Quikscat L3 HDF reader

code to read multiple QuikSCAT L3 data in extension *. hdf

% SYNTAX: STRUCT_MATRIX=hdfreader_quikscat();
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% This code reads as many files as you want (1 or >1) of your
% choice from dataset PODAAC JPL QuikSCAT Seawinds L3 passings, generating a struct-organized maxtrix.
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% $$ FILES IN '*.gz' MUST BE EXTRACTED.
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% $$ IS NOT NECESSARY TO RENAME THE EXTRACTED FILES.
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% $$ On days when some point of the grid sample was not recovered its value, is placed NaN. (believe me, this will greatly facilitate the analysis).
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% This code is based on PC Windows Platform, tested in Windows Seven Ultimate Edition (64-bit) on Matlab 64-bit version 7.8.0 (2009a) and same version of Windows 32-bit.