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:
* q' D5 _. r  p& a
8 J+ {7 `' E9 Qmatlab/general       -  General purpose commands.
0 ~+ ?8 W: p( Z. b9 V* c1 z) X0 jmatlab/ops           -  Operators and special characters.
" {7 N# t0 Z! v- qmatlab/lang          -  Language constructs and debugging.
matlab/elmat         -  Elementary matrices and matrix manipulation.
; W' `& h7 C8 ?# k* ^( omatlab/specmat       -  Specialized matrices.
matlab/elfun         -  Elementary math functions.
matlab/specfun       -  Specialized math functions.
( N3 B1 ]1 I  f! H! O- n7 Kmatlab/matfun        -  Matrix functions - numerical linear algebra.
matlab/datafun       -  Data analysis and Fourier transform functions.
2 X& L8 g0 J8 F# m( \  amatlab/polyfun       -  Polynomial and interpolation functions.
+ n; t; V7 M% \/ z: e6 Y4 fmatlab/funfun        -  Function functions - nonlinear numerical methods.
matlab/sparfun       -  Sparse matrix functions.
matlab/plotxy        -  Two dimensional graphics.
matlab/plotxyz       -  Three dimensional graphics.
matlab/graphics      -  General purpose graphics functions.
# X' p4 t0 d( B! y6 K* @matlab/color         -  Color control and lighting model functions.
matlab/sounds        -  Sound processing functions.
matlab/strfun        -  Character string functions.
! i8 X$ l  u2 [/ p7 bmatlab/iofun         -  Low-level file I/O functions.
matlab/demos         -  The MATLAB Expo and other demonstrations.
toolbox/chem         -  Chemometrics Toolbox
toolbox/control      -  Control System Toolbox.
2 D5 c. S6 Z: ?, u. y/ G& P3 l9 `fdident/fdident      -  Frequency Domain System Identification Toolbox
fdident/fddemos      -  Demonstrations for the FDIDENT Toolbox
8 ?, I; G) `4 X% X% n6 Ctoolbox/hispec       -  Hi-Spec Toolbox
9 W$ L8 C/ n8 Xtoolbox/ident        -  System Identification Toolbox.
& T* r" H9 L! e! N; p* _: F: m( Dtoolbox/images       -  Image Processing Toolbox.
% M$ E% f/ w- T4 E" a2 stoolbox/local        -  Local function library.
" {* m: V2 x- W4 [% i: V2 Btoolbox/mmle3        -  MMLE3 Identification Toolbox.
! D) F! e0 o3 gmpc/mpccmds          -  Model Predictive Control Toolbox
, ?  d: s6 ?; F0 S0 p1 v! N' [mpc/mpcdemos         -  Model Predictive Control Toolbox
! i  R: u+ k! ^1 T( h. rmutools/commands     -  Mu-Analysis and Synthesis Toolbox.: Commands directory
mutools/subs         -  Mu-Analysis and Synthesis Toolbox -- Supplement
' q) O: M! H2 L& s1 W$ G8 }3 Y$ g- `# m5 Dtoolbox/ncd          -  Nonlinear Control Design Toolbox.
# q" }) A' J/ [2 g/ Rnnet/nnet            -  Neural Network Toolbox.
- B. C# t9 j) h6 snnet/nndemos         -  Neural Network Demonstrations and Applications.
/ P* J0 z3 W. ]3 F  e" E  Wtoolbox/optim        -  Optimization Toolbox.
toolbox/robust       -  Robust Control Toolbox.
toolbox/signal       -  Signal Processing Toolbox.
# B3 j' f) T9 O4 C* t2 J! ftoolbox/splines      -  Spline Toolbox.
. R8 g9 M3 X1 ^% Etoolbox/stats        -  Statistics Toolbox.
1 i! i# Q" \) c5 f( q8 Y1 B$ Ltoolbox/symbolic     -  Symbolic Math Toolbox.
7 I/ I1 H4 h' s' `2 }. J' V- Rtoolbox/wavbox       - (No table of contents file)
% D) F5 U( Y8 l9 isimulink/simulink    -  SIMULINK model analysis and construction functions.
simulink/blocks      -  SIMULINK block library.
3 s- Y' `1 U; B$ Bsimulink/simdemos    -  SIMULINK demonstrations and samples.
toolbox/codegen      -  Real-Time Workshop

For more help on directory/topic, type "help topic".

晓夜寒风

>> help elmat

' x8 s" b7 }/ w9 \' g$ x* y Elementary matrices and matrix manipulation.
% `3 {  v* ~/ e* e# e
! F9 C4 G4 \7 ?9 V# t Elementary matrices.
   zeros       - Zeros matrix.
   ones        - Ones matrix.
7 A- I! I7 K4 B   eye         - Identity matrix.
   rand        - Uniformly distributed random numbers.
   randn       - Normally distributed random numbers.
   linspace    - Linearly spaced vector.
6 g# p9 L& x8 L3 n2 \; _0 U   logspace    - Logarithmically spaced vector.
   meshgrid    - X and Y arrays for 3-D plots.
   :           - Regularly spaced vector.

