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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
I am currently working on a general-purpose IOSP for Matlab files, based upon the JMatIO package (http://sourceforge.net/projects/jmatio/) which can handle Matlab file version 5 files rather well. With some modifications JMatIO can handle Matlab file version 4 as well. Currently, the approach for mapping between Matlab and the CDM is: Represent all 1xN char arrays as global attributes Represent other 1x1 arrays as global attributes Represent all other Matlab arrays as ucar.ma2.Array. Most numerical types map directly, except: UINT8 maps to SHORT UINT16 maps to INT UINT32 maps to LONG UINT64 maps to LONG (may cause overflow). Matlab Structures map to ucar.nc2.Structure Matlab Cell arrays are handled in one of three ways: - If all the data is the same type, it is represented as a regular ucar.ma2.Array. - If all the data is identical within each column of the array, it is represented as a ucar.nc2.Structure with a member corresponding to each column named "[name]_[col#]". - Otherwise the cell array is represented as a ucar.nc2.Structure, where each cell is named "[name]_[row#]_[col#]" for MxN cell arrays, "[name]_[row#]" for Mx1 cell arrays, or "[name]_[col#]" for 1xN cell arrays. Open questions: Is anyone else interested in a general purpose Matlab IOSP? Does my approach make sense? How to represent imaginary components of arrays? Perhaps represent as a 2nd matrix with a prefix like "_i_" or a suffix such as "_imag"? Is there a better way to name the members of Structures that result from handling Matlab Cell arrays? This will need ongoing effort. Is there a "best" place to host IOSP development projects (SourceForge, Google Code, etc?) Thanks , Mike _____________________________________________ Michael A. Godin Software Engineer Monterey Bay Aquarium Research Institute Phone: 831-775-2063 http://www.mbari.org <http://www.mbari.org>
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