Glossary

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Glossary Entries
Word(s)	Definition	Image	Caption	Link	Source
-	Minus; subtraction operator
*	Scalar and matrix multiplication operator
*	Array multiplication operator
^	Scalar and matrix exponentiation operator
+	Plus; addition operator
_	Quote sign and transpose operator
-	solid
--	dashed
-.	dash dotted
,	Comma; separates statements and elements in a row
;	Semicolon; separates columns and suppresses display
;	Suppresses screen printing
:	Colon; generates regularly spaced elements and represents an entire row or column
:	dotted
.	Decimal point
.	point
._	Nonconjugated transpose operator
…	Ellipsis; line-continuation operator
.^	Array exponentiation operator
( )	Parentheses; encloses function arguments and array indices; overrides precedence
[ ]	Brackets; enclosures array elements
*	star
/	Right-division operator
/	Array right-division operator
\	Left-division operator
\	Array left-division operator
\n	Insert a new line in the output string
\t	Insert a tab in the output string
&	Logical operator: AND
%	Percent sign; designates a comment and specifies formatting
%d	Format as an integer
%e	Format as a floating point value in scientific notation
%f	Format as a floating point value
%g	Format in the most compact form: %f or %e
%s	Format as a string
^	triangle (up)
+	plus
<	triangle (left)
<	Relational operator: less than
<=	Relational operator: less than or equal to
=	Assignment (replacement) operator
==	Relational operator: equal to
>	triangle (right)
>	Relational operator: greater than
>=	Relational operator: greater than or equal to
\|	Logical operator: OR
~	Logical operator: NOT
~=	Relational operator: not equal to
abs(x)	Absolute value; \|x\|
acos(x)	Inverse cosine; arcos x = cos –1 (x)
acosh(x)	Inverse hyperbolic cosine; cosh –1 (x)
acot(x)	Inverse cotangent; arccot x = cot –1(x)
acoth(x)	Inverse hyperbolic cotangent; coth –1 (x)
acsc(x)	Inverse cosecant; arcs x = csc –1 (x)
acsch(x)	Inverse hyperbolic cosecant; csch –1 (x)
all	True if all elements are nonzero
angle(x)	Angle of a complex number x
ans	Most recent answer
any	True if any elements are nonzero
asec(x)	Inverse secant; arcsec x = sec –1 (x)
asech(x)	Inverse hyperbolic secant; sech –1 (x)
asin(x)	Inverse sine; arcsin x = sin –1 (x)
asinh(x)	Inverse hyperbolic sine; sinh –1 (x)
atan(x)	Inverse tangent; arctan x = tan –1 (x)
atan2(y,x)	Four-quadrant inverse tangent
atanh(x)	Inverse hyperbolic tangent; tanh –1 (x)
axes	Creates axes objects
axis	Sets axis limits
b	blue
bar	Creates bar chart
bar	Creates a bar chart
break	Terminates execution of a loop
c	cyan
case	Provides alternate execution paths within switch structure
cat	Concatenates arrays
cd	Changes current directory
ceil	Rounds to the nearest integer toward •
cell	Creates cell array
celldisp	Displays cell array
cellplot	Displays graphical representation of cell array
char	Creates character string array
class	Returns the class of an expression
clc	Clears Command window
clear	Removes variables from memory
clock	Current date and time as date vector
close	Closes the current plot
close all	Closes all plots
collect	Collects coefficients of like powers in an expression
conj(x)	Complex conjugate of x
contour	Creates contour plot
conv	Computes product of two polynomials
cos(x)	Cosine; cos(x)
cosh(x)	Hyperbolic cosine; cosh(x)
cot(x)	Cotangent; cot(x)
coth(x)	Hyperbolic cotangent; cosh(x)/sinh(x)
cputime	CPU time in seconds
cross	Computes cross products
csc(x)	Cosecant; csc(x)
csch(x)	Hyperbolic cosecant; 1/sinh(x)
d	diamond
date	Displays current date
deal	Matches input and output lists
deconv	Computes ratio of polynomials
delete	Deletes a file
det	Computes determinant of an array
det	Returns the determinant of a matrix
diary	Switches on/off diary file recording
diff	Returns the derivative of an expression
diff(x)	Computes the difference between adjacent elements in the vector x
digits	Sets the number of decimal digits used to do variable precision arithmetic
dir	Lists all files in current directory
Dirac	Dirac delta function (unit impulse)
disp	Displays contents of an array or string
