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-
- 02/08/1995
-
-
- This is the Macintosh port of RLaB 1.17d program. RLaB is a Matlab-like
- linear algebra package. The author is
-
- Ian Searle
- ians@eskimo.com
-
- 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 extensively uses the BLAS, LAPACK, FFTPACK and
- RANLIB sources available from netlib.att.com and PLPLOT from
- dino.ph.utexas.edu.
-
- MacRLaB is not a full port of RLaB. Some items will probably never
- be fully supported as they are too tied to the Unix operating system.
- Examples are the 'pipe', the 'fork', and many others.
- Other features are handled a little differently in the Mac version.
- Most of the important differences or extensions of the MacRLaB port
- are described below.
-
- 1. Please print out and study the RLaB Primer first, the file is in
- ":doc:rlabp.ps". You can print this Postscript file using 'DropÑPS'
- program (simply drag and drop it onto DropÑPS).
-
- The full history command editing capacity is built-in. To recall
- previous commands, just press up and down arrow keys.
- The 'control' key described in the RLaB Primer can be replaced by the
- 'command' key on the Mac keyboard. Delete-cursor-character (del) is also
- supported. The full description of command line editing is in the file
- ":help:COMMAND_EDIT", or type "help COMMAND_EDIT" in RLaB.
-
- 2. In this version, you can set up your own file search-path(RLAB_SEARCH_PATH),
- start-up file (RLAB_RC0), etc.. The default settings are stored in the file
- 'RLab-Preference'.
-
- To change these settings, just use a text editor to change. You have to
- set the PLPLOT_DIR environmental variable to the path of your RLaB folder.
- This setting is important because PLPLOT has to know the location of font
- files 'plstnd5.fnt' and 'plxtnd5.fnt'. After making the changes, the file
- 'RLab-Preference' has to be placed in the 'System Folder:Preferences' folder.
-
- For example, if your absolute RLaB folder (directory) path is like this
-
- HD --- Appl --- RLaB
-
- then you can put the following environmental variables in 'RLab-Preference':
-
- RLAB_RC0 = "HD:Appl:RLaB:_rlab";
- PLPLOT_DIR = "HD:Appl:RLaB";
- RLAB_HELP_DIR = "HD:Appl:RLaB:help";
- RLAB_LIB_DIR = "HD:Appl:RLaB:rlib";
- RLAB_SEARCH_PATH = ";HD:Appl:RLaB:toolbox;HD:Appl:RLaB:examples";
-
- You can have several search-paths, just put them together and use ';' as
- delimiter (see above example with 3 search paths, first one is for the
- current folder).
-
- If you feel the font/size on the MacRLaB console is not the best choice,
- feel free to change it. The environmental variable RLAB_FONT can be set
- to one of the following numbers (check Mac document for more):
-
- 0 SystemFont
- 1 AppleFont
- 2 NewYork
- 3 Geneva
- 4 Monaco
- 5 Venice
- 6 London
- 7 Athens
- 8 SanFrancisco
- 9 Toronto
- 11 Cairo
- 12 LosAngles
- 20 Times
- 21 Helvetica
- 22 Courier
-
- It is better to use constant width fonts such as Monaco and Courier,
- otherwise the output will not be aligned.
- The font size (RLAB_SIZE) can be set to any number between 1 and 127 point.
- The popular font sizes for the console are
-
- 9 points
- 10 points
- 11 points
- 12 points
- 14 points
- 18 points
-
- You can change the number of text rows (RLAB_ROWS) on the console.
- Default values are
-
- RLAB_FONT = "4 Monaco";
- RLAB_SIZE = "9 points";
- RLAB_ROWS = "25";
-
- The console window width will be set to 80 columns based on the largest
- character width of the selected font.
-
- 3. RLaB comes with a built-in plotting library PLPLOT. PLPLOT is a powerful
- tool for XY and XYZ graphics. It can generate (via plprint) Postscript,
- color Postscript, HP LJ, and lots of other formats for post processing.
-
- I've implemented a minimum Mac interface for PLPLOT4.99i. Multi-window is
- allowed but the redrawing is slow; well, that depends on what machine you
- got. The number of windows is limited to 10.
-
- The mac-plplot interface is based on ColorQuickDraw routines. Sixteen
- colors are directly available in PLPLOT. These colors are pre-assigned
- as the following numbers:
-
- 1 2 3 4 5 6 7 8
- black red yellow green aquamarine pink wheat gray
-
- 9 10 11 12 13 14 15 16
- brown blue blueviolet cyan turquoise magenta salmon white
-
- You can select color by _plcol() function. More colors are available by
- using RGB combinations (see PLPLOT manual). There are three things remained
- to be done -- add scroll bar to the MacRLaB window, add copy/paste ability
- in the graphics windows, and add PICT image to the generated EPSF files.
-
- You can include the PLPLOT generated Postscript output (EPSF) in your
- document (Word, MacDraw, Canvas, TeX, ...) but you can only see a
- big crossed box (the bounding box) on the screen due to the lack of the
- PICT image. You can perform scaling, rotating, dragging,... on the box
- except there is no picture inside. Don't worry, the picture will appear
- in the printed copy.
