Matlab入门（英文）

晓夜寒风

Some MATLAB function descriptions
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.

>> help

晓夜寒风

HELP topics:

% h' ]" c3 `: |! r* g  v' nmatlab/general       -  General purpose commands.
matlab/ops           -  Operators and special characters.
matlab/lang          -  Language constructs and debugging.
% Q9 U$ }! O& S2 ?& Bmatlab/elmat         -  Elementary matrices and matrix manipulation.
) [; b* \- ]" ~) H: mmatlab/specmat       -  Specialized matrices.
matlab/elfun         -  Elementary math functions.
matlab/specfun       -  Specialized math functions.
+ O3 _* R9 ^% {& X( I5 D* mmatlab/matfun        -  Matrix functions - numerical linear algebra.
matlab/datafun       -  Data analysis and Fourier transform functions.
matlab/polyfun       -  Polynomial and interpolation functions.
% u7 z( x) Q( G& Z- q0 }4 fmatlab/funfun        -  Function functions - nonlinear numerical methods.
matlab/sparfun       -  Sparse matrix functions.
matlab/plotxy        -  Two dimensional graphics.
* {4 \+ ~+ M4 F) G7 E7 n# \, Ymatlab/plotxyz       -  Three dimensional graphics.
0 D* t7 r/ L4 d0 Nmatlab/graphics      -  General purpose graphics functions.
matlab/color         -  Color control and lighting model functions.
+ G' \* x, c4 d% V4 t- ymatlab/sounds        -  Sound processing functions.
4 e1 N: I0 `% e4 f+ bmatlab/strfun        -  Character string functions.
matlab/iofun         -  Low-level file I/O functions.
matlab/demos         -  The MATLAB Expo and other demonstrations.
0 d1 L5 o. v; [" ^. _6 ^toolbox/chem         -  Chemometrics Toolbox
toolbox/control      -  Control System Toolbox.
fdident/fdident      -  Frequency Domain System Identification Toolbox
fdident/fddemos      -  Demonstrations for the FDIDENT Toolbox
toolbox/hispec       -  Hi-Spec Toolbox
toolbox/ident        -  System Identification Toolbox.
toolbox/images       -  Image Processing Toolbox.
toolbox/local        -  Local function library.
" A4 X) `' c1 v1 i8 R. ttoolbox/mmle3        -  MMLE3 Identification Toolbox.
mpc/mpccmds          -  Model Predictive Control Toolbox
mpc/mpcdemos         -  Model Predictive Control Toolbox
1 ]% t, I# O* r8 v$ L& jmutools/commands     -  Mu-Analysis and Synthesis Toolbox.: Commands directory
6 D% `; |) o9 x# nmutools/subs         -  Mu-Analysis and Synthesis Toolbox -- Supplement
toolbox/ncd          -  Nonlinear Control Design Toolbox.
; g9 d! B( z2 d( J6 ^nnet/nnet            -  Neural Network Toolbox.
nnet/nndemos         -  Neural Network Demonstrations and Applications.
toolbox/optim        -  Optimization Toolbox.
- e5 H0 V! \1 ~- etoolbox/robust       -  Robust Control Toolbox.
toolbox/signal       -  Signal Processing Toolbox.
" W& G! t" ~4 ?toolbox/splines      -  Spline Toolbox.
" R, ^; q! P3 T3 s  v5 X$ Vtoolbox/stats        -  Statistics Toolbox.
toolbox/symbolic     -  Symbolic Math Toolbox.
6 a- c7 n9 y" ]( a7 F3 S- Rtoolbox/wavbox       - (No table of contents file)
. e# r- x) q. ?* ~4 t' @7 Lsimulink/simulink    -  SIMULINK model analysis and construction functions.
* I5 P) z' e2 k" j2 wsimulink/blocks      -  SIMULINK block library.
  u( H5 |. q4 x7 Psimulink/simdemos    -  SIMULINK demonstrations and samples.
% ~8 O2 Q9 Q+ F* q" y* g( gtoolbox/codegen      -  Real-Time Workshop

2 I1 Z, V& b6 }3 V+ V8 N- D# Y  RFor more help on directory/topic, type "help topic".

晓夜寒风

>> help elmat
' q- H  }3 E4 V7 f* ^7 ?
3 i: n+ D+ N5 Y' v, d" x/ f$ a  } Elementary matrices and matrix manipulation.

