Matlab入门（英文）

晓夜寒风

Some MATLAB function descriptions
. Y' ^; W' Y; v( K! `These lists are copied from the help screens for MATLAB Version 4.2c (dated Nov 23 1994). Only a few of the summaries are listed -- use Matlab's help function to see more.

, A. u8 @2 z+ V- m>> help

晓夜寒风

HELP topics:

1 M+ E  D1 d3 h) i+ `matlab/general       -  General purpose commands.
matlab/ops           -  Operators and special characters.
matlab/lang          -  Language constructs and debugging.
matlab/elmat         -  Elementary matrices and matrix manipulation.
matlab/specmat       -  Specialized matrices.
matlab/elfun         -  Elementary math functions.
$ [6 A% e8 S! L( v- D: G5 Umatlab/specfun       -  Specialized math functions.
" C) H9 R3 E- L9 [0 O' Gmatlab/matfun        -  Matrix functions - numerical linear algebra.
# g; ^  b- J4 N) Nmatlab/datafun       -  Data analysis and Fourier transform functions.
matlab/polyfun       -  Polynomial and interpolation functions.
matlab/funfun        -  Function functions - nonlinear numerical methods.
( v5 V; n- h' z. _1 g' Ematlab/sparfun       -  Sparse matrix functions.
matlab/plotxy        -  Two dimensional graphics.
matlab/plotxyz       -  Three dimensional graphics.
matlab/graphics      -  General purpose graphics functions.
matlab/color         -  Color control and lighting model functions.
matlab/sounds        -  Sound processing functions.
matlab/strfun        -  Character string functions.
* y* u$ {. r0 D6 {" ~* gmatlab/iofun         -  Low-level file I/O functions.
matlab/demos         -  The MATLAB Expo and other demonstrations.
toolbox/chem         -  Chemometrics Toolbox
' ]5 R  G/ ]& A- ytoolbox/control      -  Control System Toolbox.
fdident/fdident      -  Frequency Domain System Identification Toolbox
0 d! A8 G8 Y. ^. y$ rfdident/fddemos      -  Demonstrations for the FDIDENT Toolbox
toolbox/hispec       -  Hi-Spec Toolbox
0 \# a+ \$ s  B9 U4 _toolbox/ident        -  System Identification Toolbox.
toolbox/images       -  Image Processing Toolbox.
toolbox/local        -  Local function library.
) ?6 Y4 A, o3 U  a) Itoolbox/mmle3        -  MMLE3 Identification Toolbox.
mpc/mpccmds          -  Model Predictive Control Toolbox
mpc/mpcdemos         -  Model Predictive Control Toolbox
mutools/commands     -  Mu-Analysis and Synthesis Toolbox.: Commands directory
mutools/subs         -  Mu-Analysis and Synthesis Toolbox -- Supplement
; _. C. Z5 D8 M- atoolbox/ncd          -  Nonlinear Control Design Toolbox.
nnet/nnet            -  Neural Network Toolbox.
nnet/nndemos         -  Neural Network Demonstrations and Applications.
8 T! {0 u& n8 Ztoolbox/optim        -  Optimization Toolbox.
toolbox/robust       -  Robust Control Toolbox.
toolbox/signal       -  Signal Processing Toolbox.
toolbox/splines      -  Spline Toolbox.
. `/ p0 }3 `7 }3 z, p4 o/ |! ktoolbox/stats        -  Statistics Toolbox.
toolbox/symbolic     -  Symbolic Math Toolbox.
6 K7 n* R$ f4 c; X: |" F& ctoolbox/wavbox       - (No table of contents file)
simulink/simulink    -  SIMULINK model analysis and construction functions.
& e# Z# u2 h8 p) G- s0 [simulink/blocks      -  SIMULINK block library.
, q% {9 h6 V3 T: I1 Y6 ]simulink/simdemos    -  SIMULINK demonstrations and samples.
/ ]. ~% S+ y! a" \- K; [% f* Gtoolbox/codegen      -  Real-Time Workshop

0 S0 A: H! Y  ^% I1 x! B/ k, L1 B; p* YFor more help on directory/topic, type "help topic".

晓夜寒风

>> help elmat

Elementary matrices and matrix manipulation.