dot	Computes dot products
double	Converts an expression to numeric form
dsolve	Returns a symbolic solution of a differential equation or set of equations
eig	Computes the eigenvalues of a matrix
eig	Returns the eigenvalues (characteristic roots) of a matrix
else	Delineates alternate block of statements
elseif	Conditionally executes statements
end	Terminates for, while, and if statements
eps	Accuracy of floating-point precision
erf(x)	Computes the error function erf (x)
error	Display error messages
eval	Interpret strings containing Matlab expressions
exist	Checks for existence of file or variable
exp(x)	Exponential; ex
expand	Expands an expression by carrying out jpowers
eye	Creates an identity matrix
ezplot	Generates a plot of a symbolic expression
factor	Factors an expression
feval	Function evaluation
fieldnames	Returns field names in a structure array
figure	Opens a new figure window
find	Finds indices of nonzero elements
find	Finds indices of nonzero elements
findstr	Finds occurrences of a string
findsym	Finds the symbolic variables in a symbolic expression
finite	True if elements are finite
fix	Rounds to the nearest integer toward zero
floor	Rounds to the nearest integer toward - •
fmin	Finds minimum of single-variable function
fmins	Finds minimum of multivariable function
for	Repeats statements a specific number of times
format	Controls screen-display format
format +	Positive, negative, or zero
format bank	Two decimal digits
format compact	Suppresses some line feeds
format long	16 decimal digits
format long e	16 digits plus exponents
format loose	Resets to less compact display mode
format rat	Rational approximation
format short	Four decimal digits (default)
format short e	Five digits plus exponent
fplot	Intelligent plotting of functions
fprintf	Performs formatted writes to screen or file
fscanf	Read formatted data from a file
function	Creates a user-defined function M-file
fzero	Finds zero of single-variable function
g	green
gensig	Generates a periodic sine, square, or pulse input
getfield	Returns field contents of a structure array
global	Declares variables to be global
global	Define global variables
grid	Displays gridlines
gtext	Enables label placement by mouse
h	hexagram
Heaviside	Heaviside function (unit step)
help	Searches for a help topic
hist	Aggregates the data into equally spaced bins
histc	Aggregates the data into unequally spaced bins
hold	Freezes current plot
i,j	The imaginary unit −1
if	Executes statements conditionally
ilaplace	Returns the inverse Laplace transform
imag(x)	Imaginary part of a complex number x
Inf	Infinity
input	Displays prompts and waits for input
int	Returns the integral of an expression
interp1	Linear and cubic-spline interpolations of a function of one variable
interp2	Linear interpolation of a function of two variables
inv	Computes inverse of a matrix
inv	Returns the inverse of a matrix
iscell	Identifies cell array
isempty	True if matrix is empty
isfield	Identifies a structure array field
isinf	True if elements are infinite
isnan	True if elements are undefined
isreal	True if all elements are real
isstruct	Identifies a structure array
k	black
laplace	Returns the Laplace transform
legend	Legend placement by mouse
length	Computers number of elements
limit	Returns the limit of an expression
linspace	Creates regularly spaced vector
load	Loads workspace variables from a file
log(x)	Natural logarithm; ln(x)
log10(x)	Common (base 10) logarithm; log(x)= log10(x)
loglog	Creates log-log plot
logspace	Creates logarithmically spaced vector
lookfor	Searches help entries for a keyword
m	magenta
max	Returns largest element
mean	Calculates the average
median	Calculates the median
mesh	Creates three-dimensional mesh surface plot
meshc	Same as mesh with contour plot underneath
meshgrid	Creates rectangular grid
meshz	Same as mesh with vertical lines underneath
min	Returns smallest element
NaN	Undefined numerical result (not a number)
nargin	Number of function input arguments
nargout	Number of function output arguments
num2cell	Converts numeric array to cell array
numden	Returns the numerator and denominator of an expression
