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1 Replies and 861 Views
IDL 8.8 not compatible with 8.6 code 861 1
Started by Deleted User
Hi, in IDL 8.6.1 list({a:&91;1&93;}) eq list({a:&91;'1'&93;}) returns 1. In IDL 8.8.1 the same returns 0. This breaks my code that determines whether two structures are equal (as IDL cannot say {a:1} eq {a:1}). This (among other issues - see topic 'Fatal error with restored structure from sav file') definitely prevents me and my working group from updating IDL beyond 8.6. Will this be changed eventually to assure backward compatibility Thanks a lot! Achim
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861 |
by Ben Castellani 24 Aug 2022 07:03 AM |
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3 Replies and 981 Views
Need Optiminization help! 981 3
Started by Deleted User
I've been working at this dilemma for quite a while and thought I would ask my fellow IDL experts. I am processing an image by taking sequential 3x3 2D subsets from it and calculating the following: 1) Subtracting the center point from the surrounding elements, 2) Calculating the absolute value of (1), and then summing all of those deltas. The problem is I can't figure out how to efficiently do this with IDL without loops. Here is some code: n = statboxsize - 2 temp = INTARR(statboxsize, ...
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981 |
by Ben Castellani10 Aug 2022 01:44 PM |
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3 Replies and 1542 Views
.RUN not working w/o options in idl 8.8.2 1542 3
Started by Deleted User
Using .RUN in idl 8.8.2 does not give me a '-' prompt, just goes right back to IDL> . However if I do '.RUN --' then I get the '-' prompt. I do not see this issue with IDL 8.8.1 . Any ideas on how to setup 8.8.2 so I don't need to add '--' to use .RUN . Same happens to .RNEW . Thanks Chris
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1542 |
by Ben Castellani10 Aug 2022 08:57 AM |
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2 Replies and 2110 Views
How to download IDL Virtual Machine 2110 2
Started by Deleted User
Hello, I need the IDL VM to run a .sav file that has been given to me. I have completed the registration process, but I don't understand how to download IDL. If I go to download and licensing center, it says that I need to enter a specific username and password (not the same one used to register on the main website), but there is no link to create such account. I have tried to download old versions, but it says that the page is temporarily unavailable. It's very disappointing that l3harri...
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by MariM28 Jul 2022 08:06 AM |
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2 Replies and 1205 Views
Fatal error with restored structure from sav file 1205 2
Started by Deleted User
Hi, I use list(struct) eq list(struct) to compare structures. This works fine mostly but the code below produces a fatal error (IDL Workbench closes). Note that this only happens when the structure is set up in a certain way, e.g., with only the first two tags, it does work. s = {l: 1l, s: '', s2: ''} list(s) eq list(s) ; This returns 1 as expected save, s, FILENAME='s.sav' restore, 's.sav' list(s) eq list(s) ; this produces a fatal error I use IDL 8.8.1 on Linux Mint 20.3 Thanks...
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1205 |
by Ben Castellani01 Jul 2022 08:16 AM |
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2 Replies and 1156 Views
static variables in class object 1156 2
Started by Deleted User
Hello everybody, i am very new at idl programming but know the principles of OOP. Now i need a class with a few instances where each instance is able to access the same data. I know the concept of static member variables in c classes and thought, there would be an equivalent in idl. But i didn't found any. Is there another concept i could use Thanks, carl
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1156 |
by Deleted User21 Jun 2022 05:28 AM |
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0 Replies and 1525 Views
UTF-16 Support in IDL 1525 0
Started by Deleted User
In IDL 8.1 version, default encoding for workspace and resource file UTF-8. If we need to support surrogate pair (in Chinese environment), we need UTF-16 encoding. In UTF-8 encoding surrogate pair character is displayed as ''. But we could not change to UTF-16 encoding. If we change to UTF-16 encoding in IDL workspace file entries got messed up or IDL got crashed. Also even if we input surrogate pair character in widget_text control, GET_VALUE returns '' Please give support for UTF-...
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1525 |
29 May 2022 12:31 AM |
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1 Replies and 1094 Views
HDF5 Question 1094 1
Started by Deleted User
Does IDL have support for 'dimension scales' in its H5 routines I see it in various Python, Fortran, and C implementations. But I cannot see anything similar in IDL's H5 routines. For example, the calls to H5DS at this thread: https://hdfeos.org/forums/showthread.phpp=1774 . Thanks for any input. -Marcos
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1094 |
by Ben Castellani25 May 2022 01:09 PM |
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0 Replies and 1408 Views
lamda's as elements of a dictionaries 1408 0
Started by Deleted User
This code simplifies the situation: compile_opt strictarr ec=hash() ec =dictionary('l', lambda('x:x^2') ) a={a:lambda('x:x^2')} scr=ec&91;'l'&93; scr1=a.a print, scr(1), scr1(1) What is the syntax for accessing the lambda expression without the dummy variables scr and scr1. For example ec.l(1), (ec.l)(1), ((ec.1))(1) all return 'undefined method for dictionary' or 'syntax errors.'
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1408 |
01 Apr 2022 04:20 PM |
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1 Replies and 1048 Views
Spectral Match 1048 1
Started by Deleted User
Hello, How can I match spectra with IDL like for example with Spectral Analyst Tool in ENVI Thanks, Nathan
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1048 |
by Ben Castellani30 Mar 2022 09:39 AM |
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1 Replies and 1297 Views
QUERY_DICOM return zero for dicom files 1297 1
Started by Deleted User
I have some dicom files not being recognized as dicom by IDL, but recognized by other dicom readers/viewers. One example is from the newest softwareupdate for an x-ray vendor export raw images in a dicom format where QUERY_DICOM return zero. The file can be read by other software including MicroDicom and ImageJ so the vender claim that there is nothing wrong with the dicom files. Another example: Some processed images, both for old and new gamma camera, return zero on QUERY_DICOM. The files can ...