: W/ s* W; C7 G Elementary matrices.
# c' j; w$ N6 D   zeros       - Zeros matrix.
% {0 B9 R% J! u' |5 L% U1 `: e   ones        - Ones matrix.
% z7 ]/ w1 r; h" ]   eye         - Identity matrix.
4 D6 m# a8 j( k2 x   rand        - Uniformly distributed random numbers.
9 V5 K6 w7 H$ ~% s2 S' Q) f   randn       - Normally distributed random numbers.
7 V- j, z  H; g! N4 m   linspace    - Linearly spaced vector.
: {2 c4 Q& b% x( s" n2 \' @   logspace    - Logarithmically spaced vector.
' [, H# m) G6 _8 Y0 Q* k9 V   meshgrid    - X and Y arrays for 3-D plots.
   :           - Regularly spaced vector.

) {( z: C% A& m, V( F Special variables and constants.
   ans         - Most recent answer.
+ P2 E( ?! M% p8 [" }7 j   eps         - Floating point relative accuracy.
' m" N' U. F0 G0 U) ^   realmax     - Largest floating point number.
+ R" _3 l8 B0 B2 J   realmin     - Smallest positive floating point number.
   pi          - 3.1415926535897....
& q* s$ \9 s* \   i, j        - Imaginary unit.
* c3 G( [2 a% T' d0 X   inf         - Infinity.
8 _% i* C, ~- f& H* Q" l   NaN         - Not-a-Number.
1 @  x- h( X7 T' _   flops       - Count of floating point operations.
% F$ e" Y$ S- }9 U& E2 y   nargin      - Number of function input arguments.
   nargout     - Number of function output arguments.
   computer    - Computer type.
8 v5 \/ P/ C) q; U. ~7 R   isieee      - True for computers with IEEE arithmetic.
   isstudent   - True for the Student Edition.
   why         - Succinct answer.
5 a& C5 f. K8 r   version     - MATLAB version number.
9 b; Z! T! D7 g* [
4 @. f- e2 w0 ?8 ~3 g& l Time and dates.
3 ?7 r- F! G5 q4 u+ x" j: a/ l   clock       - Wall clock.
% |0 ]5 N! v, b8 {   cputime     - Elapsed CPU time.
( ?' l& a0 z; M; P! B- H+ ]; A   date        - Calendar.
! o6 r3 h( K& ]- a7 u: J% t   etime       - Elapsed time function.
, L; j3 [! ^1 ~4 [   tic, toc    - Stopwatch timer functions.
$ m: P% Q( J# A; v. v$ P8 D
) S% |6 B8 L" q5 j' M Matrix manipulation.
   diag        - Create or extract diagonals.
   fliplr      - Flip matrix in the left/right direction.
7 l+ L0 P8 T" ?, g" Q   flipud      - Flip matrix in the up/down direction.
: H' c$ v- F+ d# `' Q8 W2 u+ s* N   reshape     - Change size.
   rot90       - Rotate matrix 90 degrees.
: m- _+ P3 k1 }, `# V+ b. F5 u+ G   tril        - Extract lower triangular part.
   triu        - Extract upper triangular part.
   :           - Index into matrix, rearrange matrix.

晓夜寒风

>> help specmat
% n! ^  l" L$ r1 D
Specialized matrices.
7 z6 w7 S* Q: b$ g
2 w) [1 {& s4 Y* a: c# Q5 S   compan      - Companion matrix.
( o4 W0 c2 X. O2 T   gallery     - Several small test matrices.
   hadamard    - Hadamard matrix.
, Z! O0 [, t' j) W   hankel      - Hankel matrix.
+ k+ D" ]; }$ i, ~5 l' n   hilb        - Hilbert matrix.
/ a8 y# [, m4 n   invhilb     - Inverse Hilbert matrix.
   kron        - Kronecker tensor product.
' }/ e0 R$ L( _, z7 ?+ W3 ^( O   magic       - Magic square.
   pascal      - Pascal matrix.
$ V* C8 D  W; @9 {* t   rosser      - Classic symmetric eigenvalue test problem.
   toeplitz    - Toeplitz matrix.
1 M6 d8 a; r3 Y* ]0 p3 u   vander      - Vandermonde matrix.
   wilkinson   - Wilkinson's eigenvalue test matrix.
% }( y( b) N9 g0 w
3 q# ^8 F) ]1 |* c1 S0 h$ z
>> help elfun
- j* g- u7 b2 M( ~6 o6 \5 g
Elementary math functions.

