On line 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 (based on Ferret V3)

Ferret Tour- html version
tutorial.jnl- script file

Remote data access with OPeNDAP (protocol formerly known as DODS: Distributed Oceanographic Data System)

dods_demo - html version
dods_demo.jnl - script file
dods_winds_demo

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
Writing Vis5D-formatted data file ef_wv5d_demo

Binary stream file capability

binary read demo - html version
binary read demo.jnl - script file

Constant array syntax

constant_array_demo - html version
constant_array_demo.jnl - script file

COADS ocean-atmosphere data set

COADS tour- html version
coads_demo.jnl- script file

Levitus data set: Climatological Atlas of the World Ocean

Levitus tour- html version
levitus_demo.jnl- script file

Color palettesmap colors to the range of data values by percent, level, or value

palette_demo- html version
palette_demo.jnl

Map projections and map projection utility scripts

mp_demo- html version
mp_demo.jnl

Track plotting

trackplot_demo- html version
trackplot_demo.jnl

Polymark demo: plot points using symbols colored by values of a variable

polymark_demo- html version
polymark_demo.jnl

Polytube demo: plot a colored tube of variable values along a plotted track

polytube_demo- html version
polytube_demo.jnl

Continuous colorbar: using the ccbar.jnl script to make continuous colorbars

ccbar_demo- html version
ccbar_demo.jnl

Color-filled vectors: using the poly_vectors and mp_poly_vectors scripts.
These set up to issue POLYGON commands to draw filled vector arrows.

poly_vec_demo- html version
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- html version
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- html version
land_detail_demo.jnl
Here is the data file geo_borders_intermed.nc

The demos below are journal scripts only.
Run these from Ferret with "GO coads_demo", 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.jnl
Polar stereographic map projections polar_demo.jnl
South polar stereographic map projections polar_south_demo.jnl

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
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

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

US Department of Commerce NOAA OAR PMEL Contacts Privacy Policy Disclaimer Web Usage Statistics