io >> Input from and output to external formats
File Operations
  append_save
  fexist
  rfsearch
Miscellaneous Conversion Functions
  fromJSON
  pch2mat
  read_namelist
  toJSON
  utf82unicode
  unicode2utf8
  write_namelist
CSV File Functions
  cell2csv
  csv2cell
  csvconcat
  csvexplode
DBF I/O
  dbfread
  dbfwrite
XML I/O
  getxmlattv
  getxmlnode
  tidyxml
  xmlread
  xmlwrite
Spreadsheet I/O User Functions For .xls/.xlsx
  oct2xls
  xls2oct
  xlsclose
  xlsfinfo
  xlsopen
  xlsread
  xlswrite
Spreadsheet I/O USer Functions For .ods
  oct2ods
  ods2oct
  odsclose
  odsfinfo
  odsopen
  odsread
  odswrite
Spreadsheet Utility Functions
  calccelladdress
  chk_spreadsheet_support
  parsecell
Spreadsheet Function Testing
  io_testscript
  test_spsh

