home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
CD-ROM Today - The Disc! 5
/
CD-ROM Today - The Disc (Issue 5)(November 1994).ISO
/
mac
/
Mac shareware
/
Education
/
RLaB
/
help
/
RLAB
< prev
next >
Wrap
Text File
|
1994-09-21
|
5KB
|
151 lines
NAME
RLaB - matrix oriented, interactive programming environment
SYNOPSIS
rlab [-Vdlmnpqr] [file(s)] [-]
DESCRIPTION
rlab is an interpreter for the RLaB Programming
Language/Environment. The RLaB language is useful for matrix
or array oriented numerical analyses. RLaB is especially
useful for prototyping and experimenting with algorithms.
rlab also provides a convenient interface to many of the
LAPACK, FFTPACK, and RANLIB subroutines.
OPTIONS
-V Prints the version number to stderr and exits.
-d causes a readable form of the internal stack machine's
compiled program to be output to stderr. This option
should be used in conjunction with `-qln' options. This
option is not intended for general use.
-l prevents loading of the rlab library of rfiles.
-m prevents printing of the greeting message.
-n prevents line number and file name information from
being used in the internal stack machine codes. This
option should only be used with the `-dlnq'. This
option is not intended for general use.
-p prevents rlab from using the specified pager for all
output.
-q prevents loading of the startup file
-r prevents usage of the GNU readline library for command
line editing.
file(s)
are loaded and executed by rlab after the `.rlab' file,
and after the library files.
- forces rlab to go interactive after all the files on
the command line have been executed.
ENVIRONMENT
rlab checks the values of several environment variables upon
Version 0.95 beta 3 October 1993 1
startup, and uses them to overide the compiled in defaults.
If a particular environment variable has not been set, the
default value is used.
RLAB_RC0 Startup rfile.
RLAB_HELP_DIR The principle directory of help files.
RLAB_LIB_DIR The directory of rfiles to load on startup.
RLAB_PAGER The pager to use for paging help files to the
screen. If RLAB_PAGER is not set, then the environment is
checked for PAGER . If neither exists, then the pager speci-
fied at compile time is used.
RLAB_SEARCH_PATH The set of directories to search when
attempting to load rfiles.
EXECUTION
rlab is normally executed from a shell command line. Upon
startup rlab
Processes the command line options and files.
Executes the `.rlab' file.
Executes any `.r' files in the library directory.
Executes any files specified on the command line.
Goes into interactive mode if no files are specified on the
command line, or if the `-' option is used.
rlab can also be invoked by using the `#!' convention
employed by exec(2). A rlab script that begins with a line
of the form:
#! pathname [arg]
where pathname is the full pathname to the rlab executable,
and arg is optional argument(s). Note that if the `-' option
is not specified rlab will not go interactive after the
script has been executed.
DOCUMENTATION
rlab has an on-line help system, which can be accessed by
typing `help'. A tutorial and a reference manual are
currently being worked on.
This man-page was not intended to provide a description of
Version 0.95 beta 3 October 1993 2
the language, or rlab's features. Please refer to the manu-
als, or the on-line help.
BUGS
Paged output gets hosed after an `out of memory' message.
rlab implements fprintf(), printf() and sprintf() using the
C library functions, fprintf, printf and sprintf, so rlab
inherits any bugs or limitations of the library functions.
Using the load() function on the same line as another
expression may cause the other expression to be ignored. For
example:
load ("test.r"); a = 100
Will result in the second expression being ignored. This is
caused by the original syntax being used with the new
parser/machine capability. What happens: the tokens for the
second expression get wiped out when the parser is called to
start parsing the statements in test.r. The workaround is
simple; don't put calls to load() on the same line as other
expressions. This bug will be fixed in one or two releases.
Send bug reports to: ians@eskimo.com.
Bug reports should include the rlab version number, a short
rfile that exercises the bug, and a description of the host
operating system and hardware.
AUTHORS
Ian Searle (ians@eskimo.com)
Phillip Musumeci is the author of the RLaB Tutorial (Not
Available Yet)
Brad Hards is the author of the RLaB Reference Manual (Not
Available Yet)
Mike Brennan has contributed some code from mawk.
SEE ALSO
sh (1) more (1) exec (2)
Version 0.95 beta 3 October 1993 3