IDL, or Interactive Data Language, is a computer programming language primarily used for data analysis and data visualization. While it first appeared in This web site is about learning to program with IDL – Interactive Data Language. Numeric/graphics: IDL, Matlab, Octave Traditional programming languages: IDL. What is IDL? Interactive Data Language. Proprietary software distributed by .

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The NaN is excluded from the visualization generated by the plot command. List of numerical analysis software Comparison of numerical analysis software. Not to be confused with Interface description language.

IDL Programming

Views Read Edit View history. Articles needing additional references from February All articles needing additional references Articles that may contain original research from September All articles that may contain original research Articles containing potentially dated statements from All articles containing potentially dated statements Articles lrograming may contain original research from August Articles containing potentially dated statements from February This section possibly contains original research.

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It is popular in particular areas of science, such as astronomyatmospheric physics and medical imaging. The first version of ENVIan application for remote sensing multispectral and hyperspectral image analysis written in IDL, was released in Hence part of the art of using IDL or any other array programming language, for that matter for numerically heavy computations is to make use of the built-in vector operations.

SOL was an array-oriented language with some primitive graphics capabilities.

IDL shares a common syntax with PV-Wave and originated from the same codebasethough the languages have subsequently diverged in detail. The single namespace prgoraming particularly problematic; for example, language updates that include new built-in functions have on occasion invalidated large scientific libraries. February Learn how and when to remove this template message.


Coyote’s Guide to IDL Programming

Statements consisting only of original research should be removed. This example contains a divide by zero; IDL will report an arithmetic overflowand store a NaN value in the corresponding element of the y array the first onebut the other array elements will be finite. Note that the operation in the second line applies in a vectorized manner to the whole element array created in programig first line, analogous to the way general-purpose array programming languages such as APLJ or K would do it.

Effective 31 Octoberas a result of restructuring, that company became Exelis Visual Information Solutions. IDL has been applied widely in space science, for example in solar physics.

September Ivl how and when to remove this template message. IDL is vectorizednumericaland interactive, and is commonly used for interactive processing of large amounts of data including image processing.

IDL (programming language)

August Learn how and when to remove this template message. Retrieved 30 September Arrays are passed by reference, and this mechanism is an advertised feature of the language to pass data back out of a subroutine — in contrast, array slices are copied before being passed, so that data modifications do not flow back into array ranges after the subroutine exitsviolating the principle of least surprise. New object and pointer types, and limited object-oriented programming capabilities, were added to IDL in Retrieved from ” https: The syntax includes many constructs from Fortran and some from C.

It accepted two-letter codes that specified an arithmetic operation, the input registers to serve as operands, and the destination register.

Many historical irregularities survive from the early heritage of the language, requiring individual workarounds by the programmer.


Unsourced material may be challenged and programint. Inastronauts on board a Space Shuttle used IDL loaded on a laptop to study ultraviolet radiation. In this release, the graphics supported by IDL were primarily Tektronix terminals and raster graphics displays. The findgen function in the above example returns a one-dimensional array of floating point numbers, with values equal to a series of integers starting at 0.

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Introduction to IDL Programming

Image processing software Array programming languages Earth sciences graphics software Numerical programming languages Plotting software. As with most other array programming languages, IDL is very fast at doing vector operations sometimes as progaming as a well-coded custom loop in Fortran or C but quite slow if elements need processing individually.

Some of these features, which make IDL very simple to use interactively, also cause difficulties when building large programs. At LASP, David Stern was involved in efforts to allow scientists to test hypotheses without employing iidl to write or modify individual applications.

Widgets were added to IDL inproviding event-driven programming with graphical user interfaces.

From Wikipedia, the free encyclopedia. By using this site, you agree to the Terms of Use and Privacy Policy. The first program in the evolutionary chain to IDL that Stern developed was named Rufus; it was a simple vector-oriented calculator that ran on the PDP It took advantage of the VAX virtual memory and bit address space.