#+!

i = 1print,nistring(i,format='(I04)')IDL>0001

I would like to create a blank string of length 1024. (That is, my string contains 1024 spaces.) What is the best way to do this in IDL? The best way to do this is to simply use the ASCII char

Syntax of Format CodesThe syntax of an IDL format code is:[n]FC[+][-][width]Where:nis an optional repeat count (1 ≤ n) specifying the number of times the format code

There are two ways to get the actual size (byte) of the IDL variables.1.  Use built-in size functionFUNCTION sizeof, DataItem;; First get the information regarding the item;Info =

The SAVGOL function returns the coefficients of a Savitzky-Golay smoothing filter, which can then be applied using the CONVOL function. The Savitzky-Golay smoothing filter, also known as least squares

How to save a plot as the .ps file?cgPS_Open, 'output.ps'!x.thick = 4!y.thick = 4!z.thick = 4!p.thick = 4cgPS_Closeor if you want to save the plot to other format:cgPS_Close,

The VELOVECT procedure produces a two-dimensional velocity field plot. A directed arrow is drawn at each point showing the direction and magnitude of the field.This routine is written in the IDL l

cgboxplot.proGraphicsThis is graphics routine to display a box plot, also known as a box and whisker plot, in IDL direct graphics. Here are the IDL commands to read the data and pr

Creating an Array of StructuresThe easiest way to create an array of structures is to use the REPLICATE function. The first parameter to REPLICATE is a reference to the structure of each element

[XYZ]CHARSIZEAccepted by: AXIS Procedure, CONTOUR Procedure, PLOT Procedure, SHADE_SURF Procedure, SURFACE Procedure. System variable equivalents: ![XYZ].CHARSIZE.The size of the charact

IDL is old. Grandfatherly, even. When it was first written, you had a really souped-up computer if you had added an additional 10 MByte hard drive to go with the standard 1 MByte of disk space. So, yo

[XYZ]STYLEAccepted by: AXIS Procedure, CONTOUR Procedure, PLOT Procedure, SHADE_SURF Procedure, SURFACE Procedure. System variable equivalent: ![XYZ].STYLE.This keyword allows specification of axi

The problem is that an NAN is ... well, not a number. Thus, you can't use it in expressions that require a number. (Think of it as a mathematical Catch-22, if you like.)The proper way to write thi

There are six types of subscript ranges:Subscript FormatDescription[*]All elements of a dimension.This form is used with multidimensional arrays to se

The embedded symbols will be evaluated at run-time, so they will be correct both on the display and if you send this command to a PostScript file, or make a high-quality raster file with ImageMagick

idl -quiet

IDL borrow license errorHarris License AdministratorIDL 8.6.0, Nov 21 2016 (325531) (linux x86_64)Wed Nov 14 11:46:28 2018*** Unable to retrieve computer information.*** Is your license activate...

Can be also implemented directly with Butterworth.proQUESTION: I've heard about frequency domain filtering of images. How can I build image filters and do this in IDL?ANSWER: Filtering in the fr...

2D FUNCTION Centroid, array s = Size(array, /Dimensions) totalMass = Total(array) xcm = Total( Total(array, 2) * Indgen(s[0]) ) / totalMass ycm = Total( Total(array, 1) * Indgen(s[1])...

pro test   oMatlab = obj_new('IDLcomIDispatch$ProgID$Matlab_application_7.13')    ; or 9.5   ;use '..._6' instead if you use Matlab 6.x   ;oMatlab -> setProperty, visible=0   a = 4.8   oMatlab -&gt...

; Create an array:array = [1, 2, 1, 2, 3, 4, 5, 6, 6, 5]; Variable B holds an array containing the sorted, ; unique values in array:b = array[UNIQ(array, SORT(array))]PRINT, b

data = READ_ASCII('massatten.txt', template=mytemplate) myTemplate = ASCII_TEMPLATE('massatten.txt')

Just checked the file SIGMA_FILTER at the NASA site. I really must spend more time browsing these great sites.The code is similar, however it does not calculate the true variance under the mask. T

Note on Common Block Variable NamesVariables in IDL COMMON blocks do not actually have names. Rather, IDL represents COMMON blocks internally as an array of variables, and these variables are refe

The FILE_TEST function checks files for existence and other attributes without having to first open the file.ExamplesTo determine whether your IDL distribution supports the Intel-based Macin

The results are different when a multi-dimensional array is used:; Define a multi-dimensional array:A = FINDGEN(5,5); Sum each of the rows in A:SUMROWS = TOTAL(A, 1); Sum each of the columns in

Here is the solution for integers (represented as floating arrays, if you want to do floating point arithmetic, of course). The variable replacement_value represents whatever value you think is approp

Accepted by: CONTOUR Procedure, PLOT Procedure, SURFACE Procedure, System variable equivalent: !P.BACKGROUND.The background color index or 24-bit color value to which all pixels are set when era

A#B表示A的列乘以B的行A##B表示A的行乘以B的列

IDL> !PATH = Expand_Path('+~/idl/coyote') + ':' + !PATHNote the plus sign (+) at the front of the coyote directory name. This tells IDL to search all of the sub-directories of these directories a

Converting variables to string type often results in undesirable leading blanks. For example, the following command converts the integer 56 to string type:C = STRING(56)Entering the command:HE

ExamplesSee Additional Examples for more information on using TRANSPOSE.Example 1Print a simple array and its transpose by entering:; Create an array:A = INDGEN(3,3)TRANSA = TRANSP

ExamplesThe following example reads some data from a file, displays it at its original size, then uses CONGRID to resize the array and display the magnified version. ; Select the file. fil

C++We are often asked if IDL can call C++ code. Compatibility with C has always been a strong design goal for C++, and C++ is largely a superset of the C language. It certainly is possible to combin

Here are some general tips for using Call_External.All arrays which need to be passed between IDL and C must be allocated in IDL. This includes both arrays being passed from IDL to C and from C ba

Image Display Commands:The basic IDL direct graphics routines for opening, displaying, and adjusting image display windows are window, which creates a new window and sizes it; wset, which de

help : lists all active variables, their characteristics, compiled programs, information on storage areas, etc.; various options. But does not explain commands. There are many optional keywords for us

To give LINUX system commands from within IDL: enter $ as the first character on the command lineTo interrupt and resume IDL: use the standard ^z and fg LINUX commands.

ProgramsPrograms are structured text files of IDL commands. They can be stored anywhere in your IDL path. There are three different types of programs, each of which interacts slightly differently wi

cgLoadCT, 0, CLIP=[0, 245], /Reverse;cgColorbar,RANGE=[0,1], Division=1, Charsize = 2, /vertical, /right