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1297 |
by Ben Castellani14 Mar 2022 05:08 PM |
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0 Replies and 7294 Views
How to determine which US state a point is located in? 7294 0
Started by Ben Castellani
There is no routine built into IDL to do this by default. However, it is very simple using the stock states shapefile and the IDLanROI object class: https://www.l3harrisgeospatial.com/docs/idlanroi.html See the provided example function below which can be used to identify the state containing the specified point: function stateFinder, longitude, latitude ; NAME: ; stateFinder ; ; PURPOSE: ; This function returns the name of the US state containing the specified point....
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7294 |
14 Mar 2022 11:00 AM |
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1 Replies and 1463 Views
Plot transparency issue IDL8.8.2 1463 1
Started by Deleted User
Hi IDL experts, When I plot symbols with the plot or scatterplot function, the transparency of the symbols is high. I cannot get it to zero, and appears to be transparency=50 by default. I can increase it to values higher than transparency=50. However, the issue only occurs when displaying within IDL and not when I save it to e.g. a png-file. I'd like to see my figures exactly as I would save them, so I'd know what I'm saving. How can I fix this I'm using IDL8.8.2 on Linux Debian 11 Tha...
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1463 |
by Ben Castellani03 Mar 2022 10:21 AM |
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1 Replies and 1095 Views
Skip images with no pixels 1095 1
Started by Deleted User
I diced some images and then want to extract spectra the spectra from the dices. Because of how I diced the images, there are now dices that have no pixel information. Instead of manually removing those, I want the foreach loop to skip the ones with no pixels. When running this code: 1 foreach file, files do begin 2 raster1 = e.OpenRaster(file) 3 ;Define ROI with Threshold 4 roi = ENVIROI() 5 roi.AddThreshold, raster1, 182, min_value=0, max_value=1 6 7 pixelData = raste...
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1095 |
by Deleted User21 Feb 2022 10:18 PM |
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6 Replies and 2589 Views
IDl bug 2589 6
Started by Deleted User
I use IDL 8.8, and I recently upgraded my OS to Big Sur. After that I notice that, when I press return on the keyboard to go to the next line, the line below disappears. This happens because the process of creating a new blank line by pressing the return key takes a very long time. After a new line is created, the delated line appears again. I also noticed that if I move the IDL window, the new line appears right away. This is a very annoying problem, how can I solve it
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by Deleted User17 Feb 2022 09:54 AM |
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0 Replies and 1457 Views
calling IDL system routines from DLM 1457 0
Started by Deleted User
I would dearly love to be able to access the NetCDF routines in the NCDF DLM from my own C code packaged in my own DLM. This is a specific case of the more general problem of needing to access IDL system routines from within a user-written DLM. Is there an interface for this One option is to use IDL_ExecuteStr(), but this appears to be discouraged in the IDL documentation (and is really inefficient). I had thought that defining an external function in my DLM code as follows: extern IDL_V...
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1457 |
24 Jan 2022 09:55 AM |
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2 Replies and 2657 Views
IDL VM splash screen question 2657 2
Started by Deleted User
Question:
The IDL Virtual Machine (IDL VM) displays a splash screen when running a .SAV. We are trying to run this .SAV from another application through a command line shell execute, and it causes the splash screen to appear. Is there an easy way we can suppress this splash screen
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by Deleted User10 Dec 2021 05:20 AM |
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0 Replies and 1741 Views
IDL bug: reading an ENVI file created by Python 1741 0
Started by Deleted User
I have created several classification maps by Python coding and saved them as envi files. I want to assess the classification map and produce confusion matrices. Since I already have an IDL code using ENVI functions for classification assessments, I tried to open the ENVI files in IDL using envi_open_file but it sends r_fid=-1 and can not open them. The files can be directly opened by ENVI and there is no problem. When I have saved the file in ENVI, (using 'save as') as a standard envi file...
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1741 |
30 Nov 2021 07:45 AM |
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5 Replies and 2176 Views
Issues Running Code on IDL 8.8 2176 5
Started by Deleted User
I recently downloaded IDL to run some particle tracking scripts and I am having issues running them on IDL 8.8. I can run the scripts on IDL 7.1 without any issues but on 8.8 I see the following code. Any advice on how to solve this and run my this scripts hash((rrimask) mod bignum) = 0 ^ Syntax error. At: /Applications/harris/idl88/lib/IDL kit/kit3d/feature3d.pro, Line 199 if nw gt 0 then hash((rrimask(w) mod bignum)) = 0 ^ Syntax error. At: /A...
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by Ben Castellani19 Nov 2021 11:43 AM |
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0 Replies and 1669 Views
MORPH_DISTANCE 1669 0
Started by Deleted User
The 1D calculation in MORPH_DISTANCE seems off, in that it automatically sets the borders to background, even if not told to. For example: print, Morph_Distance(&91;1,1,1,0,0,0&93;) returns 0 1 1 0 0 0 when the two reasonable answers would seem to be 1 2 1 0 0 0 or 3 2 1 0 0 0 depending on how the edge is treated. But, the second number should be 2 either way. The documentation says 'I...
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12 Nov 2021 01:02 PM |