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6 Replies and 1208 Views
idl-band math expression with a variable 1208 6
Started by Deleted User
Hi,
It's my first time in a forum, i hope we can help each other.
Well, I'm trying to calculate the WDVI index but I can't put the slope soil into the expression of math_doit, it doesn't recononise, it said that my variable is undefined. Also, I tested using with making a function of the index, but it doesn't work. So, my question is How can i put this variable in the band math expression.. in this case "ss". The first expr is NDVI and the second is the WDVI.
Here is a pa...
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6 |
1208 |
05 Nov 2010 02:16 PM |
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2 Replies and 1146 Views
New Barplot tickmark bug 1146 2
Started by Deleted User
I found a barplot tickmark bug that could be easily reproduced.
Here's my situation. I have two sets of values, and I made a custom tickmark (xticks). If I plot only 1 bar, the tickmarks will display correctly. But when I overplot a second bar, it will mess up the tickmarks. I tried several overplot options (e.g. overplot = b1, /current, etc.), none of them seem to fix the issue. This bug seems to be related to barplot because when I overplot a line over the barplot, it also mess up th...
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2 |
1146 |
04 Nov 2010 04:28 PM |
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1 Replies and 1079 Views
matlab equivalent 1079 1
Started by Deleted User
in matlab to Execute operating system command and return result, I
can use sysem:
system('command')
&91status, result&93 = system('command')
&91status,result&93 = system('command','*-echo*')
what is the equivalent command in IDL
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1 |
1079 |
28 Oct 2010 03:47 PM |
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2 Replies and 1164 Views
IDL 8.0.1 now available 1164 2
Started by Deleted User
A patch release, IDL 8.0.1, is now available. This is a planned release to follow up the major changes that were introduced in IDL 8. It contains over 100 bug fixes plus 5 new features:
Arrow function
MAPGRID BOX_AXES property
Multiple IDL graphics can now be saved to a single PDF file
New graphics and object graphics now allow for thicknesses
WRITE_PNG now allows the horizontal or vertical resolution to be specified
NOTE: IDL 8.0.1 is an overlay inst...
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2 |
1164 |
28 Oct 2010 03:40 PM |
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4 Replies and 943 Views
Scroll bars missing/disappear on Windows platform 943 4
Started by Deleted User
Problem: I have a widget application that I developed on my Unix/Mac system and displays the necessary scroll bars just fine unless I run it on a Windows system in which case the scroll bars don't appear at all.
Supporting Info: On my Unix/Mac, the scroll bars are automatically adjusted according to the size of the top level widget base which changes to facilitate the changing contents of the lists inside of it, accomplished by including the scroll keyword when the top widget_base is cr...
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4 |
943 |
27 Oct 2010 11:49 AM |
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1 Replies and 991 Views
how to get the parameters set by system 991 1
Started by Deleted User
While using 'plot' command, and leave these parameters like 'xrange', 'xticks' blank, IDL will automatically set these parameters for you. I want to know how to get these parameters.
For example:
pro test
a=&911,2,3,4,5&93 & plot,a
end
The xrange of the figure will be set to &910,4&93, how I get the value of xrange and use it in the routine later like this:
pro test
a=&911,2,3,4,5&93 & plot,a
print,xrange
end
Thanks a lot
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1 |
991 |
26 Oct 2010 10:52 AM |
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1 Replies and 1182 Views
importare immagine da un file 1182 1
Started by Deleted User
Salve a tutti , potreste dirmi come fare per visualizzare con IDL un immagine quali istruzioni occorrono non riesco proprio a farlo! :-(
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1 |
1182 |
25 Oct 2010 02:23 AM |
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0 Replies and 960 Views
keyboard event for widget table 960 0
Started by Deleted User
Hello everybody,
I would like to introduce in my widget_table the copy and paste functionnalities.
Is there a way to track the keyboard events for a widget_table As far as I have read only the widget_draw has the possibility to grab keyboard events.
thank you very much
Eric
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0 |
960 |
21 Oct 2010 08:44 AM |
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1 Replies and 965 Views
IDL 8.0 garbage collector issue 965 1
Started by Deleted User
I have found something that doesn't seem quite right to me with regards to the IDL 8.0 garbage collector.
If you have a function that returns a pointer array and you try to tuck that call into another function call (n_elements for instance) the pointer gets freed before the second function call completes. Here is an example program that I wrote to show my problem...
function createPointerArray
compile_opt idl2, logical_predicate
data = ptrarr(3)
da...
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1 |
965 |
20 Oct 2010 10:28 AM |
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1 Replies and 985 Views
Error opening *.sav 985 1
Started by Deleted User
Hello, when i want to open files *.sav download of IDL user's application, always i have error ENVI_SELECT, and i can't open any files, Someone say me about this big problem
I have IDL 7.0
Thanks
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1 |
985 |
19 Oct 2010 12:29 PM |
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2 Replies and 1328 Views
Taylor diagram 1328 2
Started by Deleted User
Hi !
has anyone already designed a Taylor diagram in IDL
This kind of plot is like a (r, theta) plot, but with theta replaced with a correlation coefficient (whatever) and with a non-linear theta axis.