Elementary matrices.
   zeros       - Zeros matrix.
" ^; V/ c0 P; r6 T+ k/ m" T   ones        - Ones matrix.
   eye         - Identity matrix.
   rand        - Uniformly distributed random numbers.
  |9 p8 b% |& [6 C, L   randn       - Normally distributed random numbers.
   linspace    - Linearly spaced vector.
& e* `1 P0 v6 u0 k   logspace    - Logarithmically spaced vector.
   meshgrid    - X and Y arrays for 3-D plots.
0 _1 ?7 v' r* e4 c; n+ h$ y   :           - Regularly spaced vector.

Special variables and constants.
   ans         - Most recent answer.
   eps         - Floating point relative accuracy.
   realmax     - Largest floating point number.
# Q3 {# s- C/ l9 R% N2 Q8 F! p  E3 g   realmin     - Smallest positive floating point number.
   pi          - 3.1415926535897....
  s) l$ r$ n: r1 X# G9 F6 o   i, j        - Imaginary unit.
2 m6 ]+ p' O' U6 {2 s   inf         - Infinity.
6 c; m: G4 z8 Y   NaN         - Not-a-Number.
# n7 o1 f5 Z# H5 ]# m" I! N   flops       - Count of floating point operations.
   nargin      - Number of function input arguments.
( E; l4 p. O+ t1 `/ Q7 d" G2 ]+ `: ^   nargout     - Number of function output arguments.
! X2 C& |/ s( b9 k   computer    - Computer type.
   isieee      - True for computers with IEEE arithmetic.
% o3 ^; y1 W6 y- t- D. {2 g   isstudent   - True for the Student Edition.
   why         - Succinct answer.
   version     - MATLAB version number.
3 H7 S+ l7 g- u* L& ?  |) m! \
( w8 [% p3 H; H  L Time and dates.
   clock       - Wall clock.
   cputime     - Elapsed CPU time.
   date        - Calendar.
1 l+ B* ?; S/ @6 f! @& E, s9 P   etime       - Elapsed time function.
" \9 K1 E6 ^1 N; h   tic, toc    - Stopwatch timer functions.

: s/ s5 b. M3 F+ a4 { Matrix manipulation.
# f; h; \4 J  F( \/ z& T5 Z3 b9 {   diag        - Create or extract diagonals.
( Q, @9 V5 H5 D( h# M" S" b8 A   fliplr      - Flip matrix in the left/right direction.
9 L7 @- c: c7 n, o% \   flipud      - Flip matrix in the up/down direction.
) B2 z, q, u+ T   reshape     - Change size.
   rot90       - Rotate matrix 90 degrees.
   tril        - Extract lower triangular part.
6 z: T& e! o8 W5 Q   triu        - Extract upper triangular part.
   :           - Index into matrix, rearrange matrix.

晓夜寒风

>> help specmat
/ w7 X: ~3 q5 D3 i+ |
Specialized matrices.
2 z! J& F1 ~; N7 i9 \  i
   compan      - Companion matrix.
   gallery     - Several small test matrices.
   hadamard    - Hadamard matrix.
- E" U  b6 W8 g, R. J8 Q: g   hankel      - Hankel matrix.
   hilb        - Hilbert matrix.
   invhilb     - Inverse Hilbert matrix.
$ A; y: X2 ~' ~  J4 Y   kron        - Kronecker tensor product.
   magic       - Magic square.
% l1 I: T: ?5 b# K3 u0 X* s   pascal      - Pascal matrix.
! g7 I6 i; a) z  ?  F! B, P   rosser      - Classic symmetric eigenvalue test problem.
   toeplitz    - Toeplitz matrix.
) J) x5 n* W& x; Z   vander      - Vandermonde matrix.
# c6 E: k  w% C% n' Z$ a' ?4 i+ S   wilkinson   - Wilkinson's eigenvalue test matrix.
4 z8 l/ |* H7 i# Z* e

>> help elfun

+ {) P; c; E2 u" S' H Elementary math functions.

