jOceans: Oceanography-specific data and model analysis tools Conversions for Lagrangian trajectories latlon2uv - Converts latitude and longitude to horizontal velocity. uv2latlon - Integrates horizontal velocity to give latitude and longitude. Manipulating Lagrangian trajectories [see also jCell] trajextract - Extracts Lagrangian trajectory segments within given region. trajunwrap - Unwraps Lagrangian trajectories from a periodic domain. trajwrap - Wraps Lagrangian trajectories to fit within a periodic domain. trajchunk - Converts cell array data into chunks based on the Coriolis period. Idealized numerical model tools psi2fields - Velocity and other fields from the streamfunction. [with P.E. Isachsen] periodize - Returns a doubly periodic version of an input array. Eulerian eddy identification and analysis inellipse - Locates points on the interior of ellipses. closedcurves - Locate and interpolate closed curves in a possibly periodic domain. curvemoments - Centroid, area, and many other moments of a closed curve. divgeom - Geometric decomposition of eddy vorticity flux divergence. Plotting tools for mooring data hodograph - Generate hodograph plots (simple and fancy). provec - Generate progressive vector diagrams (simple and fancy). stickvect - Plots "stick vectors" for multicomponent velocity time series. Alongtrack altimetry tools trackextract - Extracts alongtrack altimetry segments within given region. NetCDF tools ncinterp - Interpolate field from NetCDF file onto specified positions. Topography tools and data jtopo.mat - One-sixth degree global topography, from Smith and Sandwell + IBCAO. topoplot - Plot regional or global topography at one-sixth degree resolution. See also jData.