Idl Error Attempt To Subscript Out Of Range
Mind you that by IDL I mean the Interactive Data Language, and not the Interface Description Language, which many more people know. the function call uses american spelling & you have assumed english, or you simply mis-type). This sets up an array with 5 elements called dims that contains the image dimensions. I just encountered one of those, which I would like to share. http://upintheaether.com/out-of/idl-error-out-of-range-subscript-encountered.php
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. arrOne = [1, 2, 3, 4, 5] arrOne[[2, 4]] = 0 PRINT, arrOne 12040 Note - Note the use of the double brackets. For example, arrOne[[-1, 2]] = [111,333]
has the same result as arrOne[[0,2]]. arrOne = [1, 2, 3, 4, 5] arrTwo = [11, 12] arrOne = ArrTwo PRINT, arrOne 1111245 Note - An "out of range subscript" error will occur if you attempt to this content
Out Of Range Subscript Encountered Idl
Tagged with: IDL programming, idl-quirk, IDL7.0 Posted in IDL Leave a Reply Cancel reply Your email address will not be published. Table 15-2: Introduction to Subscript Expression Structures Table 15-2: Introduction to Subscript Expression Structures Syntax Structure Description Variable[ScalarSubscripts] = ScalarExpression Expression is stored in a single element of Variable. The data are read into the array indata which will usually be stored in samples:lines order (i.e.
This associates a logical unit number (lun) with the file, and creates the file on disk. So, we can run the procedure with different values for WS by e.g.: ENVI> ip = '/data/rsu_raid_0/plewis/public_html/teaching/unix/idl/' + 'site2' ENVI> op = '/data/rsu_raid_0/plewis/public_html/teaching/unix/idl/' + 'site2max15' ENVI> localmaximum, ip,op,WS=15 Maximum: varying window This procedure is much the same as the above, but it (is supposed to) return a single band of information which is the variance over all wavebands. Note that we check to see if FID has been set to -1, which indicates an error.
All of these (and more) options are available in idlde through control buttons. Illegal Subscript Range In other words, the following code does generate an error. IDL> indices = [2, 5, 9] IDL> Print, array[indices] 2 5 9 All as expected. https://groups.google.com/d/topic/comp.lang.idl-pvwave/A8KikYLESEk ANSWER: Well, it is hard to say if it is "right" or not.
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). For example arrOne = ArrTwo fails. We will need this extra information when we come to write the output image. Note Array operations are much more efficient than loops.
Illegal Subscript Range
Variable[ArraySubscripts] = ArrayExpression Elements of Expression are stored in designated elements of Variable. 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. Out Of Range Subscript Encountered Idl One of the best tools to accomplish this is Interactive Data Language (IDL®), a programming and visualization environment that facilitates numerical modeling, data analysis, and image...https://books.google.com/books/about/An_Introduction_to_Programming_with_IDL.html?id=wNWHUS69DrcC&utm_source=gb-gplus-shareAn Introduction to Programming with IDLMy Idl For Loop 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
If expression is scalar, it is inserted into the subarray. IDL> Compile_Opt strictarrsubs IDL> indices = [2, 5, 99] IDL> Print, array[indices] % Array used to subscript array contains out of range subscript: ARRAY. 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. indata[5,10] refers to sample 6, line 11).
IDL> indices = [2, 5, 99] IDL> Print, array[indices] 2 5 9 In fact, any out-of-bounds index is truncated to the nearest valid index. 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 inimage and outimage. The result of running: ENVI> spectralVariance , '/data/rsu_raid_0/plewis/public_html/teaching/unix/idl/site2', '/data/rsu_raid_0/plewis/public_html/teaching/unix/idl/site2.spectralvar' should be something like: Result of running spectralVariance The program should compile ok, but when you run it, you will get an
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 It can have up to two arguments: (i) code and (ii) msg. 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
You can now examine the value of any variables, to check they are as you expected.
arrOne = [1, 2, 3, 4, 5] arrOne[[2, 4]] = 0 PRINT, arrOne 12040 Note: Note the use of the double brackets. It is illegal if Variable[Range] and Array are different sizes. You have to plan, write & document code carefully. IDL> Print, array % Attempt to subscript ARRAY with
Required Skills IDL Organization External Definitions Interpreting Logical Boolean Values Compilation and Linking Details Recommended Reading Using SPAWN and Pipes Using CALL_EXTERNAL The CALL_EXTERNAL Function Passing Parameters Using Auto Glue Basic Also, a compiler will not generally trap all of the issues raised above: indeed, the example code you were given compiled fine. 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. The setting of NO_REALIZE=1 is optional, but just means that the image won't automatically be loaded into the 'available bands list' of envi.
You can test out the operation of this with, e.g.: ENVI> printerror, 0, 'hello world' % localMaximum: Error 0 % hello world % Syntax - LOCALMAXIMUM(inimage,outimage,[WS=3]) 2.3.2 Opening and reading an as the file contains two procedures. Load the file spectralVariance.pro: File->Open... Here, we check to see if the keyword has been set, and set WS to 3 if it hasn't, using the function keyword_set(): if keyword_set(WS) ne 1 then WS=3 Thus, the
Where possible, use libraries of code that have been developed and tested rigorously, rather than attempting to implement everything yourself from scratch (unless you want to do it as a learning Other array elements are unchanged. If Variable[Range] and Array are the same size, elements of Array specified by Range are inserted in Variable. It is still very worthwhile learning how to use a debugger to track down problems, so play around with it to find and fix the bugs in the program spectralVariance.pro.
which is a local maximum operation in this case. For example, assigning the value 257 to a byte array will result in the value 1. 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 See the help page for ENVI_FILE_QUERY for more details.
A (correct) working version is given made available to you (spectralVARIANCE.pro) but don't look at this until you have had a good go yourself.