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  • Home
  • Documentation
  • FAQ
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  • Current Release Notes
  • Ferret Users Guide
    • Users Guide Index
    • Commands Reference
    • 1. Introduction
    • 2. Data Set Basics
    • 3. Variables & Expressions
    • 4. Grids & Regions
    • 5. Animations & Gif Images
    • 6. Customizing Plots
    • 7. Handling String Data Symbols
    • 8. Working with Special Data Sets
    • 9. Computing Environment
    • 10. Converting to NetCDF
    • 11. Writing External Functions
    • Glossary
    • Appendix A: Functions
    • Appendix B: PPLUS Guide
    • Appendix C: Ferret-Specific PPLUS Enhancements
  • Previous Release Notes
  • Tutorials and Demos
    • Ferret Tour
    • DSG files: Discrete Sampling Geometries Demo
    • Ferret sorting demo
    • Fast Fourier Transforms demo
    • Empirical Orthogonal Functions demo
    • Ferret objective analysis demo
    • Ferret Palette Demo
    • Map projections
    • Ferret polygon vector demo
    • Ferret Graticules demo
    • Ferret Polytube Demo
    • Ferret Polymark Demo
    • Ferret Constant-Array demo
    • Ferret land_detail demo
    • COADS Tour
    • Levitus Tour
    • Use OPeNDAP
    • Ferret binary read demo
  • PyFerret
    • PyFerret Downloads and Install ../../faq/ferret-faqs.html
    • What is PyFerret?
    • Why use PyFerret?
    • PyFerret for the Ferret user
    • PyFerret command syntax: quick-start notes
    • PyFerret for the Python user
    • Graphics in PyFerret ?
    • New Ferret functionality
    • PyFerret Python functions and constants
    • PyFerret Python objects and methods
    • Ferret external functions in Python
    • Ferret Fortran external functions
    • PyFerret metadata-and-data dictionaries
  • OPeNDAP
    • OPeNDAP usage in Ferret
    • Use OPeNDAP Demo
    • Test OPeNDAP

1. Introduction

  • 1.1 OVERVIEW
    • Ferret User's Group
    • Ferret Home Page
  • 1.2 GETTING STARTED
    • Concepts
      • Thinking like a Ferret:
    • Unix command line switches
    • Sample sessions
      • Accessing a netCDF data set
      • Reading an ASCII data file
      • Using viewports
      • Using abstract variables
      • Using transformations
      • Using algebraic expressions
      • Finding the 20-degree isotherm
  • 1.3 COMMON COMMANDS
  • 1.4 COMMAND SYNTAX
  • 1.5 GO FILES
    • Demonstration files
    • GO tools
    • Writing GO tools
      • Documenting GO tools
      • Preserving the Ferret state in GO tools
      • Silent GO tools
      • Arguments to GO tools
      • Documentation and checking arguments to GO tools
      • Flow Control in GO tools
      • Debugging GO tools
  • 1.6 SAMPLE DATA SETS
  • 1.7 UNIX TOOLS
  • 1.8 HELP
    • Examples and demonstrations
    • Help from within Ferret
    • Web-based information