BUFFER, / CURRENT, / DEVICE, DIMENSIONS=, LAYOUT= array, LOCATION=, MARGIN= scalar or, / NO_TOOLBAR, / NODATA, / OVERPLOT, / WIDGETS Keywords are applied only during the initial creation of the graphic. See Surface and contour examples and Model the Study Area and Setting for additional examples using the CONTOUR function. m = MAP( 'Robinson') ct = COLORTABLE( 72, /reverse) c = CONTOUR(s, x, y, $ /FILL, $ OVERPLOT=m, $ GRID_UNITS= 'degrees', $ RGB_TABLE=ct, $ TITLE= 'Global Surface Wind Speeds') mc = MAPCONTINENTS() cb = COLORBAR(TITLE= 'Speed ($m s^$)') Additional Examples Display contours of wind speed and a colorbar. conversion = IDLUNIT( '1 mile / hour') / IDLUNIT( 'meter / second') s *= conversion.quantity Set up a map projection. Convert them to meters per second with IDLUNIT. s = SQRT(u^ 2 + v^ 2) The wind speeds are given in miles per hour. file = FILE_WHICH( 'globalwinds.dat') RESTORE, file, /VERBOSE Calculate wind speed from the component vectors. The following lines of code create the graphic shown. In this case IDL will automatically generate the independent X and Y values and use your equation to compute the dependent Z data. Instead of data, you can also input an equation of X and Y using either the input argument or the EQUATION property. iTools give you many types of displays with a single command.The CONTOUR function draws a two-dimensional contour plot for a 2D array of data. This object-oriented programming system has an assortment of premade tools that help you produce graphic representations of 2-D and 3-D plots (line, scatter, polar, and histogram), surface representations, contour maps, image displays, and volume visualizations. Version 6.0 of IDL introduces “intelligent tools” called iTools (not to be confused with Apple’s defunct iTools). The application uses a C-like programming language that offers hundreds of special functions for different kinds of data display you might call IDL “Adobe Photoshop for scientists.” For example, if you have seismic data to chart, you can elect to display it in as many as 20 global projections, using the program’s variety of built-in color tables. IDL stands for Interactive Data Language, a name that doesn’t really explain much. Version 6.0’s new iTools feature makes complex plotting easier for beginners, while the new, free IDL Virtual Machine lets nonusers customize display features.

Idl contour