XonGrid Files

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     XonGrid Release Notes
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2014-01-19 (svn checkout -r 100 http://svn.code.sf.net/p/xongrid/code/ xongrid-code)
 - XonGrid 4
 - Use THROW_XLW and static strings to send error messages
 - XonGrid / VB interface: interp_nd and interp_2d_tab functions 
 - Doc update

2013-12-10 (svn checkout -r 75 http://svn.code.sf.net/p/xongrid/code/ xongrid-code)
 - XonGrid 3
 - Gaussian Process Regression
 - Support for missing values and errors
 - 2D Natural Neighbor Interpolation - http://code.google.com/p/nn-c/
 - 2D Cubic Spline Approximation - http://code.google.com/p/csa-c/
 - User defined interpolation method
 - Easier code compilation: XLW code has been included in XonGrid 3 

2013-09-23
 - XonGrid 2b
 - Improved Akima interpolation
 - New packaging script
 - INSTALL-XLL.xls update

2013-07-12
 - XonGrid 2
 - Bilinear interpolation for interp2dTab
 - Akima 1D interpolation
 - Web site and help update, main page french translation
 - INSTALL-XLL.xls update
 - Error messages update

2013-06-30
 - v1.2b
 - Fix typo in help and SubKriging parameter description in cppinterface.h

2013-06-27
 - v1.2
 - New Interp2dTab formula for data from table (tabulated data)
 - Web site and help update
 - Minor code optimizations
 - Fix typo in two error messages

2013-06-20
 - v1.0
 - Fully compatible with previous versions
 - Fix multithreaded calculation speed issue
 - New faster linear matrix solver (Lapacke dsysvx)
 - Many code optimizations
 - Add sub Kriging based on distance
 - Better management of invalid range of parameters
 - More explicit error messages
 - Reliable INSTALL.xls add-in loader
 - Web site update

2013-06-05
 - v0.6b
 - Delete the unreliable INSTALL.xls add-in loader from archive
 - web site update

2013-06-04
 - v0.6
 - One single archive for Excel 32 bits and 64 bits versions
 - New Kriging interpolation method with subset based on a specified 
   number of closest points. This allow to perform Kriging interpolation
   on data set larger than 1024 points
 - Fix memory leak when Kriging was applied on large data set
 - New INSTALL.xls add-in loader to help install and/or update
 - New .chm help file: now the blue link Help on this function works!
 - Few C code optimizations for speed

2013-05-13
 - v0.4 build for Excel 64 bits
 - Web site update

2010-03-30
 - v0.4: minor changes and 1 bug fix
 - Fix output issue with interpNd
 - Return an error message if Method = -1 with nbDim > 1
 - Clarify one error message
 - Web site update

2010-03-12
 - v0.3: almost 80% of the code have been rewritten to implement array
   formula but the v0.3 should be 100% compatible with the previous version
 - Array formula
 - Test if malloc fail to prevent Excel Crash
 - Limit to nbPoints to 1024 for Kriging (to prevent solver roundoff errors)
 - Error management improvements
 - Web site update
 - Improve Examples files

2010-02-19
 - XonGrid-xll-v0.2:
 - first release, not fully tested yet