mclose - close an opened file
mclose must be used to close a file opened by mopen . If fd is omitted mclose closes the last opend file.
mclose('all') closes all files opened by file('open',..) or mopen
meof , mfprintf , fprintfMat , mfscanf , fscanfMat , mget , mgetstr , mopen , mprintf , mput , mputstr , mscanf , mseek , mtell , file , mdelete ,