See an example here : http://www.ipsl.jussieu.fr/~jmesce/Taylor_diagram/taylor_diagram_definition.html
Thanks,
Patrick_UQAM
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2 |
1328 |
19 Oct 2010 05:58 AM |
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0 Replies and 1054 Views
CCD camera to IDL 1054 0
Started by Deleted User
Good morning to everyone,
I would like to know if anyone knows how to send commands to an external CCD camera. I have no problem in communicating to the USB port as if it was a serial port, but after that I'm stocked without knowing what to do.
Any suggestions
Thanks a lot!
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0 |
1054 |
12 Oct 2010 09:48 AM |
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2 Replies and 991 Views
Some suggestions to the ITT forum! 991 2
Started by Deleted User
Why the fourm is so lonely As the only official forum for ENVI and IDL, I think there should be a idea place for beginers to study and exchange. In fact it is presented a problem, often a couple of weeks have no response.
First of all, I think this fourm should be revised, make it more friendly for people.
Second, it's very important to employ some responsible experts to answer general questions for beginners, so as to enhance the popularity and visibility, which will both benefit for...
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2 |
991 |
07 Oct 2010 10:00 PM |
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2 Replies and 1229 Views
ENVI_GET_ROI_INFORMATION, about the parameter of NL and NS 1229 2
Started by Deleted User
Hi, everybody, I want to retrive the NL and NS of ROI, the following is the description information of ENVI_GET_ROI_INFORMATION function that got from ENVI help.
ENVI_GET_ROI_INFORMATION, ROI_IDS &91, /LONG_NAME&93 &91, NL=variable&93 &91, NPTS=variable&93 &91, NS=variable&93 &91, ROI_COLORS=variable&93 &91, ROI_NAMES=variable&93 &91, /SHORT_NAME &93
NL (optional) Use this keyword to specify a named variable containing the number of lines associated with the desired RO...
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2 |
1229 |
06 Oct 2010 07:56 PM |
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0 Replies and 971 Views
Widget_Info - /Table_select limited ??? 971 0
Started by Deleted User
Hi,
I've been working for few month now on the GUI where I have some Tables.
in One Procedure, I call : lig_sel=widget_info(w_table_0,/TABLE_SELECT)
The result is not complete, and event If i have selected 100 rows, "lig_sel" will return only 22 or 20.
Does somebody has ever encounter the same problem
Thanks
Vincent
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0 |
971 |
06 Oct 2010 07:25 AM |
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1 Replies and 967 Views
ENVI_STATS_DOIT 967 1
Started by Deleted User
Hi,
i am using ENVI_STATS_DOIT to calculate the mean for some satellite images but i noticed IDL is taking into account zero values that are used to define NaN pixels. does anyone know if there is an 'ignore zero values' function in IDL statistics or another such work around
Many thanks,
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1 |
967 |
05 Oct 2010 07:38 AM |
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0 Replies and 1408 Views
READ_CSV 1408 0
Started by Deleted User
it's great to have the read_csv function. I read a CSV file that has a field (column) in it somewhere (not always in the same place) that I'm looking for. I specify header= in the function call and I get the array of field/column names that are in the CSV file. (as in point_list = read_csv(my_csv, header_point_fields) ) I can search that header_point_fields to find the position of the field I'm looking for. Example: I'm looking for the field/column named "POINT_ID". I search the heade...
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0 |
1408 |
01 Oct 2010 07:44 PM |
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4 Replies and 1487 Views
IDL 8.0 - Contour Labels upside down 1487 4
Started by Deleted User
I'm having a heck of a time trying to get my contour labels right-side up. I am plotting atmospheric pressure data in time. i.e. I plot from 1000mb to 100mb on the y-axis. As a result, contour flips my contour labels upside down since the y-axis is in reverse. I've tried to set the baseline and updir keywords to reverse the lables, but I am having no sucess. Any ideas
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4 |
1487 |
30 Sep 2010 07:33 PM |
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3 Replies and 2454 Views
IDL 8.0 colorbar 2454 3
Started by Deleted User
I'm still getting used to the new Graphics, but there is one thing that is driving me crazy:
The COLORBAR function needs a "target" Graphics object to figure out which color palette to use. However, although IMAGE and CONTOUR functions have min_value and max_value paramters that you can use to change the dynamic range of color scale in the "target" plot, these changes are not reflected in the colorbar.....it still shows the actual min and max ranges of the original dat...
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3 |
2454 |
30 Sep 2010 03:01 PM |
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0 Replies and 1169 Views
test 1169 0
Started by Deleted User
test
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0 |
1169 |
30 Sep 2010 11:21 AM |