Online and HTML demonstrations are available to familiarize you with Ferret's features.
The jnl files are "go scripts", available to you when you run Ferret, for example: "GO tutorial" shows you around Ferret.
Ferret tutorial
Ferret Tour
tutorial.jnl- script file
Remote data access with OPeNDAP
(OPeNDAP protocol formerly known as DODS: Distributed Oceanographic Data System)
opendap_demo
opendap_demo.jnl - script file
Working with Discrete Sampling Geometries (DSG) data
DSG Tutorial
dsg_point_plot.jnl- script file
dsg_prof_plot.jnl- script file
dsg_timeseries_plot.jnl- script file
dsg_traj_plot.jnl- script file
External functions examples
Sorting data ef_sort_demo
Fast Fourier Transforms ef_fft_demo
Empirical Orthogonal Functions (EOF's) ef_eof_demo
Gridding: interpolate point data to a grid objective_analysis_demo
Binary stream file capability
binary read demo -
binary read demo.jnl - script file
Constant array syntax
constant_array_demo
constant_array_demo.jnl - script file
COADS ocean-atmosphere data set
COADS tour
coads_demo.jnl- script file
Levitus data set: Climatological Atlas of the World Ocean
Levitus tour
levitus_demo.jnl- script file
Color palettes
map colors to the range of data values by percent, level, or value
palette_demo
palette_demo.jnl
Map projections
Map projections and map projection utility scripts
mp_demo
mp_demo.jnl
Track plotting
trackplot_demo.jnl
see Ribbon plot capabilities
Polymark demo:
plot points using symbols colored by values of a variable
polymark_demo
polymark_demo.jnl
Polytube demo:
plot a colored tube of variable values along a plotted track
polytube_demo
polytube_demo.jnl
Color-filled vectors:
using the poly_vectors and mp_poly_vectors scripts to draw filled vector arrows.
poly_vec_demo
poly_vec_demo.jnl
Graticule lines:
using the /GRATICULE, /HGRATICULE, and /VGRATICULE qualifiers to draw graticule lines (guide lines) at the tic marks of horizontal and vertical axes.
graticules_demo
graticules_demo.jnl
Detailed land outlines:
using the detailed data in the dataset geo_borders_intermed to draw continental, international land and marine boundaries, state boundaries, and rivers.
land_detail_demo
land_detail_demo.jnl
The demos below are journal scripts only.
Run these from Ferret with "GO coads_demo", etc.
View the documentation in the scripts with "go/help spirograph_demo.jnl", etc.
Data sets
COADS ocean-atmosphere data sets - - coads_demo.jnl
ETOPO (Equator to Poles) data set - - topographic_relief_demo.jnl
FNOC Navy surface marine wind data - - fnoc_demo.jnl
Levitus data set: Climatological Atlas of the World Ocean - - levitus_demo.jnl
Files and data manipulation
File reading ASCII FILES - - file_reading_demo.jnl
Editing data: "hand-editing" a variable - - edit_data_demo.jnl
Regridding data from one grid to another - - regridding_demo.jnl
Map projections
Map projections - - mp_demo.jnl
Mercator projection - - mercator_demo.jnl
Multi-variable data: plots available for data with multiple dependent axes - - multi_variable_demo.jnlPolar stereographic map projections - - polar_demo.jnl (out of date)South polar stereographic map projections - - polar_south_demo.jnl (out of date)
Math and Statistics
Mathematics: Computation and display of "abstract expressions" - - mathematics_demo.jnl
Statistics: sample distribution functions - - statistics_demo.jnl
Contouring and 2-D plots
Depth-to-density: contouring with a user-defined axis - - depth_to_density_demo.jnl
Custom contouring - - custom_contour_demo.jnl
Color palettes for color-fill plots - - palette_demo.jnl
Contnuous Colorbars - - ccbar_demo.jnl (ccbar.jnl is obsolete. It is replaced by /KEY=CONTINUOUS on color plot commands)
Topographic relief plotting; some of the ETOPO (Equator to Poles) data set - - topographic_relief_demo.jnl
Vector arrow plots - - vector_demo.jnl
Plot symbols, lines, patterns
Examples of line styles used by the PLOT command - - line_samples.jnl
Examples of pen color and thickness - - line thickness.jnl
Display the PLOT+| plotting symbols - - show_88_syms.jnl
Show all the patterns available for filled-contour plotting - - show_all_patterns.jnl
Track plotting
Polymark demo: plot points using symbols colored by values of a variable - - polymark_demo.jnl
Polytube demo: plot a colored tube of variable values along a plotted track - - polytube_demo.jnl
Track plot - - trackplot_demo.jnl
Other plot topics
Error bars on line plots error_bars, run - - error_bars_demo.jnl
Plots with multiple axis scales, run - - multi_variable_demo.jnl
Log plot - - log_plot_demo.jnl
Sigma coordinates - - sigma_coordinate_demo.jnl
Viewports: plotting several plots on a page - - viewports_demo.jnl
Wire frame plots to visualize 3-D data - - wire_frame_demo.jnl
... And just for fun
line plots - - spirograph_demo.jnl
pretty color pictures - - splash_demo.jnl