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2 Replies and 1063 Views
[urgent] help on binary data reading 1063 2
Started by Deleted User
Hi guys,
firstly, im very new with this language so im kinda lost.
well i'm actually trying to modify a software programmed in idl. This software converts unformatted binary file into ascii type format. Now, the problem is that when a number in the binary file is too long, it will combine with the previous number which results only one number in ascii file. This is very problematic because i've created another program that reads and processes the ascii file, and this problem will cause a d...
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2 |
1063 |
27 Apr 2011 02:32 AM |
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0 Replies and 1309 Views
create XYZ text file from floating array 1309 0
Started by Deleted User
(IDL6.3 - windowsXP)
I have a flloat array with dimensions 8100, 6805. Only about 300,000 of those points have values (others are all zero "nodata"). The data set is "georeferenced" (i.e. I know the lower left lat/lon and the degrees per pixel).
I want to be able to do two things:
1) Export this array as an XYZ text file for ONLY the non-zero values.
2) Ideally, I want the text file to have lat/lon, and not column-row (X-Y) locations for each va...
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0 |
1309 |
21 Apr 2011 10:51 AM |
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0 Replies and 1346 Views
Piper Diagram 1346 0
Started by Deleted User
Has anyone tried creating a Piper Diagram in IDL (http://en.wikipedia.org/wiki/File:Mtshabezi_chemistry.png)
Thanks,
John
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0 |
1346 |
18 Apr 2011 01:01 PM |
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0 Replies and 1176 Views
How to read multiple binary files? 1176 0
Started by Deleted User
Dear all,
I have multiple binary files in a folder. Now I want to read them with IDL and do some analysis. But how to read multiple files to an array variable Please give me some help.
Thanks.
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0 |
1176 |
17 Apr 2011 05:54 PM |
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1 Replies and 1829 Views
IDL 8.1 now available 1829 1
Started by Deleted User
IDL 8.1 is available for download from the ITT VIS website. Highlights include:
- Control of graphics events in the new graphics
- File support for KML/KMZ, GRIB and video output
- Updated high resolution map data
- Image processing and analysis routine enhancements
- Code management tools for the IDL workbench
IDL licenses that are current on software maintenance are entitled to this new release.
Bill Okubo, IDL Product Manager
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1 |
1829 |
14 Apr 2011 02:18 PM |
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0 Replies and 1285 Views
Elliptical cone 1285 0
Started by Deleted User
Hello forum, I would like to create right centered (not oblique) cone
that has an elliptical base.
I suppose that MESH_OBJ is the starting point but maybe some of you have
better ideas...
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0 |
1285 |
13 Apr 2011 02:23 AM |
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2 Replies and 800 Views
IDLnetURL function 800 2
Started by Deleted User
I want to use IDLnetURL function to download data from a remote ftp site.
However, I found that ziped files(*.Z) that downloaded have wrong file sizes and cannot be unziped.
Files in other format and downloaded from the same ftp don't have this problem.
Any idea what's going on Thanks!
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2 |
800 |
08 Apr 2011 02:36 PM |
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1 Replies and 1268 Views
How to create new matrix based on specific condition 1268 1
Started by Deleted User
Hi all,
I have ten images, I guess it also means 10 matrixes.
I want to apply a "IF" condition to those matrixes for each pixel. And finally I want to generate a new matrix which based on the 'IF' condition.
Specific, if the the pixel located at Row:5, Col:12 of original matrix_3(the third original matrix) match the "IF"condition. Then the value of Row_5 Col_12 of output matrix is 3.
I'm not sure whether I describe the problem clearly. Thanks for...
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1 |
1268 |
07 Apr 2011 06:28 PM |
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3 Replies and 1207 Views
IDL 8.0 Contour function 1207 3
Started by Deleted User
I am playing with the new contour function. I would like to generate a series of contour plots with fixed scales.
However, I could not find the argument that I can use to specify the exact levels I want. I have tried n_levels, min_value and max_value, c_value...None of them work.
Help!!
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3 |
1207 |
07 Apr 2011 02:19 PM |
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2 Replies and 1302 Views
Clearing list from WIDGET_LIST 1302 2
Started by Deleted User
How do I delete the content (the rows of strings) of a WIDGET_LIST
I tried using
WIDGET_CONTROL, ..., SET_VALUE=null
but nothing seems to happen
I'm unexperienced with IDL so any help would be appreciated.
Thanks, Stefan
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2 |
1302 |
06 Apr 2011 02:48 AM |
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1 Replies and 1395 Views
Accelerate Where() function 1395 1
Started by Deleted User
I have a long 2-column array and need to subgroup the data. Something like this:
a = dblarr(2,62500)
readdata(file,a)
for i=0,6250-1 do begin
b = lindgen(100)i*100 ; b may be random
for j=0,99 do begin
index = where(a&911,*&93 eq b&91i&93, count)
if (count ne 0) then sub = a&910,index&93
...
endfor
endfor
It is extremely slow for the indexing part. Is there a way to remove the inner for cycle but simply use where(a&911,*&9...