8 k& F0 T  k9 R2 B& K Special variables and constants.
! t1 G2 Q1 Y7 _! i   ans         - Most recent answer.
" u3 j- \( o1 p/ f7 [   eps         - Floating point relative accuracy.
' ^: @8 q) m6 A/ g% o# ^   realmax     - Largest floating point number.
9 _6 T# X1 K; L  l$ ?1 Q8 N   realmin     - Smallest positive floating point number.
+ L0 H, e* ]- a- n/ {" ]   pi          - 3.1415926535897....
   i, j        - Imaginary unit.
0 Q# e/ N& g  H" @9 |$ H* v& N. H   inf         - Infinity.
/ i* E0 @& K: k   NaN         - Not-a-Number.
1 I( M0 `- Q' w) s4 ?0 P' y   flops       - Count of floating point operations.
5 e0 A0 J, P# i2 a   nargin      - Number of function input arguments.
   nargout     - Number of function output arguments.
   computer    - Computer type.
   isieee      - True for computers with IEEE arithmetic.
   isstudent   - True for the Student Edition.
. @, W- O+ o/ F* x! ]5 e! R% u. [   why         - Succinct answer.
   version     - MATLAB version number.

Time and dates.
   clock       - Wall clock.
   cputime     - Elapsed CPU time.
* R- m" S/ T% C0 d7 q   date        - Calendar.
+ V6 F" D5 C  d+ e3 }" d5 s   etime       - Elapsed time function.
   tic, toc    - Stopwatch timer functions.
) |8 s1 a0 ]0 F. E
Matrix manipulation.
   diag        - Create or extract diagonals.
   fliplr      - Flip matrix in the left/right direction.
   flipud      - Flip matrix in the up/down direction.
3 q" P  p  S- N: I( Y4 @   reshape     - Change size.
' P0 N" F2 B* y: _9 w, H   rot90       - Rotate matrix 90 degrees.
. ^& P9 c5 x# M! [5 w   tril        - Extract lower triangular part.
   triu        - Extract upper triangular part.
   :           - Index into matrix, rearrange matrix.

晓夜寒风

>> help specmat
5 ?% ^8 r' D2 ~8 @4 }
' m2 f, c: b8 l9 o% a Specialized matrices.

   compan      - Companion matrix.
   gallery     - Several small test matrices.
   hadamard    - Hadamard matrix.
1 ?0 C( f2 @, A2 y/ R5 S9 B   hankel      - Hankel matrix.
) d- k: Y# f$ }( Q   hilb        - Hilbert matrix.
   invhilb     - Inverse Hilbert matrix.
   kron        - Kronecker tensor product.
6 G4 l/ H+ q, l6 `   magic       - Magic square.
8 p" x* E- T/ N) T   pascal      - Pascal matrix.
   rosser      - Classic symmetric eigenvalue test problem.
   toeplitz    - Toeplitz matrix.
3 p& y+ q  I$ G4 M   vander      - Vandermonde matrix.
( h6 j+ q% t/ g1 @   wilkinson   - Wilkinson's eigenvalue test matrix.


>> help elfun

Elementary math functions.

- j. w" U0 O1 Z: x, `* b Trigonometric.
# x( @3 U5 v5 m, Z9 m! p   sin         - Sine.
   sinh        - Hyperbolic sine.
. d- _/ e% t" E2 M  O4 q   asin        - Inverse sine.
7 @3 A9 W- g8 n. q6 g9 d: z% u* t   asinh       - Inverse hyperbolic sine.
/ {2 x' e" n, A4 K# _   cos         - Cosine.
   cosh        - Hyperbolic cosine.
+ V8 A2 y- h( i& R   acos        - Inverse cosine.
   acosh       - Inverse hyperbolic cosine.
/ _8 `8 o# J# C, \6 G. M: f7 N# l   tan         - Tangent.
9 I; K+ N6 L, l: H; ~/ E   tanh        - Hyperbolic tangent.
0 M/ p8 x- w( p# Y   atan        - Inverse tangent.
   atan2       - Four quadrant inverse tangent.
' \1 r& G/ ~7 H' q, A   atanh       - Inverse hyperbolic tangent.
, l6 M0 Z1 H1 F5 U  ?   sec         - Secant.
  u, u$ ~# Q$ K+ L/ P* x   sech        - Hyperbolic secant.
: z9 w2 n7 J8 ^   asec        - Inverse secant.
+ T1 w# @. z% T: c' c- N   asech       - Inverse hyperbolic secant.
   csc         - Cosecant.
  F0 A' V$ Y* ]5 u$ E   csch        - Hyperbolic cosecant.
1 F9 U& N% X; `   acsc        - Inverse cosecant.
/ G, ~; n! H8 {   acsch       - Inverse hyperbolic cosecant.
   cot         - Cotangent.
   coth        - Hyperbolic cotangent.
   acot        - Inverse cotangent.
. X7 s* j4 D* \: @0 e   acoth       - Inverse hyperbolic cotangent.
' r  W9 r( `/ [: o2 J. S0 `
$ b- X' I6 g/ \+ Q) |# i# K Exponential.
( u8 l! M6 a8 }. W& i   exp         - Exponential.
   log         - Natural logarithm.
% r! B% ^5 v: H/ a   log10       - Common logarithm.
2 w6 O9 @0 q, L, g, L4 q   sqrt        - Square root.
: [$ q& Q7 o' i, X, j: g  e
4 y# x- \  q3 E4 c; w% U9 g Complex.
   abs         - Absolute value.
4 o0 W1 y' @# Z/ q   angle       - Phase angle.
   conj        - Complex conjugate.
   imag        - Complex imaginary part.
   real        - Complex real part.
, g7 b$ s% _# r: |4 S
+ I/ h3 i6 d( F Numeric.
   fix         - Round towards zero.
   floor       - Round towards minus infinity.
. }  n" J$ l; h, h4 s   ceil        - Round towards plus infinity.
   round       - Round towards nearest integer.
   rem         - Remainder after division.
% c- Q" N- _2 l3 e! [: Z5 X/ F   sign        - Signum function.
% u( ?# X. Y" F% P: N6 y

