MATLAB(1) (piggot) MATLAB(1)
NAME
matlab - interactive matrix desk calculator
SYNOPSIS
/usr/lbin/matlab
DESCRIPTION
Matlab reads commands from the standard input and manipu-
lates complex matrices. Special cases include real matrices
and scalars. Operations include pseudoinversion (which is
inversion for square nonsingular matrices), eigendecomposi-
tion, various other factorizations, solution of linear equa-
tions, matrix products (including inner and outer products),
Kronecker products, log, exponential and trigonometric func-
tions of matrices, and rank and condition estimation. Vari-
ables are alphanumeric strings of at most 4 characters.
Case is ignored. Expressions and assignment statements are
written as in Fortran, and multiple statements can be put on
one line, separated by either a comma or a semicolon; the
result of a statement is written on the standard output
unless a semicolon follows the statement. Extensions to
Fortran notation include:
Matrix construction from elements. Elements in a row are
separated by commas; columns are separated by semicolons;
matrices are surrounded by < > brackets.
Transpose is indicated by postfix prime ' .
Consecutive integers are denoted by colons in the style 1:4
or 1:8:2 (meaning 1,3,5,7).
Identity matrix is denoted `eye'; its dimensions are dic-
tated by context.
Reverse division is denoted by \ . For example, `x = A \ b'
is roughly the same as `x = inv(A) * b', except that Gaus-
sian elimination, if applicable, is used to compute x.
Some matlab commands:
help
help word
List commands and functions; `help word' lists informa-
tion on word. It is useful to look over the complete
help file and the MATLAB User's Guide (see below).
save('file')
save('file[,var]...')
Save all current variables, or just the designated
variables in file.
MATLAB(1) (piggot) MATLAB(1)
load('file')
Restore saved variables.
exec('file')
Execute the commands in file before reading more com-
mands from the standard input.
Matlab can be called as a subroutine - for details, see the
MATLAB User's Guide or type `help user'.
FILES
/usr2/matlab/help - original help file.
/usr/llib/mathelp.dac and /usr/llib/mathelp.idx - direct-
access help file.
/usr2/matlab - source directory.
/usr2/matlab/src/helper.f edit this to change location of
the direct-access help file, then do `make' in the
(above) matlab source directory.
/usr2/matlab/demo - demonstration file: use
exec('/usr2/matlab/demo')
SEE ALSO
Cleve Moler, `MATLAB User's Guide', Technical Report CS81-1
(Revised), Dept. of Computer Science, University of New
Mexico, 1982.