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Institut für Astronomie und Astrophysik
Abteilung Astronomie
Sand 1, D-72076 Tübingen, Germany![[Uni logo]](/unilogo_small.gif)
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Institut für Astronomie und AstrophysikAbteilung AstronomieSand 1, D-72076 Tübingen, Germany |
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The procedures in this directory are general utility procedures that do not involve astronomy. They are included here either because they are required by an astronomy-related procedure, or because they are thought to be of sufficient general interest.
The procedure ASTROLIB
defines the non-standard system variables !TEXTOUT,
!TEXTUNIT and !DEBUG which some Astronomy Library
procedures require to be defined before they can compile
| ASTROLIB | Add the non-standard system variables used by the IDL Astronomy Library |
| BLKSHIFT | Shift a block of data to a new position in a file (possibly overlapping) |
| BOOST_ARRAY | Append one array onto a destination array |
| BREAK_PATH() | Breaks up a path string into its component directories. |
| BSORT | Function to sort data into ascending order, like a simple bubble sort. |
| CHECKSUM32 | To compute the 32bit checksum of an array (ones-complement arithmetic) |
| CIRRANGE | To force an angle into the range 0 <= ang < 360. |
| CONCAT_DIR | To concatenate directory and file names for current OS. |
| CONV_UNIX_VAX | To convert Unix IDL data types to Vax IDL data types. |
| CONV_VAX_UNIX | To convert VAX IDL data types to UNIX (Sun,MIPS,etc.) IDL data types. |
| DEF_DIRLIST | Define directory list using setenv or setlog |
| DELVARX | Delete variables for memory management (can call from routines) |
| DETABIFY | Replaces tabs in character strings with appropriate number of spaces |
| EXPAND_TILDE() | Expand tilde in UNIX directory names |
| F_FORMAT | Choose a nice floating format for displaying an array of REAL data. |
| FDECOMP | Routine to decompose file name(s) for any operating system. V5.3 or later |
| FIND_ALL_DIR() | Finds all directories under a specified directory. |
| FIND_WITH_DEF() | Searches for files with a default path and extension. |
| FINDPRO | Find all locations of a procedure in the IDL !PATH |
| FORPRINT | Print a set of vectors by looping over each index value. |
| FSTRING | Wrapper around STRING function to fix pre-V5.4 1024 formatting size limit |
| GETFILES | Prompt the user to interactively specify a list of files |
| GETLOG | Formats a logical directory for the given operating system. |
| GETOPT | Convert a string supplied by the user into a valid scalar or vector |
| GETPRO | Search !PATH for a procedure, and copy into user's working directory |
| GETTOK | Retrieve the first part of a (vector) string up to a specified character |
| HGREP | Find a substring in a FITS header (or any other string array) |
| HOST_TO_IEEE | Translate an IDL variable from host to IEEE representation |
| HPRINT | Print a FITS header (or other string array) one line at a time |
| IDL_VALIDNAME() | Modify a string if necessary, so that it can used as a IDL variable name. |
| IEEE_TO_HOST | Translate an IDL variable from IEEE-754 to host representation |
| IS_IEEE_BIG | Determine if the current machine uses IEEE, big-endian numbers. |
| LIST_WITH_PATH | Search for files in a specified directory path. |
| MAKE_2D | Change from 1-d indexing to 2-d indexing |
| MATCH | Routine to match values in two vectors. |
| MINMAX | Return a 2 element array giving the minimum and maximum of an array |
| MRD_SKIP | Skip a number of bytes from the current location in a file or a pipe |
| N_bytes() | To return the total number of bytes in data element |
| NINT | Nearest integer function. |
| NULLTRIM | Trim a string of all characters after and including the first null |
| NUMLINES() | Return the number of lines in a file This procedures became mostly obsolete in V5.6 with the introduction of the FILE_LINES() procedure |
| ONE_ARROW | Draws an arrow labeled with a single character on the current device |
| ONE_RAY | Draw a line with a specified starting point, length, and angle |
| ORDINAL | Convert an integer to a correct English ordinal string: |
| OSFCNVRT | Return the correctly formatted logical directory syntax for the host OS |
| PRODUCT() | Calculate the product of all the elements of an array |
| QGET_STRING | To get a string from the keyboard without echoing it to the screen. |
| RDFLOAT | Quickly read a numeric ASCII data file into IDL floating/double vectors. |
| READ_KEY | To read a keystroke and return its ASCII equivalent |
| READCOL | Read a free-format ASCII file with columns of data into IDL vectors |
| READFMT | Quickly read a fixed format ASCII data file into IDL variables. |
| REM_DUP | Function to remove duplicate values from a vector. |
| REMCHAR | Remove all appearances of character (char) from string (st) |
| REMOVE | Contract a vector or up to 7 vectors by removing specified elements |
| REPSTR | Replace all occurences of one substring by another. |
| SCR_ATTRIB | To set the screen attribute to those given, in the given order. |
| SCR_CHARSET | To change the character sets. |
| SCR_CURMOV | To mov the cursor around the screen relative to its original position. |
| SCR_CURPOS | To position the cursor at the specified screen location. |
| SCR_ERASE | To erase portions of the terminal screen. |
| SCR_OTHER | To allow the user to issue any ESCAPE sequence. |
| SCR_RESET | To reset the terminal. |
| SCR_SCROLL | Define the scrolling area on the screen. |
| SCREEN_SELECT | Allow a user to make an interactive screen selection from a list |
| SELECT_O | Dumb-terminal routine to let a user interactively select from a list |
| SELECT_W | Create a non-exclusive widget menu of items |
| SPEC_DIR | Complete a file specification by appending the default disk or directory |
| STORE_ARRAY | Insert array INSERT into the array DESTINATION |
| STR_INDEX() | Get indices of a substring (SUBSTR) in string. |
| STRN | Convert a number to a string and remove padded blanks. |
| STRNUMBER() | Function to determine if a string is a valid numeric value. |
| TEXTCLOSE | Close a text outpu file previously opened with TEXTOPEN |
| TEXTOPEN | Open a device specified by TEXTOUT with unit !TEXTUNIT |
| TO_HEX | Translate a non-negative decimal integer to a hexadecimal string |
| VALID_NUM | Check if a string is a valid number representation. |
| VECT | Print a set of numbers as a string with delimiters included |
| WHERENAN | Find the indices of all IEEE NaN values in an array. |
| ZPARCHECK | Routine to check user parameters to a procedure |
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