Trigonometric.
! B3 a2 B% N; k0 D. D" F   sin         - Sine.
   sinh        - Hyperbolic sine.
- H, M2 X$ V* U$ H3 [4 h   asin        - Inverse sine.
+ h8 ]- `; e7 o1 g8 k. @8 |   asinh       - Inverse hyperbolic sine.
   cos         - Cosine.
   cosh        - Hyperbolic cosine.
   acos        - Inverse cosine.
   acosh       - Inverse hyperbolic cosine.
  R& B# [, j# p4 _$ S   tan         - Tangent.
   tanh        - Hyperbolic tangent.
1 u# I  ]9 |# R! i* U: w   atan        - Inverse tangent.
   atan2       - Four quadrant inverse tangent.
+ e* y: x  I2 ^' M9 v+ C+ k% X   atanh       - Inverse hyperbolic tangent.
   sec         - Secant.
" n6 p& B0 C; n  @- d" G9 e   sech        - Hyperbolic secant.
/ |$ k/ r# F: i  Z+ R   asec        - Inverse secant.
   asech       - Inverse hyperbolic secant.
   csc         - Cosecant.
. s/ @, l# b, `& d9 _  o7 E   csch        - Hyperbolic cosecant.
   acsc        - Inverse cosecant.
   acsch       - Inverse hyperbolic cosecant.
8 M) U7 A: h, }* |& P% Z   cot         - Cotangent.
   coth        - Hyperbolic cotangent.
   acot        - Inverse cotangent.
   acoth       - Inverse hyperbolic cotangent.
5 l( [! Q8 T  G; }1 c) w! @9 y- Y
2 S, B, F0 }1 d. o# G0 t8 _ Exponential.
   exp         - Exponential.
   log         - Natural logarithm.
/ {  h) F7 O& L% l) C# O+ _/ T   log10       - Common logarithm.
   sqrt        - Square root.

  j6 m5 o/ W8 X! C1 M. V Complex.
3 ~- Z1 y/ K0 O! u   abs         - Absolute value.
9 z& f9 Z& W5 P7 u* C0 V! Z   angle       - Phase angle.
4 V9 c/ Q8 w$ Y- l" k- \/ R   conj        - Complex conjugate.
   imag        - Complex imaginary part.
   real        - Complex real part.
; z, t! T- f- }0 C
% N" H- J4 k- j# ` Numeric.
   fix         - Round towards zero.
7 X0 [0 Q, i) c2 k) K$ J) D   floor       - Round towards minus infinity.
   ceil        - Round towards plus infinity.
   round       - Round towards nearest integer.
   rem         - Remainder after division.
   sign        - Signum function.
/ `& K7 j" x1 [( E
' E1 }( T1 ^) l
' {8 C9 C  Q, a" r7 N>> help specfun

晓夜寒风

>> help specmat
6 f0 G; U$ \& h; N
$ N  G) D1 g# }/ I3 N Specialized matrices.
4 ^. k+ _- j8 `6 d$ t. V5 @$ ~) P1 ~. r
   compan      - Companion matrix.
% h* l( I' T3 V8 ]   gallery     - Several small test matrices.
9 I% B) q* d9 n8 K   hadamard    - Hadamard matrix.
1 C. J5 C/ V6 I/ d   hankel      - Hankel matrix.
- R! Y. V/ k' L# x   hilb        - Hilbert matrix.
   invhilb     - Inverse Hilbert matrix.
   kron        - Kronecker tensor product.
+ d" D: k( t9 D+ ]5 O1 ]" G   magic       - Magic square.
   pascal      - Pascal matrix.
' k6 c& f  j& E2 r& N   rosser      - Classic symmetric eigenvalue test problem.
   toeplitz    - Toeplitz matrix.
! T% j' Q* u* K# o; z   vander      - Vandermonde matrix.
4 E4 B" T/ e- s0 [( A, W   wilkinson   - Wilkinson's eigenvalue test matrix.


>> help elfun
6 j* m+ v* j* I8 ~8 U8 d- R
% I; W' C- J# V5 ~ Elementary math functions.

