, Log
 Normal Function, Gram-Charlier A-Series, Edgeworth-Cramer Series, Inverse
 Polynomial Function.

 It also includes, Periodic Peak functions (Sine, Sine square, Sine
 damp), and Baseline Functions (Exponential Decay 1, Exponential Decay 2,
 Exponential Growth 1, Exponential Growth 2, Hyperbolic, Bradley, Logarithm
 3 parameters).

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Ticket URL: <https://trac.macports.org/ticket/34755>
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