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+.TH MATLAB 1
+.CT 1 numbers
+.SH NAME
+matlab \(mi interactive matrix desk calculator
+.SH SYNOPSIS
+.B /usr/lbin/matlab
+.SH DESCRIPTION
+.I Matlab
+manipulates complex matrices interactively.
+Special cases include
+real matrices and scalars.
+Operations include pseudoinversion (which
+is inversion for square nonsingular matrices), eigendecomposition,
+various other factorizations, solution of linear equations, matrix
+products (including inner and outer products), Kronecker products,
+log, exponential and trigonometric functions of matrices, and rank and
+condition estimation.
+.PP
+Variables are alphanumeric strings of at most
+4 characters.
+Case is ignored.
+Expressions and assignment statements are written
+as in Fortran.
+Multiple statements can be put on one line,
+separated by either comma or semicolon; the result of a statement
+is written on the standard output unless a semicolon follows the statement.
+Extensions to Fortran notation include:
+.PP
+.I Matrix construction
+from elements.
+Elements in a row are separated by commas; columns are
+separated by semicolons; matrices are surrounded by
+.L  < >
+brackets.
+.PP
+.I Transpose
+is indicated by postfix prime
+.LR ' .
+.PP
+.I Consecutive integers
+are denoted by colons in the style 1:4 or 1:2:8 (meaning 1,3,5,7).
+.L A(2:5)
+is a subarray;
+.L A(:,j)
+is a column.
+.PP
+.I Identity
+matrix is denoted 
+.LR eye ;
+its dimensions are dictated by context.
+.PP
+.I Reverse division
+is denoted by \e .
+For example,
+.L x = A \e b
+is roughly the same as
+.LR "x = inv(A) * b" ,
+except that Gaussian elimination, if applicable, is used to compute
+.IR x .
+.PP
+Some
+.I matlab
+commands:
+.TP
+.B help
+.PD0
+.TP
+.BI help " word"
+List commands and functions, or specific information about a
+.IR word :
+.IP
+.ft 5
+.nf
+ABS   ANS   ATAN  BASE  CHAR  CHOL  CHOP  CLEA  COND  CONJ  COS 
+DET   DIAG  DIAR  DISP  EDIT  EIG   ELSE  END   EPS   EXEC  EXIT
+EXP   EYE   FILE  FLOP  FLPS  FOR   FUN   HESS  HILB  IF    IMAG
+INV   KRON  LINE  LOAD  LOG   LONG  LU    MACR  MAGI  NORM  ONES
+ORTH  PINV  PLOT  POLY  PRIN  PROD  QR    RAND  RANK  RCON  RAT 
+REAL  RETU  RREF  ROOT  ROUN  SAVE  SCHU  SHOR  SEMI  SIN   SIZE
+SQRT  STOP  SUM   SVD   TRIL  TRIU  USER  WHAT  WHIL  WHO   WHY 
+.fi
+.TP
+.BI save(' file ')
+.TP
+.BI save(' file \fR[\fB, var \fR]...\fB')
+Save all current variables,
+or just the designated variables in
+.I file.
+.TP
+.BI load(' file ')
+Restore saved variables.
+.TP
+.BI exec(' file ')
+Execute the commands in
+.I file
+before reading more commands from the standard input.
+.PD
+.PP
+.I Matlab
+can be called as a subroutine.
+For details, see the reference or
+type
+.LR "help user" .
+.SH FILES
+.F /usr/lib/mathelp.dac
+.br
+.F /usr/lib/mathelp.idx
+.SH "SEE ALSO"
+Cleve Moler,
+.I MATLAB User's Guide,
+Technical Report CS81\-1 (Revised), Dept.
+of Computer Science, University of New Mexico, 1982.
+(Available in troff form with the Matlab source.)