o	circle
ode113	Nonstiff, variable-order solver
ode15s	Stiff, variable-order solver
ode23	Nonstiff, low-order solver
ode23b	Stiff, low-order solver
ode23s	Stiff, low-order
ode23t	Moderately stiff, trapezoidal rule solver
ode45	Nonstiff, medium-order solver
odeset	Creates integrator options structure for ODE solvers
ones	Creates an array of ones
otherwise	Default part of switch statement
p	pentagram
path	Displays search path
pi	The number π
pinv	Computes pseudoinverse of a matrix
plot	Generates xy plot
plot3	Creates three-dimensional plots from lines and points
polar	Creates polar plot
poly	Computes polynomial from roots
poly	Returns the characteristic polynomial of a matrix
poly2sym	Converts a polynomial coefficient vector to a symbolic polynomial
polyder	Differentiates a polynomial, a polynomial product, or a polynomial quotient
polyfit	Fits a polynomial to data
polyval	Evaluates polynomial and generates error estimates
pretty	Displays an expression in a form that resembles typeset mathematics
print	Prints plot or saves plot to a file
prod	Product of each column
pwd	Displays current directory
quad	Numerical integration with adaptive Simpson’s rule
quadl	Numerical integration with adaptive Lobatto quadrature
quit	Stops MATLAB
r	red
rand	Generates uniformly distributed random numbers between 0 and 1
randn	Generates normally distributed random numbers
rank	Computes rank of a matrix
real(x)	Real part of a complex number x
refresh	Redraws current figure window
reshape	Change size
return	Return to the invoking function
rmfield	Removes a field from a structure array
roots	Computes polynomial roots
round	Rounds towards the nearest integer
rref	Computes reduced row echelon form
Sample Word 1	Sample Definition 1
save	Saves workspace variables in a file
sawtooth	Generates a periodic sawtooth input
script	Script M-files
sec(x)	Secant; sec(x)
sech(x)	Hyperbolic secant; 1/cosh(x)
semilogx	Creates semilog plot (logarithmic abscissa)
semilogy	Creates semilog plot (logarithmic ordinate)
set	Specifies properties of objects such as axes
setfield	Sets contents of field
sign	Signum function
simple	Searches for the shortest form of an expression
simplify	Simplifies an expression using Maple’s simplification rules
sin(x)	Sine; sin(x)
sinh(x)	Hyperbolic sine; sinh(x)
size	Computes array size
solve	Solves symbolic equations
sort	Sorts each column
spline	Cubic-spline interpolation
sqrt(x)	Square root; x
square	Generates a square wave input
stairs	Creates stairs pot
std	Calculates the standard deviation
stem	Creates stem plot
stepfun	Generates a step function input
strcmp	Compares strings
struct	Creates structure array
subplot	Creates plots in subwindows
subs	Substitutes variables or expressions
sum	Sums each column
surf	Creates shaded three-dimensional mesh surface plot
surfc	Same as surf with contour plot underneath
switch	Directs program execution by comparing point with case expressions
sym	Creates a symbolic variable
sym2poly	Converts an expression to a polynomial coefficient vector
syms	Creates one or more symbolic variables
symsum	Returns the symbolic summation of an expression
tan(x)	Tangent; tan(x)
tanh(x)	Hyperbolic tangent; sinh(x)/cosh(x)
taylor	Returns the Taylor series of a function
text	Places string in figure
tic, toc	Start, stop a stopwatch timer
title	Puts text at top of plot
trapz	Numerical integration with the trapezoidal rule
type	Displays contents of a file
unmkpp	Computes the coefficients of cubic-spine polynomials
v	triangle (down)
vpa	Sets the number of digits used to evaluate expressions
w	white
warning	Display a warning message
waterfall	Same as mesh with mesh lines in one direction
what	Lists all MATLAB files in the current directory
while	Repeats statements an indefinite number of times
who	Lists current variables
whos	Lists current variables (long display)
wklread	Reads .wk1 spreadsheet file
x	x-mark
xlabel	Adds text label to x-axis
xor	Logical operator: EXCLUSIVE OR
y	yellow
ylabel	Adds text label to y-axis
zeros	Creates an array of zeros
zlabel	Adds text label to z-axis

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