" H7 N! a' Y+ r; k& g Trigonometric.
( d' `, H% S+ X, ?' S! B" ?0 J   sin         - Sine.
! w: z9 s- A$ X* B  K4 L7 u   sinh        - Hyperbolic sine.
   asin        - Inverse sine.
   asinh       - Inverse hyperbolic sine.
   cos         - Cosine.
  {8 S0 R* `( H% B   cosh        - Hyperbolic cosine.
   acos        - Inverse cosine.
; U! W' }; B9 K+ K! f$ }0 M! A   acosh       - Inverse hyperbolic cosine.
9 T; x* q% ^5 g6 y; n! I' B; p2 M; G   tan         - Tangent.
   tanh        - Hyperbolic tangent.
$ z% A+ K. q: h) w- W) q   atan        - Inverse tangent.
1 T5 a$ m: T" ~, h4 ~   atan2       - Four quadrant inverse tangent.
( A9 Y( E* _1 ^   atanh       - Inverse hyperbolic tangent.
6 d. D% S  |2 o* [, o& q' y   sec         - Secant.
   sech        - Hyperbolic secant.
   asec        - Inverse secant.
   asech       - Inverse hyperbolic secant.
   csc         - Cosecant.
   csch        - Hyperbolic cosecant.
   acsc        - Inverse cosecant.
2 ]* [3 v+ g9 i$ M4 _8 q   acsch       - Inverse hyperbolic cosecant.
4 f9 z" P/ _7 v   cot         - Cotangent.
   coth        - Hyperbolic cotangent.
   acot        - Inverse cotangent.
   acoth       - Inverse hyperbolic cotangent.
3 p5 o$ I/ C3 V8 @4 i, e
- s# D, {# @1 d$ A Exponential.
   exp         - Exponential.
8 a! h* Y  p+ n, D3 {, D* ~   log         - Natural logarithm.
( u% r* ?4 Q* n   log10       - Common logarithm.
   sqrt        - Square root.
: R3 z! l- g+ p: L
Complex.
3 h8 G& f# Y2 V& _4 N' S7 ^( P   abs         - Absolute value.
   angle       - Phase angle.
   conj        - Complex conjugate.
3 @; b3 h$ z# a4 V: |   imag        - Complex imaginary part.
   real        - Complex real part.

, ^, `2 ~( k% |+ Q5 ?) a" x" V Numeric.
0 C# c% ?; a6 v" K" I# p   fix         - Round towards zero.
8 Z6 s7 ?% Z' W7 h. B7 Z   floor       - Round towards minus infinity.
, \. N! j: f: j3 v3 J   ceil        - Round towards plus infinity.
& O/ R+ o) A/ E/ u   round       - Round towards nearest integer.
   rem         - Remainder after division.
. U1 [* f& ]8 ~, P: t: k' O   sign        - Signum function.
) L8 x' [8 I( ~* c

9 b6 ^1 r. A- {( L  e& U4 `>> help specfun

晓夜寒风

Specialized math functions.
' d. X; ?- W7 j" G6 W& u' b- H
   besselj     - Bessel function of the first kind.
   bessely     - Bessel function of the second kind.
   besseli     - Modified Bessel function of the first kind.
   besselk     - Modified Bessel function of the second kind.
7 s1 i  c, i! \1 _   beta        - Beta function.
3 T. a; h6 ]1 V. X; c. v   betainc     - Incomplete beta function.
   betaln      - Logarithm of beta function.
0 t% B+ @1 a) g) j: Z   elli石皮解      - Jacobi elliptic functions.
: {! S: [9 |2 l) K6 q/ N   ellipke     - Complete elliptic integral.
* v  f% a* h) F! g   erf         - Error function.
; ?! u1 m+ l# V/ r) z, s   erfc        - Complementary error function.
   erfcx       - Scaled complementary error function.
( b4 {% M; z9 m3 W   erfinv      - Inverse error function.
   expint      - Exponential integral function.
5 Y2 h) w) W2 x+ g+ N: d   gamma       - Gamma function.
   gcd         - Greatest common divisor.
   gammainc    - Incomplete gamma function.
* S9 z' d+ Y* i1 ?. i) ~% V( K   lcm         - Least common multiple.
   legendre    - Associated Legendre function.
   gammaln     - Logarithm of gamma function.
0 W# ^) b" i1 E7 Y; N' r   log2        - Dissect floating point numbers.
2 X) i2 m+ b6 v0 q/ @/ ]$ u   pow2        - Scale floating point numbers.
   rat         - Rational approximation.
4 i$ l3 T# x5 [; c1 e   rats        - Rational output.
" E2 f; P2 l8 Q- \; z   cart2sph    - Transform from Cartesian to spherical coordinates.
# T, F8 t7 K+ C8 b: c$ a6 y5 Z   cart2pol    - Transform from Cartesian to polar coordinates.
   pol2cart    - Transform from polar to Cartesian coordinates.
$ n# I! L% @$ j( L   sph2cart    - Transform from spherical to Cartesian coordinates.
/ I- l+ P' |2 P7 I: }4 K
# X3 J2 M3 G/ ^+ l( a, }5 S" t
>> help matfun