' L: N0 x7 t) M8 t( Y) z Trigonometric.
0 |- \, X7 Y+ {2 S- d5 n   sin         - Sine.
   sinh        - Hyperbolic sine.
   asin        - Inverse sine.
4 z9 B4 x, X' R& u, H- C   asinh       - Inverse hyperbolic sine.
4 v  G/ w) T3 ?1 H* P7 W' \   cos         - Cosine.
& x4 O7 \# ~/ ~$ s2 D+ ~   cosh        - Hyperbolic cosine.
   acos        - Inverse cosine.
, x/ `  `, F1 p$ }   acosh       - Inverse hyperbolic cosine.
   tan         - Tangent.
% G- F5 _/ x! i   tanh        - Hyperbolic tangent.
   atan        - Inverse tangent.
2 L; w; \3 k) i1 `- i3 X   atan2       - Four quadrant inverse tangent.
   atanh       - Inverse hyperbolic tangent.
   sec         - Secant.
   sech        - Hyperbolic secant.
$ K! n( b+ B+ z( |$ w& g   asec        - Inverse secant.
! a* D0 C- W9 L3 x3 X' c   asech       - Inverse hyperbolic secant.
   csc         - Cosecant.
6 x, G( \8 i4 e   csch        - Hyperbolic cosecant.
, {2 J7 @" e2 g, Y   acsc        - Inverse cosecant.
6 Q+ X) z- }; c8 i+ J( [) H   acsch       - Inverse hyperbolic cosecant.
9 s; |" T1 o3 w5 z- Y   cot         - Cotangent.
2 k, P8 @) A: q0 Q5 E) u2 p   coth        - Hyperbolic cotangent.
   acot        - Inverse cotangent.
   acoth       - Inverse hyperbolic cotangent.
1 I0 i, y$ c7 }; L
Exponential.
  k5 V! E* }3 q  u7 b" {9 D. [1 y   exp         - Exponential.
- S" P' W7 G/ Q   log         - Natural logarithm.
   log10       - Common logarithm.
   sqrt        - Square root.

5 a2 b$ b- l) K- Z7 p4 l Complex.
   abs         - Absolute value.
   angle       - Phase angle.
& {% W& T1 \- ]( W3 e   conj        - Complex conjugate.
6 q' @* P& E1 K9 r   imag        - Complex imaginary part.
5 T5 S' ?7 Q% f- W% N3 p5 b   real        - Complex real part.
* V6 j) o/ O' c/ E9 d- n
Numeric.
   fix         - Round towards zero.
0 t8 f0 `6 u* f! f8 Z* @0 j   floor       - Round towards minus infinity.
   ceil        - Round towards plus infinity.
   round       - Round towards nearest integer.
   rem         - Remainder after division.
   sign        - Signum function.
1 z/ s7 l* a( L. J+ i

>> help specfun

晓夜寒风

>> help specmat
, h; U8 I' c0 O* ?1 p+ g/ e
9 ^) }2 A5 k7 A- { Specialized matrices.
' b5 i/ S; E+ v% q. b# D! H
   compan      - Companion matrix.
% i1 W2 z! k8 i; p4 o   gallery     - Several small test matrices.
  s5 `2 l7 ?) I; ~   hadamard    - Hadamard matrix.
% ?1 [. J1 M: o- p   hankel      - Hankel matrix.
' I! v, W5 r( r) }   hilb        - Hilbert matrix.
   invhilb     - Inverse Hilbert matrix.
8 k! _1 D1 O" T, z# P8 c) w7 K  E   kron        - Kronecker tensor product.
4 p9 e8 t$ a* l% n9 k7 }" d   magic       - Magic square.
8 _; r) t4 y( s# D   pascal      - Pascal matrix.
* m7 m' B" k; @3 o   rosser      - Classic symmetric eigenvalue test problem.
( L  x% a, D+ x! d, ~4 x5 V( F   toeplitz    - Toeplitz matrix.
   vander      - Vandermonde matrix.
' n- s4 R1 f! |( Q0 p   wilkinson   - Wilkinson's eigenvalue test matrix.

