• MATLAB
• syntax
  • number
    • special variable
    • special constant
  • numerical operator
  • character syntax
    • semicolon ;
    • percentage sign %
  • save and load
• variable
  • assign
    • vector
    • matrix
      • solve $A\vec{x}=B$
  • variable management
  • session management
    • shell environment
    • file system
  • format format arg1
  • find help

MATLAB

syntax

number

special variable

• most recent answer ans
• accuracy of floating-point precision eps

special constant

• not a number Nan
• $\infty$ Inf
• $\sqrt{-1}$ i or j
• $\pi$ pi

numerical operator

• plus + minus -
• matrix multiplication *
• array multiplication .*
• matrix exponential ^
• array exponential .^
• left-division \
• array left-division .\
• right-division /
• array right-division ./
• square root sqrt()

character syntax

• regularly spaced elements or entire row or column :
• enclose function argument, array index; override precedence ()
• enclosure array element []
• decimal point .
• line-continuation ...
• separate statement and element in a row ,
• quote sign and transpose _
• non-conjugated transpose ._

semicolon ;

• end of statement
• hide output of statement

percentage sign %

• inline comment % comment
• multiline comment

% {
    comment
% }

save and load

• save all variable in workspace as .mat file save file_name
• load the file load file_name

variable

assign

• all variable is either array or matrix
• no null type
• unassigned value are assigned to ans
• long assignment

var1 = command1 ...
    command2

• declare global variable global

vector

1D array

• row vector [num1 …]
• column vector [row1;…]

matrix

2D array [r1c1 r1c2 …; r2c1 …]

solve $A\vec{x}=B$

x = A\B

variable management

• display all variable name who
  • with information whos
• delete all variable clear
  • delete variable var1 clear var1
• check existence of variable exist var1

session management

shell environment

• open shell matlab -nodisplay -nodesktop
• close shell quit or exit

file system

• shell script cd dir delete pwd

format format arg1

• short format (default, 4 decimal place) format short
• display 16 decimal place format long
• display 2 decimal place format bank
• display in exponential form format arg1 e
• display as the closest rational form format rat

find help

• help topic help
• search help entry lookfor