idl programming

From: http://blog.sina.com.cn/s/blog_764b1e9d0100r4du.html From: http://hi.baidu.com/dengshubin/item/25c793b1f03832d085dd79e4 From: http://hi.baidu.com/dyqwrp/item/bcfbbadc6cbbe9dc251f40b4 A scatter chart shows the changing trend of the dependent variable with the independent variable. It is useful in data trend analysis or correlation analysis. 1.Draw a scatter chart under ENVI 1)Two-dimensional scatter chart Click the Tools-2D scatter plot in the image Window menu, and select the two-dimensio

Most of the time, when writing components, we will package and use the original components, and the interfaces and types in the encapsulated components are cumbersome. It takes too much time to redefine these interfaces and types. It is not worthwhile for us to implement simple functions. Therefore, we can reuse the interfaces and types in the original components. The procedure is as follows: 1 Include "*. IDL" in

I have been using the wtl development interface, but I have never added IDL to wtl and implemented idispatch. I just encountered this problem. I am confused for an afternoon and finally want to understand it. My requirements are:1. an EXE implements a dialog box with a webbrowser embedded for webpage access;2. Call the interface method in webbrowser on the webpage. For example, if you click the "close" button on the webpage, You need to respond to the

1. Read the file into the data variable. Run the command to check whether the variable contains the data variable. File = dialog_pickfile (Path = 'e: \ trainning2013 \ chapter05 \ data ')Openr, Lun, file,/getFname = bytarr (12)Readu, Lun, fnamePrint, fnamePrint, string (fname)Point_lun, Lun, 14_ 1N = 0Readu, Lun, _ 1NPrint, _ 1NReadu, Lun, _ 2nPrint, _ 2nPoint_lun, Lun, 58Year = 0Readu, Lun, yearPrint, yearPoint_lun, Lun, 1201*2Data = bytarr (1,,1201)Readu, Lun, DataTV, data [*, *, 0]TV, congri

Folder delimiter, Windows is "/", Linux is "\", according to the program, need to modify Run the *.pro file through bash, seemingly can only run without parameters, parameters need to write to the file IDL files cannot be in uppercase, there are procedures or function names If the *.pro run when garbled, but not when consulted, you can create a new file, copy the contents of the past, re-compile, then it will not garbled "189"

Sinsonglew Source: Http://www.cnblogs.com/sinsonglew Welcome reprint, Please also keep this statement. Thanks:)1. Principle of Regional growth algorithmReference: wiki entry area growth algorithm;From seed point seed, traverse the 4 neighborhood of the seed, and if a neighborhood pixel conforms to the threshold setting, it is scaled as a growth point and inserted into the seed queue as a new growth seed, and the old seed is removed until the seeded column is empty, and the pixel space (a picture

A Brief introduction:1.ActiveQt contains Qaxcontainer and qaxserver components.1) Qaxcontainer allows COM objects to be used, and ActiveX controls can be embedded in the QT program.Qaxcontainer is made up of three classes. respectively:Qaxobject Encapsulation of COM objectsQaxwidget Encapsulation of ActiveX controlsQaxbase is the parent class of Qaxobject and Qaxwidget, which implements the core function of encapsulating com.You can get and set the properties of an ActiveX control by calling the

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There is ways to get the actual size (byte) of the IDL variables. 1. Use built-in size function FUNCTION sizeof, DataItem;; First get the information regarding the item;Info = SIZE (DataItem);; Deduce type and number of elements;Type = info (info (0) +1)Nitems = info (info (0) +2)Size = 0;; Calculate number of bytes depending on item type;Case Type of1:size = 1 * nitems2:size = 2 * nitems3:size = 4 * nitems4:size = 4 * nitems5:size = 8 * nitems6:size

-weight:bold" > legacyparent= parentclass allows setting the base class for the G enerated binding. Otherwise, the base class would is set to Domobject or the explicitly specified the parent class in the interface definition. Nostatictables sharing a single static prototype table only works when a class was guaranteed to being accessed from a single heap, be Cause the lookup code expects the key (attribute name) to has the same address acros

; +;:D Escription:; Describe the procedure.; Author:dyq 2009-7-19;;; -pro TEST_READHDF compile_opt idl2 file = File_dirname (Routine_filepath (' TEST_READHDF ')) + $ ' \data\mod04_l2. A2004196.0140.005.2007023163311.HDF '; ISHDF = HDF_ISHDF (file) IF ishdf EQ 0 then RETURN; ; Call IDL's own function to obtain information of current HDF data; Hdf_info,file; If we need to do a geo-corrective operation, we need to obtain the original data, and the latitude data grid, data acquisition two way

When this (draw a polygon besides IDL on the map) occurs, the points for the Polygon on the East Side (I. e. USA) are captured with coordinates As far as the issue itself, I have not found a solution for it. AsMatter of fact, it appears that it may be a known bug that some peopleAre working towards a fix for. Here is an old Forum Thread about whatAppears to be the same issue: http://lists.osgeo.org/pipermail/openlayers-dev/2010-August/006360.html (so

At present, all of them have been completed, and very good results have been achieved. Short Code for using this RPC: The Return Value of the RPC function is rpc_ret_t, mainly to avoid writing special code for the void return value function. //////////////////////////////////////// /// // // Async_client.cpp // Async_server.cpp The main idea is to use a macro to generate a function declaration and factory code on the server side, register the class to the factory, and then start the serve

As shown in the following figure, for the Hants Harmonic analysis of the single pixels of the vegetation growth season curve, now using a one-element six-time polynomial to fit the curve, and to solve the phenological parameters (beginning and end), in MATLAB programming implementation: Code: Year0=zeros (38998,1); For i=1:1:38998 if M (i,:) ==0 continue; End Corrcoficent=polyfit (x,m (i,:), 6); N=[corrcoficent (1), Corrc