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1 |
1395 |
04 Apr 2011 09:54 AM |
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4 Replies and 1890 Views
Vectors in IF condition 1890 4
Started by Deleted User
Hello,
I have a simple line in my code:
IF A EQ B THEN C=2
Variables A and B are vectors (of equal length), so the operator "EQ" also returns a vector, which "IF" statement does not want to accept. This is the error I've got from IDL:
" Expression must be a scalar or 1 element array in this context: ."
Question: how it is possible to compare vectors and use the result as a condition in IF statement in IDL
Alexander
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4 |
1890 |
04 Apr 2011 05:53 AM |
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0 Replies and 1107 Views
How to determine a pixel whether within the ROI or not ? 1107 0
Started by Deleted User
When a image is subset by the ROI(blue line in the image), some pixels on the boundary was included. However, I want to keep the pixels that completely or a percentage threshold value such 90 of pixel area located within the ROI, which is not contaminated by the boundary objects such as the road. However, I found it difficult to get these pixel through IDL because no ENVI routines supported for this operation.
I am also try do this by a simple way. I am removed the pixels of the fir...
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0 |
1107 |
01 Apr 2011 09:16 PM |
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2 Replies and 998 Views
how to read date variable using idl 998 2
Started by Deleted User
anyone could help me out
now, I am wondering how to read the date variable such as "11:00/04/01/2011" in a Excell file, and how to plot it in coordinates system. Best wishes, Donald
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2 |
998 |
31 Mar 2011 08:21 PM |
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1 Replies and 2115 Views
Reading multiple HDF/NCDF files in IDL running under Fedora 13 2115 1
Started by Deleted User
I have been struggling with the following problem.
Ever since having a new operating system installed (Fedora 13, GNOME) I have problems with reading multiple HDF4/HDF5/HDF-EOS/NETCDF files in IDL (either 7.1 or 8.0). After reading a number of files - it depends on the amount of data that is being read - IDL simply stalls without error message and the only way out is to actually kill IDL. I encountered this first when running a script for reading one year of daily MOPITT data, which I ha...
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1 |
2115 |
30 Mar 2011 07:42 AM |
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1 Replies and 1346 Views
Using spawn command with variables 1346 1
Started by Deleted User
Hi,
I am interested in using the spawn command in IDL to search for a list of files and store them in a variable.
Something like:
spawn, &91'find /Volumes/folder1/*.lc'&93, sourcefiles
will store all of the file paths in an array sourcefiles, which I can access individually.
Is there a way to use the spawn command with a idl/unix variable storing the path, such as:
path='/Volumes/folder1/*.lc'
spawn, &91'find' path&93, sourcefiles.
I'm ...
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1 |
1346 |
29 Mar 2011 12:22 PM |
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0 Replies and 1048 Views
Object graphics for volumes 1048 0
Started by Deleted User
I've written a widget-based application that aligns two images relative to one another using a combination of user interaction and automatic registration based on mutual information. It uses object graphics (namely IDLgrImage) to allow the user to roughly align the images, then uses the transformation matrix from this as the initial values for the registration algorithm. I want to extend the functionality of the program to aligning 3D volumes.
Ideally, I'd display 2D slices from the volumes ...
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0 |
1048 |
27 Mar 2011 02:55 PM |
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2 Replies and 1357 Views
Changing to a new license server 1357 2
Started by Deleted User
We have a floating license serving several High Performance Compute clusters. We need to change to a new license server machine. ITT Vis very promptly re-hosted my license key, and I have the Flexlm and IDL_lmgrd daemons running on the new machine. So far, so good - but wait -
For each user on the compute cluster, IDL creates the file ~/.flexlmrc and uses it to stash the user's last known license definition. We laboriously diagnosed this the last time we had to migrate a license server ...
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2 |
1357 |
24 Mar 2011 04:24 PM |
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0 Replies and 1488 Views
Can idl create land sea mask 1488 0
Started by Deleted User
Hi,
I am a new idl user and I need to know
if I can create a land sea mask with idl.
it should be made by three column, latitude,longitude and 1(land) and 0(sea).
can i import a topographic map in idl and change it
thanks
claudia
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0 |
1488 |
23 Mar 2011 09:46 AM |
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2 Replies and 2896 Views
Array has too many elements error 2896 2
Started by Deleted User
Hello,
I have the following lines in my code for calculation of mean values in a ROI in a 3-colour image:
TV, I_disp, TRUE=1
ROI=CW_DEFROI(WG_Window_I, IMAGE_SIZE=&91500,500&93, OFFSET=&910,0&93)
ROI_X=ROI MOD 500
ROI_Y=ROI/500
M=mean(I_disp&912, ROI_X, ROI_Y&93)
When I select a large ROI (2500 points) in a 500x500 image with CW_DEFROI, IDL returns an "Array has too many elements" error in the last line "M=mean(I_disp&912, ROI_X, ROI_Y&93)"
I would...
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2 |
2896 |
22 Mar 2011 09:00 AM |