2 V6 V8 M: ^$ Q; O: j
! ?5 L6 ?( z) v1 f>> help elfun

Elementary math functions.

+ g% P; A/ W9 Q Trigonometric.
   sin         - Sine.
% P$ u( }+ X" I) e# }/ a% a, d   sinh        - Hyperbolic sine.
' |) g! @, |4 e" G2 j* {   asin        - Inverse sine.
   asinh       - Inverse hyperbolic sine.
   cos         - Cosine.
3 X# \) C# P$ ~! p& N' S   cosh        - Hyperbolic cosine.
. {1 b2 [. v0 z: }# v, v   acos        - Inverse cosine.
   acosh       - Inverse hyperbolic cosine.
2 l' W) S! Q+ `7 ]* e% c   tan         - Tangent.
   tanh        - Hyperbolic tangent.
   atan        - Inverse tangent.
   atan2       - Four quadrant inverse tangent.
   atanh       - Inverse hyperbolic tangent.
- O* M. O! @: e  Z5 D   sec         - Secant.
8 c3 I; r( C/ s4 f* m4 P. C   sech        - Hyperbolic secant.
' n$ n4 Z4 K: Z+ V8 D( a   asec        - Inverse secant.
1 {: p# n7 w$ M4 k8 x0 O   asech       - Inverse hyperbolic secant.
   csc         - Cosecant.
   csch        - Hyperbolic cosecant.
% {8 |. ]/ |6 s, h# i) q   acsc        - Inverse cosecant.
   acsch       - Inverse hyperbolic cosecant.
   cot         - Cotangent.
   coth        - Hyperbolic cotangent.
' g& A% ]3 I2 u   acot        - Inverse cotangent.
$ Y/ F4 z- ?: |3 i1 N  {. ^" r   acoth       - Inverse hyperbolic cotangent.

! z+ \( v9 G( H$ j" z2 s0 \ Exponential.
# |" F1 F! q( W9 [9 ]; m# W4 N   exp         - Exponential.
; q( f3 e. b9 v7 u" T   log         - Natural logarithm.
   log10       - Common logarithm.
   sqrt        - Square root.

* |7 ?& Y# x3 g0 G1 n/ @& H Complex.
   abs         - Absolute value.
   angle       - Phase angle.
   conj        - Complex conjugate.
) l  R2 W7 P) U7 J( ~* T   imag        - Complex imaginary part.
   real        - Complex real part.

Numeric.
* {/ R: e9 n- |# t+ r, b. h( C   fix         - Round towards zero.
   floor       - Round towards minus infinity.
   ceil        - Round towards plus infinity.
, ?1 ~. q& B, x; V( Y# [   round       - Round towards nearest integer.
   rem         - Remainder after division.
   sign        - Signum function.