Matrix functions - numerical linear algebra.
6 p9 M( K! \6 m# N6 j: h. \8 U
& F( D3 i* Y2 H. e Matrix analysis.
+ C: j" m" q, r   cond        - Matrix condition number.
# B0 ~( L& [8 W- m   norm        - Matrix or vector norm.
   rcond       - LINPACK reciprocal condition estimator.
   rank        - Number of linearly independent rows or columns.
   det         - Determinant.
1 g& e4 a0 T3 p+ y, X$ z   trace       - Sum of diagonal elements.
   null        - Null space.
% D/ _: u% V1 b9 K. R1 I   orth        - Orthogonalization.
   rref        - Reduced row echelon form.
$ |* ~3 N/ H( S
. G: g8 v$ T7 q& `5 T Linear equations.
8 ^  P9 _; m! H" j3 r0 F. X$ f   \ and /     - Linear equation solution; use "help slash".
7 f! G, S! P3 G   chol        - Cholesky factorization.
2 ~+ }/ \% c8 B8 @$ ^% c; n$ Z   lu          - Factors from Gaussian elimination.
" E* ?; ]  d7 D! j+ `* p# K" n   inv         - Matrix inverse.
3 Y6 s- M- u/ Z: x. k* n# E   qr          - Orthogonal-triangular decomposition.
/ P2 ?$ H- ?( ?2 b$ @( J   qrdelete    - Delete a column from the QR factorization.
+ _$ b( R9 L+ n   qrinsert    - Insert a column in the QR factorization.
   nnls        - Non-negative least-squares.
   pinv        - Pseudoinverse.
   lscov       - Least squares in the presence of known covariance.

Eigenvalues and singular values.
/ o) r4 A, G6 i  O3 j   eig         - Eigenvalues and eigenvectors.
3 c% H7 k7 ]) x$ E$ \   poly        - Characteristic polynomial.
   polyeig     - Polynomial eigenvalue problem.
7 |3 \# b8 L, k/ U) V) ~   hess        - Hessenberg form.
   qz          - Generalized eigenvalues.
$ i8 l% h, x1 i   rsf2csf     - Real block diagonal form to complex diagonal form.
$ T/ S) W" U/ o1 m8 v   cdf2rdf     - Complex diagonal form to real block diagonal form.
   schur       - Schur decomposition.
   balance     - Diagonal scaling to improve eigenvalue accuracy.
   svd         - Singular value decomposition.
# C9 a$ l2 K9 \7 f; `7 Z/ {
% y: c7 B9 @" T; `$ G Matrix functions.
   expm        - Matrix exponential.
) S* {5 y4 S+ q; q) x% U# U   expm1       - M-file implementation of expm.
   expm2       - Matrix exponential via Taylor series.
% P& a, F9 f  W   expm3       - Matrix exponential via eigenvalues and eigenvectors.
# @, O. F1 d( a   logm        - Matrix logarithm.
: ?3 V# H3 u& W# g5 l; o7 N   sqrtm       - Matrix square root.
' b. t: ?$ d( Y7 w) m8 h   funm        - Evaluate general matrix function.

