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More about IO (lifted from MATLAB's Help)
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Useful commands for command window and user input:
  
     clc        - Clear command window.
     more       - Control paged output in command window.
     diary      - Save text of MATLAB session.
     pause      - Wait for user response.
     echo       - Echo commands in M-files.
     keyboard   - Invoke keyboard from M-file.
     input      - Prompt for user input.
     disp       - Display array.
     format     - Set output format.
     home       - Send the cursor home.
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From $help iofun$:

  File import/export functions.
    dlmread     - Read delimited text file.
    dlmwrite    - Write delimited text file.
    load        - Load workspace from MATLAB (MAT) file.
    importdata  - Load workspace variables disk file.
    wk1read     - Read spreadsheet (WK1) file.
    wk1write    - Write spreadsheet (WK1) file.
    xlsread     - Read spreadsheet (XLS) file.
 
  Image file import/export.
    imfinfo     - Return information about graphics file.
    imread      - Read image from graphics file.
    imwrite     - Write image to graphics file.
 
  Audio file import/export.
    auread      - Read NeXT/SUN (AU) sound file.
    auwrite     - Write NeXT/SUN (AU) sound file.
    wavread     - Read Microsoft WAVE (WAV) sound file.
    wavwrite    - Write Microsoft WAVE (WAV) sound file.
 
  Video file import/export.
    aviread     - Read movie (AVI) file.
    aviinfo     - Return information about AVI file.
    avifile     - Create a new AVI file.
    movie2avi   - Create AVI movie from MATLAB movie.
 
  Formatted file I/O.
    fgetl       - Read line from file, discard newline character.
    fgets       - Read line from file, keep newline character.
    fprintf     - Write formatted data to file.
    fscanf      - Read formatted data from file.
    input       - Prompt for user input.
    textread    - Read formatted data from text file.

  String conversion.
    sprintf     - Write formatted data to string.
    sscanf      - Read string under format control.
    strread     - Read formatted data from text string.
 
  File opening and closing.
    fopen       - Open file.
    fclose      - Close file.
 
  Binary file I/O.
    fread       - Read binary data from file.
    fwrite      - Write binary data to file.
 
  File positioning.
    feof        - Test for end-of-file.
    ferror      - Inquire file error status.
    frewind     - Rewind file.
    fseek       - Set file position indicator.
    ftell       - Get file position indicator.
 
  File name handling
    fileparts   - Filename parts.
    filesep     - Directory separator for this platform.
    fullfile    - Build full filename from parts.
    matlabroot  - Root directory of MATLAB installation.
    mexext      - MEX filename extension for this platform.
    partialpath - Partial pathnames.
    pathsep     - Path separator for this platform.
    prefdir     - Preference directory name.
    tempdir     - Get temporary directory.
    tempname    - Get temporary file.
 
  HDF library interface help.
    hdf         - MEX-file interface to the HDF library.
    hdfan       - MATLAB Gateway to HDF multifile annotation interface.
    hdfdf24     - MATLAB Gateway to HDF raster image interface.
    hdfdfr8     - MATLAB Gateway to HDF 8-bit raster image interface.

  HDF library interface help.
    hdf         - MEX-file interface to the HDF library.
    hdfan       - MATLAB Gateway to HDF multifile annotation interface.
    hdfdf24     - MATLAB Gateway to HDF raster image interface.
    hdfdfr8     - MATLAB Gateway to HDF 8-bit raster image interface.
    hdfh        - MATLAB Gateway to HDF H interface.
    hdfhd       - MATLAB Gateway to HDF HD interface.
    hdfhe       - MATLAB Gateway to HDF HE interface.
    hdfml       - MATLAB-HDF gateway utilities.
    hdfsd       - MATLAB Gateway to HDF multifile scientific dataset interface.
    hdfv        - MATLAB Gateway to HDF V (Vgroup) interface.
    hdfvf       - MATLAB Gateway to HDF VF (Vdata) interface.
    hdfvh       - MATLAB Gateway to HDF VH (Vdata) interface.
    hdfvs       - MATLAB Gateway to HDF VS (Vdata) interface.
 
  HDF-EOS library interface help.
    hdfgd       - MATLAB Gateway to HDF-EOS grid interface.
    hdfpt       - MATLAB Gateway to HDF-EOS point interface.
    hdfsw       - MATLAB Gateway to HDF-EOS swath interface.
 
  Command window I/O
    clc         - Clear command window.
    disp        - Display array.
    home        - Send cursor home.
    input       - Prompt for user input. 
    pause       - Wait for user response.
 
  FIG file support for plotedit and printframes. 
    hgload      - Loads a Handle Graphics object from a file. 
    hgsave      - Saves an HG object heirarchy to a file. 
 
  Utilities.
    str2rng     - Convert spreadsheet range string to numeric array.
    wk1const    - WK1 record type definitions.
    wk1wrec     - Write a WK1 record header.
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