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 $(-\pi ,\pi ]$
• 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