MATLAB

Matlab Basics

Matlab Array

Matlab Types

Matlab Function

Matlab Functions List
Matlab Functions List

Rmk

~~Only functions referenced in my notes are listed.~~

Functions without a dedicated note are those that

have a single syntax with nothing else worth saying,

duplicate the usage of another function, or

are rarely used

For these, only the most basic syntax is kept.

Symbols

... denotes variable-length argument omission

__ repeats the preceding syntax

<> marks an optional argument with a default value

<[]> means the brackets [] may be omitted, i.e. the argument may be either a variable-length list or an array

Basics

save, load

exist

iskeyword

clear

isequal

Array Related

linspace

logspace

isempty

isscalar

isvector

issparse

Graphics Related

fplot

Mathematics

Matlab Random Number Generation

round(a): nearest integer to a; break ties by rounding away from zero

fix(a): nearest integer to a toward $0$

floor(a): nearest integer to a toward $- \infty$

ceil(a): nearest integer to a toward $+ \infty$

real(z): real part of complex number z

imag(z): imaginary part of complex number z

abs(z): absolute or modulus

angle(z): phase angle in radians, in the range $(- π, π]$

conj(z): conjugate of complex number z

complex(a,b): complex number with real part a and imaginary part b

Matrix Manipulation

Matlab Function - spdiags

Data Type Construction

struct

Identity Test

Any function that starts with is returns a logical value indicating whether the tested variable satisfies a certain condition

Without special comment, the syntax is iscond(a), which returns 1 if the condition cond is satisfied by variable a, and 0 otherwise

isa(var,type) tests if var is of type type

isnumeric

isfloat

isstruct

islogical

ischar

iscell

iscellstr tests if input is a cell array of strings

isnan

isinf

isfinite

isinteger

isreal

isscalar

isvector

issparse

isspace

isempty

isdir

iskeyword

isvarname tests if the input is a valid variable name

isglobal

ismember(var,set) tests if var is a member of set

isequal(a,b,...) tests if all inputs are equal

isequalwithequalnans(a,b,...) tests if all inputs are equal, treating NaN values as equal

issorted

isfield(struct,field) tests if struct has a field named field

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Matlab Operations

Matlab Operator
Operator

Arithmetic Operations

Relational Operations

Logical Operations

String and Character Formatting

Other

Operator Precedence

Matlab Arithmetic Operations

Symbol Role
+ Addition; Unary plus
- Subtraction; Unary minus
.* Element-wise multiplication
* Matrix multiplication
./ Element-wise right division
/ Matrix right division
.\ Element-wise left division
\ Matrix left division (also known as backslash)
.^ Element-wise power
^ Matrix power
.' Transpose
' Complex conjugate transpose

Matlab Relational Operations

Symbol Role
== Equal to
~= Not equal to
> Greater than
>= Greater than or equal to
< Less than
<= Less than or equal to

Matlab Logical Operations

Symbol Role
& Find logical AND
&& Find logical AND (with short-circuiting)
~ Find logical NOT

String and Character Formatting

Symbol Effect on Text
'' Single quotation mark
“ Cell delimiter
%{ %} Block comments that extend beyond one line
! Operating system command
? Metaclass for MATLAB class
~ Argument placeholder to suppress specific input or output arguments
< & Specify superclasses
.? Specify fields of name-value structure when using function argument validation

Operator Precedence

()

~, sign +, -

^, .^, transpose ', .'

.*, *, ./, /, .\, \

+, -

:

<, <=, ==, >=, >, ~=

&

|

&&

||

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Matlab Control Statements

Matlab Math

Matlab Graphics

Other