3 M% R3 G6 A+ _! P4 h
4 `5 R$ g+ @/ E2 B>> help specfun

晓夜寒风

Specialized math functions.
# L2 z# k& x( L+ Z' g% r
* P, `" y7 V: u( Y! n   besselj     - Bessel function of the first kind.
   bessely     - Bessel function of the second kind.
   besseli     - Modified Bessel function of the first kind.
( `! i3 h1 M/ L9 x5 C' S! k   besselk     - Modified Bessel function of the second kind.
   beta        - Beta function.
   betainc     - Incomplete beta function.
   betaln      - Logarithm of beta function.
  \* ?" G$ }" j- \; s   elli石皮解      - Jacobi elliptic functions.
   ellipke     - Complete elliptic integral.
   erf         - Error function.
   erfc        - Complementary error function.
8 P+ ]$ B1 o, T# `+ b2 A   erfcx       - Scaled complementary error function.
: m& @8 @% I9 l2 t5 |9 y  Y   erfinv      - Inverse error function.
, p+ v- ?: `$ F% o   expint      - Exponential integral function.
( y7 R6 P. }, y/ l8 h+ i: X   gamma       - Gamma function.
   gcd         - Greatest common divisor.
. z4 W0 ^8 F( f) F! e   gammainc    - Incomplete gamma function.
0 J8 K2 {/ K, ?0 G- L+ j5 f8 q   lcm         - Least common multiple.
# A& g  f0 w8 z) s0 b8 [  x   legendre    - Associated Legendre function.
5 Q) S; T; f/ Y   gammaln     - Logarithm of gamma function.
+ F. b/ J2 P& p  b6 n   log2        - Dissect floating point numbers.
   pow2        - Scale floating point numbers.
/ ?8 B, p7 F+ Z- z   rat         - Rational approximation.
   rats        - Rational output.
5 V$ v1 @# f+ J3 I4 F$ m. T7 h   cart2sph    - Transform from Cartesian to spherical coordinates.
   cart2pol    - Transform from Cartesian to polar coordinates.
   pol2cart    - Transform from polar to Cartesian coordinates.
   sph2cart    - Transform from spherical to Cartesian coordinates.

4 i/ }, S+ N0 [8 D; @! U0 B
>> help matfun

Matrix functions - numerical linear algebra.

' A$ n# A4 p! N: s/ e% M Matrix analysis.
   cond        - Matrix condition number.
   norm        - Matrix or vector norm.
5 r: a5 H( j9 V! A! ^- }; W3 V   rcond       - LINPACK reciprocal condition estimator.
" ]$ V) x! v* `   rank        - Number of linearly independent rows or columns.
   det         - Determinant.
   trace       - Sum of diagonal elements.
* D2 a# z+ `% d6 \   null        - Null space.
   orth        - Orthogonalization.
   rref        - Reduced row echelon form.
2 F, C; a1 Z1 g& N& \
( n( ]  w1 L# i Linear equations.
   \ and /     - Linear equation solution; use "help slash".
   chol        - Cholesky factorization.
% ?4 U. C* T( L. X, y5 I) Z( R   lu          - Factors from Gaussian elimination.
   inv         - Matrix inverse.
   qr          - Orthogonal-triangular decomposition.
4 }; N* O. L( \# l% J* i6 ?8 C2 e   qrdelete    - Delete a column from the QR factorization.
5 l. r$ I/ ^  |$ t, M5 p$ r/ l   qrinsert    - Insert a column in the QR factorization.
/ T4 G+ y: `" i+ D. {4 c, R   nnls        - Non-negative least-squares.
   pinv        - Pseudoinverse.
: W2 w: I- p6 V* u/ ^+ l! M   lscov       - Least squares in the presence of known covariance.
: \( U) I: ]' Z; r
Eigenvalues and singular values.
. W/ ~& y, v5 L   eig         - Eigenvalues and eigenvectors.
' l3 {  X) E$ I/ N/ U   poly        - Characteristic polynomial.
$ Z1 \, _4 \' w5 J   polyeig     - Polynomial eigenvalue problem.
   hess        - Hessenberg form.
   qz          - Generalized eigenvalues.
" b6 p8 z( `  v' y( B5 H3 D   rsf2csf     - Real block diagonal form to complex diagonal form.
   cdf2rdf     - Complex diagonal form to real block diagonal form.
: }4 |: W: [2 A) |   schur       - Schur decomposition.
6 f2 f# ~$ a7 }4 m  I. v5 C3 X2 H   balance     - Diagonal scaling to improve eigenvalue accuracy.
   svd         - Singular value decomposition.

- W# f, x  a0 \! m Matrix functions.
+ @" J4 n  Z0 }) f% p. J( g5 g   expm        - Matrix exponential.
$ b7 {4 i' L4 `! u) }   expm1       - M-file implementation of expm.
# B, }. t' i% ]8 S) ?) v1 D   expm2       - Matrix exponential via Taylor series.
: C1 h/ c; b7 m- y   expm3       - Matrix exponential via eigenvalues and eigenvectors.
   logm        - Matrix logarithm.
   sqrtm       - Matrix square root.
   funm        - Evaluate general matrix function.