-
- If you need superscript, subscript, over/under line char, and Greek letters
- in annotation of axis, title, etc., then you need to get a copy of PLPLOT
- manual. See README.PLPLOT for detail.
-
- There is a plotting example in ":examples:plot_test.r", try
-
- >rfile plot_test
-
- You can click on those background windows to see them again. The graphics
- windows are numbered as plplot 0, plplot 1, plplot 2, ..., and so on. You
- can also resize or drag them. Resizing on the screen will not affect
- the quality of later plprint() output.
-
- For each graph window, there is a temporary file (SCRATCH????)
- associated with it. It contains your plotting commands which can be used
- later to produce a Postscript or other types of graphics file (via
- plprint). It is also used by my Mac interface in redrawing. Don't dump
- them into trash can during the execution of MacRLaB. They will be
- automatically eliminated after the execution. Also, don't use pend()
- to close graphics windows unless you don't want to plot anymore. Use
- pclose() instead. plplot has a bug that it does not close the plotting
- command file even you close the graphics window by pend() or pclose().
- So if you plot after pend(), the old picture together with the new picture
- will appear on the graphics window.
-
- If you plot several pages of PS graph into a file, you have to change
- the file type to 'TEXT' (all capital) by drag and drop the file onto
- ctc 1.5. After the file type has been changed, you can print it out
- by DropÑPS or ShowPages. Why? Because plplot creates the PS output file
- in binary mode, but DropÑPS and ShowPages accept only TEXT file.
-
- 4. By the way, do you know how to change directory (folder) using cd() on the
- Mac?
-
- Suppose your hard disk directory tree is like this
-
- ----- Peggy
- | |-- rlib
- --------- App -----| |
- | | |-- examples
- HD ---| ----- RLaB (you are here) ----|
- | |-- help
- -------- Kevin |
- |-- toolbox
-
- When you launch RLaB, you are in RLaB directory. If you wish to
- change directory to "examples", you can use either
-
- >cd(":examples"); // relative method
-
- or
-
- >cd("HD:App:RLaB:examples"); // absolute method
-
- The colon ":" means present directory, it is similar to "." on the Unix
- but not exactly the same. You MUST supply a ":" as first char if partial
- (relative) pathname is used. If the first character of a pathname is not
- a ":", it is a full (absolute) pathname. Two colons "::" means parent
- directory (folder). Three colons ":::" means grandparent directory.
- The ":" character also acts as directory delimiter, like "/" on the unix
- and "\" on the MS-DOS.
-
- For example, if your work directory is in Kevin and you are in
- RLaB now, you can use either
-
- >cd(":::Kevin"); // relative method
-
- or
-
- >cd("HD:Kevin"); // absolute method
-
- to change directory to Kevin.
-
- 5. Your machine must have a 68020 or better cpu run MacRLaB. You also need
- System 7 to run it. If your machine does not have an fpu (68881 or
- better) then you should run MacRLaB-nofpu instead of MacRLaB.
- The execution speed of MacRLaB is approximately 7.5 times faster than
- MacRLaB-nofpu.
-
- Try
-
- >load("test")
-
- on your machine to see if your machine can pass all tests.
-
- 6. The total size of arrays is only limited by the available memory of your
- machine. If RLaB runs out of memory, it will display
-
- RLaB: out of memory.
-
- on the screen. You can either increase RLaB memory using 'Get Info' of
- System 7 Finder or, if your physical RAM is limited, turn on the virtual
- memory and set the memory size large enough for your application.
-
- 7. To interrupt RLaB during execution, type command-. (i.e. press command
- key + period key), it will return to the interactive mode in the next i/o.
- To abort RLaB and kick it out, you can use File-Quit (command-Q) on Menu bar.
- You can also do so by type in command-d at the beginning of a command
- line, or type "quit" directly.
- If RLaB hangs, press command-option-esc to abort it.
-
- 8. The source code of mac version is merged in the rlab source code
- distribution (see :misc:ftp-sites). Those statements within
- #ifdef THINK_C ... #endif
- are my modifications for THINK C 7.03 compiler on the Mac. I've modified the
- console user interface. Three difference files diff1, diff2, and diff3
- tell you those modifications (they are in :misc:MAC). You also need f2c
- and POSIX libraries. They are available in info-mac archives.
-
- 9. If you wish to join the RLaB community, send an email to Ian
- (ians@eskimo.com) and ask him to add your name in the mailing list.
- You can reach the RLaB community by sending email to rlab-list@eskimo.com.
-
- 10. We need more toolboxes. Please send your useful rfiles to Ian. Thanks.
-
- 11. THIS IS FREE SOFTWARE. THERE IS NO WARRANTY FOR THE PROGRAM. USE IT AT
- YOUR OWN RISK.
-
- Have fun!
-
- Tzong-Shuoh Yang
- (tsyang@ce.berkeley.edu)
-