json=savejson(rootname,obj,opt)
convert a MATLAB object (cell, struct or array) into a JSON (JavaScript Object Notation) string
authors:Qianqian Fang (fangq<at> nmr.mgh.harvard.edu) date: 2011/09/09
input: rootname: name of the root-object, if set to '', will use variable name obj: a MATLAB object (array, cell, cell array, struct, struct array) opt: a struct for additional options, use [] if all use default opt can have the following fields (first in [.|.] is the default) opt.FloatFormat ['%.10g'|string]: format to show each numeric element of a 1D/2D array; opt.ArrayIndent [1|0]: if 1, output explicit data array with precedent indentation; if 0, no indentation opt.ArrayToStruct[0|1]: when set to 0, savejson outputs 1D/2D array in JSON array format; if sets to 1, an array will be shown as a struct with fields "_ArrayType_", "_ArraySize_" and "_ArrayData_"; for sparse arrays, the non-zero elements will be saved to _ArrayData_ field in triplet-format i.e. (ix,iy,val) and "_ArrayIsSparse_" will be added with a value of 1; for a complex array, the _ArrayData_ array will include two columns (4 for sparse) to record the real and imaginary parts, and also "_ArrayIsComplex_":1 is added. opt.ParseLogical [0|1]: if this is set to 1, logical array elem will use true/false rather than 1/0.
output: json: a string in the JSON format (see http://json.org)
examples: a=struct('node',[1 9 10; 2 1 1.2], 'elem',[9 1;1 2;2 3],... 'face',[9 01 2; 1 2 3; NaN,Inf,-Inf], 'author','FangQ'); savejson('mesh',a) savejson('',a,struct('ArrayIndent',0,'FloatFormat','\t%.5g'))
license: BSD or GPL version 3, see LICENSE_{BSD,GPLv3}.txt files for details
-- this function is part of jsonlab toolbox (http://iso2mesh.sf.net/cgi-bin/index.cgi?jsonlab)