晓夜寒风

>> help general
$ Z5 l. @* \6 Q7 d: {+ y/ t& V
/ n. o2 t: c, l# w! T: S General purpose commands.
MATLAB Toolbox  Version 4.2a 25-Jul-94
9 E/ q$ a) B7 K  ~
Managing commands and functions.
0 I% k9 w3 _5 h( I   help        - On-line documentation.
, j) I! S& B: e3 I: k   doc         - Load hypertext documentation.
   what        - Directory listing of M-, MAT- and MEX-files.
   type        - List M-file.
; H6 }9 P  u+ p* t2 [   lookfor     - Keyword search through the HELP entries.
: r) d+ l: X) l4 b- |# O3 U) t- I   which       - Locate functions and files.
) p' N( x/ H! z# ^4 ?   demo        - Run demos.
$ G& @1 S$ H1 J# S   path        - Control MATLAB's search path.

4 M; U1 [7 x. r" {8 I0 r Managing variables and the workspace.
   who         - List current variables.
   whos        - List current variables, long form.
   load        - Retrieve variables from disk.
   save        - Save workspace variables to disk.
   clear       - Clear variables and functions from memory.
   pack        - Consolidate workspace memory.
! e# n; D) t& B0 D   size        - Size of matrix.
; k0 {$ x* b4 G8 i& ^( b   length      - Length of vector.
7 j! V- I3 |8 v7 e9 C& v" f1 U   disp        - Display matrix or text.

( r. H/ }$ Q, D4 q Working with files and the operating system.
   cd          - Change current working directory.
/ `8 v1 n& M: A( i   dir         - Directory listing.
   delete      - Delete file.
2 f: [( d" S0 ?6 e: q( I4 H   getenv      - Get environment value.
   !           - Execute operating system command.
# X8 M" W9 T3 l. O- Q' x# V   unix        - Execute operating system command & return result.
   diary       - Save text of MATLAB session.
) k+ v& Z5 J  V: I" d" R& a
: _3 {: p% V; {; ?" A- j1 t/ e Controlling the command window.
( h' w0 }2 }0 C, r- r8 j& U   cedit       - Set command line edit/recall facility parameters.
   clc         - Clear command window.
9 A. I, O  q4 M6 m- N% @+ S0 d   home        - Send cursor home.
   format      - Set output format.
   echo        - Echo commands inside script files.
   more        - Control paged output in command window.
: y2 P1 Z, I0 L1 I* _2 ?
! @' }/ N: y# M9 H8 _ Starting and quitting from MATLAB.
   quit        - Terminate MATLAB.
8 a: \+ X  U& p* y; g   startup     - M-file executed when MATLAB is invoked.
   matlabrc    - Master startup M-file.
0 D; E3 v" w$ e$ G9 d& i1 u
General information.
% L0 G+ i8 {* G  W   info        - Information about MATLAB and The MathWorks, Inc.
5 F* `. {9 F9 B$ J& `3 D" \+ P   subscribe   - Become subscribing user of MATLAB.
' \) i% }4 m8 E- E3 }   hostid      - MATLAB server host identification number.
   whatsnew    - Information about new features not yet documented.
   ver         - MATLAB, SIMULINK, and TOOLBOX version information.

晓夜寒风

>> help general

General purpose commands.
! a9 }3 R1 Q  I  G MATLAB Toolbox  Version 4.2a 25-Jul-94

+ S5 N) L" k7 c  e* M Managing commands and functions.
  @' p, B/ U( q9 H- t   help        - On-line documentation.
, w2 _8 \$ q6 c0 M5 u* C   doc         - Load hypertext documentation.
   what        - Directory listing of M-, MAT- and MEX-files.
- @( a% E5 F7 X& V8 l: g   type        - List M-file.
& _4 J4 l9 G, r8 t; d8 ?( w! b   lookfor     - Keyword search through the HELP entries.
   which       - Locate functions and files.
% A: a6 i! L5 s; e# a" D   demo        - Run demos.
" F* N7 b3 W" O" v8 {  e   path        - Control MATLAB's search path.
* c* |4 ]6 e$ b2 d9 r  v& _
) Z: Z" D# i* k& E4 J, Y Managing variables and the workspace.
0 A3 e, V$ U/ H   who         - List current variables.
   whos        - List current variables, long form.
   load        - Retrieve variables from disk.
$ D6 C0 I( o' h6 B* |   save        - Save workspace variables to disk.
   clear       - Clear variables and functions from memory.
$ O0 R8 c) o6 d8 s8 }   pack        - Consolidate workspace memory.
  S; V% y3 D- [& o: |2 ]+ ?   size        - Size of matrix.
; ~$ n4 ^! a  ?1 |   length      - Length of vector.
8 X' Q& x1 @3 h   disp        - Display matrix or text.