晓夜寒风

>> help general
: o/ z4 V1 k+ F/ ^5 ~4 V
+ M  m& z' G! u: c" t" C4 i General purpose commands.
2 t4 W5 I- Q' Z6 u5 [8 T7 J) B MATLAB Toolbox  Version 4.2a 25-Jul-94
" E4 F. H2 @5 N" |6 ^3 `. A
Managing commands and functions.
5 d2 h( M7 ]( a- k$ P  l' [   help        - On-line documentation.
   doc         - Load hypertext documentation.
! n  c1 @. k$ e; V7 t6 E   what        - Directory listing of M-, MAT- and MEX-files.
   type        - List M-file.
   lookfor     - Keyword search through the HELP entries.
) k/ T5 ^5 S4 w' l   which       - Locate functions and files.
& A9 P& R3 `# X" S   demo        - Run demos.
   path        - Control MATLAB's search path.

' ]5 n3 r  P3 Q& a Managing variables and the workspace.
' v! F: t5 B/ h: R" f# Z6 r8 T   who         - List current variables.
   whos        - List current variables, long form.
  j# d0 U' \. s' [' I   load        - Retrieve variables from disk.
   save        - Save workspace variables to disk.
   clear       - Clear variables and functions from memory.
   pack        - Consolidate workspace memory.
   size        - Size of matrix.
8 Y: W  t! f1 U6 S7 J   length      - Length of vector.
* `2 |  }$ m) g6 O   disp        - Display matrix or text.

  b" o  W- D& N) E" O# `6 l8 ~* I Working with files and the operating system.
- _# K& g- E3 [7 c3 u   cd          - Change current working directory.
  L0 Y) `* \" I+ K   dir         - Directory listing.
4 ?  h& S" K  O2 i; Q. f   delete      - Delete file.
! k7 i4 q/ X- G- z5 o$ I% N! @$ D   getenv      - Get environment value.
3 T. B' }) j/ p0 `+ l; K! e- U) N6 ?   !           - Execute operating system command.
   unix        - Execute operating system command & return result.
   diary       - Save text of MATLAB session.

Controlling the command window.
3 n# `& C/ w# k, A7 t: x' p   cedit       - Set command line edit/recall facility parameters.
   clc         - Clear command window.
   home        - Send cursor home.
   format      - Set output format.
   echo        - Echo commands inside script files.
   more        - Control paged output in command window.
/ Q3 [% B- d0 T, `9 L5 l# o
Starting and quitting from MATLAB.
( d8 {: \& v1 d% b   quit        - Terminate MATLAB.
   startup     - M-file executed when MATLAB is invoked.
% d) O6 L3 t: F; m0 p   matlabrc    - Master startup M-file.

General information.
! M$ l, t& D+ i0 z& m  p8 k: d   info        - Information about MATLAB and The MathWorks, Inc.
+ ^7 X% d. E4 e; w6 p2 ~+ ~   subscribe   - Become subscribing user of MATLAB.
0 e, l6 H4 d2 O6 U+ Z' }+ `   hostid      - MATLAB server host identification number.
# b8 D7 M1 f* @   whatsnew    - Information about new features not yet documented.
   ver         - MATLAB, SIMULINK, and TOOLBOX version information.

晓夜寒风

>> help general
; n4 ~6 b' y9 N" i4 s7 P0 E* }( |
General purpose commands.
* s1 t( }' `5 t8 }) ` MATLAB Toolbox  Version 4.2a 25-Jul-94
  m! p* |$ @& q4 E& }7 d
Managing commands and functions.
   help        - On-line documentation.
   doc         - Load hypertext documentation.
   what        - Directory listing of M-, MAT- and MEX-files.
   type        - List M-file.
   lookfor     - Keyword search through the HELP entries.
7 V3 \% h. p1 l" p& R" P& a+ S- [   which       - Locate functions and files.
2 I' d+ l. {& V$ O. u- J   demo        - Run demos.
   path        - Control MATLAB's search path.

