createFile.m
aac9db1ea696TekRSA-Freq-vs-Time

createFile.m
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			% Function creates file, if necessary together with subdirectory, and shows
			% a dialog if the file with such name already exisits
			function file_created=createFile(fullfilename,varargin)
			p=inputParser();
			addRequired(p,'fullfilename',@ischar);
			addParameter(p,'overwrite',false,@islogical);
			parse(p,fullfilename,varargin{:});

			file_created=true;

			%Creates save directory if it does not exist
			[save_dir,~,~]=fileparts(fullfilename);
			if ~exist(save_dir,'dir')
			mkdir(save_dir)
			end

			if exist(fullfilename,'file') && ~p.Results.overwrite
			finfo=dir(fullfilename);
			if finfo.bytes~=0
			% File is not empty. Ask user what to do next.
			resp = yesnodlg( ...
			'File already exists. Would you like to overwrite?',...
			'File already exists', false);
			if resp
			fprintf('Overwriting file at %s\n',fullfilename);
			else
			warning('No file written as %s already exists',...
			fullfilename);
			file_created=false;
			return
			end
			end
			end
			%Creates an empty file
			fileID=fopen(fullfilename,'w');
			fclose(fileID);

			%MATLAB returns -1 for the fileID if the file could not be
			%opened
			if fileID==-1
			errordlg(sprintf('File %s could not be created.',...
			fullfilename),'File error');
			file_created=false;
			return
			end
			end