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- ** RLaB Version 0.83 beta Available
-
- For those of you already familar with RLaB, version 0.83 is
- available. With this release development status is changed
- from alpha, to beta. For those of you not familar with RLaB,
- an edited version of the original announcement follows below.
-
- A mailing-list has been created to facillitate discussion
- amoungst RLaB users.
-
- -------------------------------------------------------------
- Mailing List Info
-
- To be added or dropped:
-
- Send mail to rlab-request@eskimo.com
- This is read by a human, so no special syntax is required,
- just state your desire.
-
- To communicate with others on the list:
-
- Send your message to rlab-list@eskimo.com
-
- -------------------------------------------------------------
-
- Enjoy,
- Ian Searle
- ians@eskimo.com
-
-
- Original Announcement (edited/updated/corrected)
-
- RLaB is a "MATLAB-like" matrix-oriented programming
- language/toolbox. RLaB was in closed alpha testing for roughly
- 8 months, and has been in public alpha testing for roughly 6
- months.
-
- ** Description:
-
- RLaB is _not_ a clone of languages such as those used by tools
- like MATLAB # or matrix_X/Xmath ##. However, as RLaB focuses
- on creating a good experimental environment (or laboratory) in
- which to do matrix math, it can be called "MATLAB-like" since
- its programming language possesses similar operators and
- concepts. Extensive use has been made of the LAPACK, FFTPACK
- and RANLIB sources available from netlib.
-
- The most significant difference between the other proprietary
- tools and RLaB is the GNU Copyleft.
-
- RLaB has several types: numeric, string, function, and list.
-
- numeric: real or complex
- scalar, 1 or 2 dim array (matrix)
- string: scalar, 1 or 2 dim array (matrix)
- function: builtin, or user-written
- list: A heterogeneous associative array
- (user-defined structure)
-
- A set of built-in functions is provided, as well as a
- capability to write your own functions in the RLaB language.
- The language contains IF, FOR, and WHILE flow control
- constructs, and a set of arithmetic, relational, and logical
- operators.
-
- The following is a list of the currently available functions:
-
- abs conj floor matrix rank std
- acos cos format max rcond strsplt
- acosh cosh fprintf maxi read sum
- all cross getline mean readm svd
- any cumprod hess members real symm
- asin cumsum hilb min redit system
- asinh det ifft mini reshape tan
- atan diag imag mod round tanh
- atan2 diary inf name save tic
- atanh diff int nan scalar toc
- backsub eig inv norm show trace
- balance epsilon isinf ode23 sign tril
- cd error isnan ones sin triu
- ceil exist length pause sinh type
- chol exp linspace pclose size what
- class eye load plot solve who
- clear factor log printf sort whos
- clearall fft log10 prod sprintf write
- close find logspace qr sqrt writem
- compan fix lu rand srand zeros
-
- angle bandred chop detrend erf fliplr
- flipud funm gamma house lagrange max2
- min2 ode78 pinv poly polyval qq_normal
- quad rem rk4 roots trapz
-
- The following is an example of a RLaB function:
-
- //
- // Modified Gram-Schmidt
- // Given A (MxN), with rank(A) = N. The following algorithm computes
- // the factorization A = Q*R (skinny QR) where Q (MxN) has orthonormal
- // columns and R (NxN) is upper triangular
- //
- // Algorithm from MATRIX Computations,
- // G.H. Golub, C.F. Van Loan (page 219)
- //
-
- mgs = function(A)
- {
- local(a,k,j,n,m,q,r); // default variable scope is global
-
- a = A; // args passed by reference
- m = a.nr;
- n = a.nc;
- for(k in 1:n)
- {
- r[k;k] = norm( a[1:m;k], "2" );
- q[1:m;k] = a[1:m;k]/r[k;k];
- for(j in k+1:n)
- {
- r[k;j] = q[1:m;k]' * a[1:m;j];
- a[1:m;j] = a[1:m;j] - q[1:m;k] * r[k;j];
- }
- }
- return << q = q; r = r >>; // return a list
- }
-
- ** Documentation:
-
- 1) A Complete RLaB Reference Manual is "in the works".
-
- 2.) There are several tutorials in the ./doc directory that
- can be used until the reference manual is complete.
-
- 3) On-line help is present, and evolving (that is what you say
- when something can only get better :-)
-
- ** Implementation:
-
- RLaB is written in C. Although ANSI-C features have been used,
- they can be turned off. RLaB has been compiled with Sun's
- non-ANSI cc. The goal is, and will continue to be, to make
- RLaB as portable as possible.
-
- LAPACK, FFTPACK, and RANLIB Fortran libraries are used.
- Currently f2c'ed versions of these libraries are available. It
- is possible to use native Fortran libraries. In the future the
- choice of Fortran, or f2c will be selectable during configure.
- For the time being all that is needed is a C compiler, and the
- f2c libraries (available from netlib).
-
- GNUPLOT 3.x is used to handle the interactive plotting.
-
- Users are expected to obtain: GNUPLOT (prep.ai.mit.edu),
- libI77.a libF77.a (from the f2c distribution,
- research.att.com) themselves.
-
- Rlab has been ported to: SVR4 (i486)
- DECstation 3100 (Ultrix 4.x)
- Sun 4 (Sun OS-4.x)
- IBM RS/6000
- SGI
- Titan P3000 (Sys Vr3.?/BSD)
- NeXT
- Linux
- 386BSD
-
- ** Current Status:
-
- Beta test.
-
- ** Bug Reports:
-
- Send bug reports, comments, complaints, suggestions, or
- whatever to: ians@eskimo.com. Please include a script which
- exercises the bug, along with a description of the hardware
- and software platform.
-
- ** Acknowledgements:
-
- I would like to thank Phillip Musumeci and Brad Hards for
- volunteering to do the bulk of the documentation.
-
- I would like to thank Mike Brennan, Scott Hunziker, Dave
- Wilson, and Don Morris. I would also like to acknowledge the
- alpha testers who have made invaluable contributions.
-
- ** Where to get it:
-
- At present there are several ftp sites, all graciously
- donated, they are:
-
- evans.ee.adfa.oz.au in: /pub/RLaB
- mizar.docs.uu.se in: /pub/gnu/RLaB
-
- The set of files to get is:
- rlab-0.83.tar.Z
- rblas.tar.Z BLAS library
- rlap-0.30.tar.Z LAPACK library
- rfft-0.11.tar.Z FFTPACK library
- rnlib-0.11.tar.Z RANLIB library
-
- Please try and get the sources during non prime time hours.
-
- Enjoy...
-
- Ian Searle
- ians@eskimo.com
-
- # MATLAB is a trademark of The Math Works.
- ## matrix_X and Xmath are trademarks of I.S.I.
-