Managing variables and the workspace.
6 t* v1 y6 C: k3 ?   who         - List current variables.
. C+ n# [3 C! ]$ v% [$ v3 q  }   whos        - List current variables, long form.
% X, U* S- S% c3 f/ @* R, k8 x   load        - Retrieve variables from disk.
   save        - Save workspace variables to disk.
   clear       - Clear variables and functions from memory.
, j. v) K& K3 k, @% J6 H" e" Q0 W! W   pack        - Consolidate workspace memory.
   size        - Size of matrix.
7 ]. u. E. s( l' H( i- z5 _   length      - Length of vector.
( N% h  s- m* g3 p7 w; I   disp        - Display matrix or text.
* u- G- j8 m$ b+ [% }9 q
1 s& R$ M, Y' X8 Z" @* T Working with files and the operating system.
   cd          - Change current working directory.
   dir         - Directory listing.
   delete      - Delete file.
   getenv      - Get environment value.
   !           - Execute operating system command.
  l7 z" `8 a' h; j# [   unix        - Execute operating system command & return result.
: B, e' v) I; l6 j; X   diary       - Save text of MATLAB session.
' ^: r1 l: a" c6 U1 E0 P
/ }; u3 O2 i: [6 t Controlling the command window.
   cedit       - Set command line edit/recall facility parameters.
   clc         - Clear command window.
   home        - Send cursor home.
& ^/ v# K+ c# @   format      - Set output format.
   echo        - Echo commands inside script files.
  U5 K( d2 \, c  J" n6 G   more        - Control paged output in command window.
) T5 d  y" L: ]. S! K' k4 i
Starting and quitting from MATLAB.
/ F0 w! ~0 @& S7 i- F   quit        - Terminate MATLAB.
$ k4 |" b* l4 L1 R$ N( x   startup     - M-file executed when MATLAB is invoked.
   matlabrc    - Master startup M-file.
: L+ |7 p( g: I1 i
General information.
   info        - Information about MATLAB and The MathWorks, Inc.
   subscribe   - Become subscribing user of MATLAB.
  u8 O- R; u2 H# D4 |: e) I; ]   hostid      - MATLAB server host identification number.
+ K  \# ]9 \  n  u2 r  X7 r3 [$ T* p   whatsnew    - Information about new features not yet documented.
" A" m) h* h3 ^( s) X# H   ver         - MATLAB, SIMULINK, and TOOLBOX version information.

晓夜寒风

>> help funfun
+ @1 |9 L' `' m; j+ U" @0 T) ~
Function functions - nonlinear numerical methods.
8 U# z) G  E5 _7 P' K2 r6 Q% k3 i: F4 X! q
- z6 h3 u3 i% v; s& g   ode23       - Solve differential equations, low order method.
6 y( N* n8 j" z7 w" m" f   ode23p      - Solve and plot solutions.
   ode45       - Solve differential equations, high order method.
8 G7 v( k/ i4 N& F' s   quad        - Numerically evaluate integral, low order method.
- V$ c- {0 p2 t6 U   quad8       - Numerically evaluate integral, high order method.
$ U6 G, _+ w0 [$ i5 H   fmin        - Minimize function of one variable.
* a7 Q+ N8 w! b5 @   fmins       - Minimize function of several variables.
   fzero       - Find zero of function of one variable.
   fplot       - Plot function.

See also The Optimization Toolbox, which has a comprehensive
5 P4 O8 u. O( v set of function functions for optimizing and minimizing functions.

晓夜寒风

>> help funfun
+ ~: q" s  y  h0 `& Q
4 C! N" M2 F3 h. h9 L) H* C4 r6 I Function functions - nonlinear numerical methods.
3 t% H/ b" H% I! t
   ode23       - Solve differential equations, low order method.
% Z$ w1 [& u) c  |2 ]7 d8 Z& e   ode23p      - Solve and plot solutions.
- s: ]. A. Y/ H) r3 G* f6 c3 f   ode45       - Solve differential equations, high order method.
7 L2 B. C: J/ @, G$ s) V   quad        - Numerically evaluate integral, low order method.
3 E* w  P7 d/ |, T! q( r   quad8       - Numerically evaluate integral, high order method.
   fmin        - Minimize function of one variable.
) R" Q& t5 i* J2 @& L   fmins       - Minimize function of several variables.
   fzero       - Find zero of function of one variable.
   fplot       - Plot function.
( q4 u: j& N/ J9 J
. h8 j% |1 A/ o: N8 c( P! \ See also The Optimization Toolbox, which has a comprehensive
set of function functions for optimizing and minimizing functions.