function varargout = savejd(varargin)

if (nargin < 1)

error('you must provide file name');

opt = struct;

if (nargin > 2)

if (nargin == 3 && ischar(varargin{3}))

filename = varargin{3};

else

opt = varargin2struct(varargin{3:end});

filename = jsonopt('filename', '.json', opt);

end

if (~exist('filename', 'var'))

filename = '.json';

if (regexpi(filename, '\.json$|\.jnii$|\.jdt$|\.jdat$|\.jmsh$|\.jnirs$|\.jbids$'))

[varargout{1:nargout}] = savejson(varargin{:});

elseif (regexpi(filename, '\.bjd$|\.bnii$|\.jdb$|\.jbat$|\.bmsh$|\.bnirs$|\.pmat'))

[varargout{1:nargout}] = savebj(varargin{:});

elseif (regexpi(filename, '\.ubj$'))

[varargout{1:nargout}] = saveubjson(varargin{:});

elseif (regexpi(filename, '\.yaml$'))

[varargout{1:nargout}] = saveyaml(varargin{:});

elseif (regexpi(filename, '\.msgpack$'))

[varargout{1:nargout}] = savemsgpack(varargin{:});

elseif (regexpi(filename, '\.h5$|\.hdf5$|\.snirf$'))

if (~exist('saveh5', 'file'))

error('you must first install EasyH5 from https://github.com/NeuroJSON/easyh5/');

end

if (~isfield(opt, 'rootname'))

if (nargin >= 3 && ischar(varargin{1}))

opt.rootname = varargin{1};

else

opt.rootname = inputname(2);

end

end

[varargout{1:nargout}] = saveh5(varargin{2}, filename, opt);

error('file suffix must be one of .json,.jnii,.jdt,.jmsh,.jnirs,.jbids,.bjd,.bnii,.jdb,.bmsh,.bnirs,.ubj,.yaml,.msgpack,.h5,.hdf5,.snirf,.pmat');