) l7 N0 Z8 R+ y! D, f' m Working with files and the operating system.
4 U% P; q+ c; v# ]) @' m   cd          - Change current working directory.
3 [, r( N7 ~! P" B* e7 O   dir         - Directory listing.
   delete      - Delete file.
   getenv      - Get environment value.
6 ]" s6 w! ?& F; V2 _5 P) x+ V   !           - Execute operating system command.
" m% f& r. d2 o2 a6 {: P   unix        - Execute operating system command & return result.
   diary       - Save text of MATLAB session.

Controlling the command window.
   cedit       - Set command line edit/recall facility parameters.
$ R+ L, ~0 V4 I! f, I   clc         - Clear command window.
   home        - Send cursor home.
   format      - Set output format.
* u8 \, k# \# E5 Q# x$ r   echo        - Echo commands inside script files.
   more        - Control paged output in command window.

Starting and quitting from MATLAB.
5 Z  Z- u5 A( P) y& i4 y; d( V   quit        - Terminate MATLAB.
   startup     - M-file executed when MATLAB is invoked.
   matlabrc    - Master startup M-file.
3 `' t$ L5 d; v3 s
% j. O  a( g- g6 V  c General information.
   info        - Information about MATLAB and The MathWorks, Inc.
   subscribe   - Become subscribing user of MATLAB.
6 \6 V6 E! ]0 Z  o; l5 u+ c- [- c   hostid      - MATLAB server host identification number.
$ s$ K# h  H9 I; q: D1 Z) v   whatsnew    - Information about new features not yet documented.
   ver         - MATLAB, SIMULINK, and TOOLBOX version information.

晓夜寒风

>> help funfun
5 [1 U0 I0 b( ^
1 {! {# b3 w5 L+ Z1 }; B Function functions - nonlinear numerical methods.

   ode23       - Solve differential equations, low order method.
   ode23p      - Solve and plot solutions.
   ode45       - Solve differential equations, high order method.
   quad        - Numerically evaluate integral, low order method.
5 ]* s9 `7 T; Y, f) Z) `   quad8       - Numerically evaluate integral, high order method.
   fmin        - Minimize function of one variable.
   fmins       - Minimize function of several variables.
, o/ _! m3 y4 k& f( l, A9 c. c   fzero       - Find zero of function of one variable.
   fplot       - Plot function.

8 v% U2 a2 S4 w+ M, d" ~ See also The Optimization Toolbox, which has a comprehensive
% f5 x' @, r* x. l. d5 m set of function functions for optimizing and minimizing functions.

晓夜寒风

>> help funfun
/ R: I) L  X2 L  S% w9 q6 y3 }
" d2 z" U& F9 q. s! g  } Function functions - nonlinear numerical methods.

2 P) n0 r' h: C   ode23       - Solve differential equations, low order method.
   ode23p      - Solve and plot solutions.
   ode45       - Solve differential equations, high order method.
   quad        - Numerically evaluate integral, low order method.
   quad8       - Numerically evaluate integral, high order method.
) B9 j$ x+ Q8 B! Q; N   fmin        - Minimize function of one variable.
3 Z2 m, Y  }1 C; I   fmins       - Minimize function of several variables.
   fzero       - Find zero of function of one variable.
/ O; c' X4 ]/ J) q' v* `% D3 l+ t   fplot       - Plot function.

  m( R' y+ I3 ]5 r' Q( v See also The Optimization Toolbox, which has a comprehensive
+ H+ K6 @9 `; `! p. S; {1 \ set of function functions for optimizing and minimizing functions.