We first check to see if code has not been specified (if(n_elements(code) eq 0 )), in which case we set this variable to a default value (-1). If Variable[Range] and Array are the same size, elements of Array specified by Range are inserted in Variable. Social IntelliEarth Solutions Geospatial Products Custom Services IntelliEarth Marketplace Industries Defense & Intelligence Environmental Monitoring Academic Learn Videos Blogs Events & Webinars Training Case Studies Whitepapers Resources Support Forums Help Articles i.e. have a peek at this web-site
You can also of course print a value returned from a function such as: ENVI> print, indgen(nb) Look carefully at the error message you were given: % Attempt to subscript OUTDATA BowmanLimited preview - 2006Common terms and phrases24-bit color arguments array syntax automatically binary file Bowman Building IDL Applications BYTE calculations chapter coefficients COLOR_24 Commands and Keywords COMPILE_OPT IDL2 Set CONTOUR coordinate How do we test for this here? Product IDL Version 8.5.1 See also:Monitoring Variable ValuesAssignment Operations and ArraysSaving Variables from an IDL SessionEnvironment VariablesSystem Variables Table of Contents What's New Routines (by topic) 3D Visualization Animation Array
Write the envi header file for the output image ENVI_SETUP_HEAD, fname=outimage, ns=ns, nl=nl, nb=nb, data_type=data_type, offset=0, interleave=0, xstart=0, ystart=0, descrip=descrip, bnames=bnames, sensor_type=sensor_type, wavelength_units=wavelength_units, /write Here, we specify the output image name BowmanAcademic Press, 2006 - Computers - 286 pages 0 Reviewshttps://books.google.com/books/about/An_Introduction_to_Programming_with_IDL.html?id=wNWHUS69DrcCIn today's information age, scientists and engineers must quickly and efficiently analyze extremely large sets of data. See Use Vector and Array Operations for details. There is somewhat of an 'art' to tracking down bugs in code, particularly code you did not write yourself in a language you don't know very well, but the basic principles
ANSWER: Well, it is hard to say if it is "right" or not. arrOne = [1, 2, 3, 4, 5] arrOne[[2, 4]] = 0 PRINT, arrOne 12040 Note: Note the use of the double brackets. you subtract 42949672.0 from 42949673.0, get zero, and are surprised. It is illegal if Variable[Range] and Array are different sizes.
Open the envi file ENVI_OPEN_FILE, inimage, R_FID=FID, NO_REALIZE=1 This opens the file inimage and associates with it a file identifier (FID), set to FID here. Illegal Subscript Range For more help see http://daringfireball.net/projects/markdown/syntaxComment Available categories Announcements (3) Fortran (2) General (1) IDL (2) interesting (1) MacBook (2) Python (1) R stuff (30) Most used tagsbeamer bubble-sort cdo coord_polar course Web Coyote's Guide to IDL Programming [Return to IDL Programming Tips] Copyright © 2009 David W. https://groups.google.com/d/topic/comp.lang.idl-pvwave/A8KikYLESEk You can save the file at any point, but remember to recompile before you re-run it.
indata[5,10] refers to sample 6, line 11). IDL> indices = [2, 5, 9] IDL> Print, array[indices] 2 5 9 All as expected. Markdown is turned off in code blocks: [This is not a link](http://example.com) To create not a block, but an inline code span, use backticks: Here is some inline `code`. Of course, you will have to set the compiler option in each of the IDL program modules where you wish to have this functionality.
Note A subscript structure can also be composed of a range of elements. http://www.astro.ufl.edu/~warner/IDL5220/week5.html Next, ifmsg has been specified, we print this out. Out Of Range Subscript Encountered Idl arrOne = [1, 2, 3, 4, 5] arrOne = 9 PRINT, arrOne 12945 Variable[ScalarSubscripts] = ArrayExpression Expression array is inserted in Variable array beginning at point indicated by subscript. Idl For Loop See Clipping for details.
IDL> Print, array % Attempt to subscript ARRAY with
See the help page for ENVI_FILE_QUERY for more details. F. It is a long-time feature of IDL, although not well-known by even the most experienced IDL users.
For information on when you should not use subscript ranges, see Avoid Using Range Subscripts. If expression is scalar, it is inserted into the subarray. Read, highlight, and take notes, across web, tablet, and phone.Go to Google Play Now »An Introduction to Programming with IDL: Interactive Data LanguageKenneth P. Open the output file openw, lun, outimage, /get_lun We can use the standard idl procedure openw to open the output image file (the file containing the data, not the header file
The output header file will have a '.hdr' suffix. you multiply two 8-bit integer numbers together & are then surprised that the result doesnt always fit in 8-bits); related to this .... arrOne = [1, 2, 3, 4, 5] arrOne[[0, 2]] = [111,333] PRINT, arrOne 111233345 Note: Elements of the subscript array that are negative, or greater than the highest subscript of the Version of IDL used to prepare this article: IDL 7.1.
IDL> array = Indgen(10) If I want to print certain of the array elements, I can specify the indices as a vector, like this. If you try to do it faster, you'll make more mistakes; learn from the mistakes you make; think about these 'common' issues: uninitialised variables (you multiply your answer by a factor If you wish to always generate errors when out-of-bound subscripts are used, you can set the strictarrsubs compiler option, like this. IDL's high-level language and powerful graphics capabilities allow users to write more flexible programs much faster than is possible with other programming languages.
the function call uses american spelling & you have assumed english, or you simply mis-type). Required fields are marked * Name * E-mail * Website To create code blocks or other preformatted text, indent by four spaces: This will be displayed in a monospaced font. As another example, assigning any non-zero value to a boolean array will give the value true (1). Type the following text into the editor: ;; write a separate procedure for the error message; to make it clearer;pro PRINTERROR, code, msg; pass an error code through or set to
Compile the code: Run->Compile spectralVariance.pro Identify a line in the code you want to stop at, put the cursor at the begining of this line, and select: Run->Set Breakpoint Run the Let's pass some out of range indices as vectors: IDL> print, spam[[1000,5000,7000], [1000,2000,4000]] 23.000000 23.000000 23.000000 12 IDL> print, spam[[1000,5000,7000], [1000,2000,4000]] 23.000000 23.000000 23.000000 In stead of throwing an exception, IDL
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