User:Eml4500.f08.ramrod.olivero

References

Many MATLAB features were not included in the tutorial but they are listed below and organized by their subject area. There are more functions beyond the ones that are included below but these can be located by using the help command. Here are some easy reference charts that will help during the use of MATLAB.

Managing Commands and Functions
help	help facility
what	lists M-files on disk
type	list named M-file
lookfor	key word search through the help entries
which	locate functions and files
demo	run demonstrations
path	control MATLAB's search path
cedit	set parameter for command line editing and recall
version	display MATLAB version you are running
whats new	display toolbox README files
info	info about MATLAB and the Math Works
why	receive flippant answer

Managing Variables and the Workspace
who	lists current variables
whos	lists current variables, long form
save	save workspace variables to disk
load	retrieve variables from disk
clear	clear varaibles and functions from memory
pack	consolidate workspace memory
size	size of vextor
length	length of vector
disp	display martix or text

Working With Files and the Operating System
cd	change current working directory
pwd	show current working directory
dir, ls	directory listing
delete	delete file
getnv	get environment variable
!	execute operating system command
unix	execute operating system command; return result
diary	save text of MATLAB session

Controlling the Command Window
clc	clear command window
home	send cursor home-to top of screen
format	set output format
echo	echo commands inside script commands
more	control paged output in command window

Sarting and Quitting from MATLAB
quit	terminate MATLAB
startup	M-file executed when MATLAB is started
matlabrc	master startup M-file

Matrix Operators	Array Operators
+ addition	+ addition
- subtraction	- subtraction
* multiplication	.* multiplication
^ power	.^ power
/ right division	./ right division
\ left division	.\ left division
' conjugate transpose
.' transpose
kron Kronecker tensor product

Relational and Logical Operators
< less than	& and
<= less than or equal	" or
> greater than	~ not
>= greater than or equal	== equal
zor exlusive or	~ not equal

Special Characters
= assignment statement
[] used to form vectors and matrices; enclose multiple function output variables
() arithmetic expression precedence; enclose function input variables
. decimal point
.. parent directory
... continue statement to next line
, separate subscripts, function arguments, statements
; end rows, suppress printing
% comments
: subscripting, vector generation
! execute operating system command

Special Variables and Constraints
ans	answer when expression not assigned
eps	floating point precision
realmax	largest floating point number
pi	pi
i,j	imaginary unit
inf	infinity
NaN	Not-a-Number
flops	floating point operation count
nargin	number of funciont input arguments
nargout	number of function output arguments
computer	computer type

Time and Date
date	current date
clock	wall clock
etime	elapsed time function
tic, toc	stopwatch timer functions
cputime	elapsed CPU time

Special Matricies
zeros	matrix of zeros
ones	matrix of ones
eye	identity
diag	diagonal
toeplitz	Toeplitz
magic	magic square
compan	companion
linspace	linearly spaced vectors
logspace	lgarithmically spaced vectors
meshgrid	array for 3-D plots
rand	uniformly distributed random numbers
randn	Normally distributed random numbers
hilb	Hilbert
invhilb	inverse Hilbert (exact)
vander	Vandermonde
pascal	Pascal
hadamard	Hadamard
hankel	Hankel
rosser	symmetric eigenvalue test matrix
wilkinson	Wilkinson's eigenvalue test matrix
gallery	two small test matrices

Matrix Manipulation
diag	create or extract diagonals
rot90	rotate matrix 90 degrees
fliplr	flip matrix left-to-right
flipud	flip matrix up-to-down
reshape	change size
tril	lower trangular part
triu	upper triangular part
.'	transpose
:	convert matrix to single column; A(:)

Logival Functions
exist	chich if variables or functions exist
any	true if any element of vector is true
all	true if all elements of vector are true
find	find indices of none-zero elements
isnan	true for NaNs
isinf	true for finite elements
finite	true for finite elements
isieee	true for IEEE floating piont arithmetic
isempty	true for empty matrix
issparse	true for sparse matrix
isstr	true for text string
strcmp	compare string variables

Control Flow
if	conditionally execute statements
else	used with if
elseif	used with if
end	terminate if,for, while
for	repeat statements for a specific number of times
while	repeat statements while condition is true
break	terminate execution of for or while loops
return	return to invoking function
error	display message and abort function

Programming
input	prompt for userinput
keyboard	invoke keyboard as if it were a script file
menu	generate menu of choices for user input
pause	wait for user response
function	define fucntion
eval	execute string with MATLAB expression
feval	evaluate funciont specified by string
global	define gloabal variables
nargchk	validate number of input arguments

Text and Strings
string	about character stings in MATLAB
abs	convert sting to numeric values
balnks	a sting of blanks
eval	evaluate sting with MATLAB expression
num2str	convert nubmer to string
int2str	convert integer to sting
str2num	convert sting to number
isstr	true for sting variables
strcmp	compare sting variables
upper	convert sting to uppercase
lower	convert sting to lowercase
hex2num'	convert hex string to floating point number
hex2dec	convert hex sting to decimal integer
dec2hex	convert decimal integer to hex string

Debuggin
dbstop	set breakpoin
dbclear	remove breakpoint
dbcont	remove execution
dbdown	change loacal workspace context
dbstack	list who called whom
dbstatus	list all breakpoints
dbstep	execute one or more lines
dbtype	list M-file with line numbers
dbup	change local workspace context
dbdown new	opposit of dbup
dbquit	quit dbug mode

Sound Processing Functions
saxis	sound axis scalling
sound	convert vector to sound
auread	Read Sun audio file
auwrite	Write Sun audio file
lin2mu	linear to mu-law conversion
mu2lin	mu-law to linear conversion

Elementary Math Functions
abs	absolute value or complex magnitude
angle	phase angle
sqrt	square root
real	real part
'imag	imaginary part
conj	complex conjugate
gcd	greatest common divisor
lcm	least common multiple
round	round to the nearest integer
fix	round toward zero
floor	round toward negative infinity
ceil	round toward inifinty
sign	signum function
rem	remainder
exp	exponention base e
log	natural logarithm
log10	log base 10

Special Functions
bessel	bessel funciont
beta	beta function
gamma	gamma function
rat	rational approximatnion
erf	error function
erfinv	inverse error function
ellipke	complete elliptic intergral
ellipj	Jacobian elliptic integral
expint	expontential integral
log2' new	dissect floating point numbers
pow2	scale floating point numbers

Matrix Decompostions and Factorizations
inv	inverse
lu	factors from Gaussian elimination
rref	reduced row echelon form
chol	Cholesky factorization
qr	orthogonal-triangular decompostion
nnls	nonnegative least squares
lscov	least squares in presence of known covariance
null	null space
orth	orthogonalization
eig	eigenvalues and eigenvectors
hess	Hessenberg form
schur	Schur decompostition
cdf2rdf	complex diagonal form to real block diagonal form
balance	diagonal scaling for eigenvalue accuracy
qz	generalized eigenvalues
plyeig	polynomial eigenvalue solver
svd	singular value decompostition
pinv	psuedoinverse