3 P8 I5 T- ]/ p  M) f>> help specfun

晓夜寒风

>> help specmat

* ^2 z( s1 U5 O  |' b5 k# ^( ~: ?- N Specialized matrices.
+ s* k& D0 Y% k) j; s
   compan      - Companion matrix.
   gallery     - Several small test matrices.
   hadamard    - Hadamard matrix.
1 U' U1 L0 S; m# \   hankel      - Hankel matrix.
   hilb        - Hilbert matrix.
   invhilb     - Inverse Hilbert matrix.
3 y3 F9 U0 K- A2 l  a: O; G   kron        - Kronecker tensor product.
7 m: C# ], I- Q; L   magic       - Magic square.
. |# i6 c3 n% v6 T1 F7 k   pascal      - Pascal matrix.
$ k) m- m# `5 ^   rosser      - Classic symmetric eigenvalue test problem.
   toeplitz    - Toeplitz matrix.
* j1 H% f3 a. g! d; L' f   vander      - Vandermonde matrix.
   wilkinson   - Wilkinson's eigenvalue test matrix.

0 Q8 M* h6 ]: s, L% _
' @/ Z# ~+ e, y4 e5 `* ?>> help elfun

Elementary math functions.
( P( Z2 X5 e: s7 P
. j9 {7 R7 O0 E. f9 | Trigonometric.
% f3 G; t: b. t- Z5 @2 a0 \9 ]  @   sin         - Sine.
   sinh        - Hyperbolic sine.
) `) @4 e0 f  M2 w& |   asin        - Inverse sine.
- l% e) R$ i) S0 _3 [% W% X' _   asinh       - Inverse hyperbolic sine.
   cos         - Cosine.
   cosh        - Hyperbolic cosine.
, D  t0 Q0 L4 f' W/ F   acos        - Inverse cosine.
   acosh       - Inverse hyperbolic cosine.
$ S4 u. V- R! V   tan         - Tangent.
5 D& a) T) i( ]   tanh        - Hyperbolic tangent.
   atan        - Inverse tangent.
   atan2       - Four quadrant inverse tangent.
) _$ s- J$ V( u, [2 Z$ n   atanh       - Inverse hyperbolic tangent.
   sec         - Secant.
- W0 z: \9 s+ L  k0 h   sech        - Hyperbolic secant.
   asec        - Inverse secant.
6 \- k2 C& C/ ^7 V& p   asech       - Inverse hyperbolic secant.
   csc         - Cosecant.
- |; o% X6 L- f6 H   csch        - Hyperbolic cosecant.
   acsc        - Inverse cosecant.
   acsch       - Inverse hyperbolic cosecant.
! a$ m8 W9 c) A4 O- e   cot         - Cotangent.
   coth        - Hyperbolic cotangent.
   acot        - Inverse cotangent.
   acoth       - Inverse hyperbolic cotangent.
0 v3 y% X0 ^* }2 i6 V8 k
6 Y0 z0 [4 C5 e- L& N) q# ? Exponential.
   exp         - Exponential.
   log         - Natural logarithm.
& S  \* |: o4 A- g) h3 ^9 ?. z   log10       - Common logarithm.
   sqrt        - Square root.

2 E4 L7 l" C2 \: W1 ?9 N Complex.
   abs         - Absolute value.
: m; Y4 V, w2 `( y  X3 J0 |0 u2 L   angle       - Phase angle.
   conj        - Complex conjugate.
   imag        - Complex imaginary part.
  I- D2 B+ n0 k; ?* p! i   real        - Complex real part.
8 `/ z& @: N: g0 ^' ~7 L% R% T) M9 k2 x
Numeric.
( j' N3 I, j2 ?0 G, a   fix         - Round towards zero.
) r1 t1 H- h2 B   floor       - Round towards minus infinity.
) x' Z: V5 o& E) e0 r   ceil        - Round towards plus infinity.
: R" t9 s! U; l' A9 J   round       - Round towards nearest integer.
   rem         - Remainder after division.
0 t% G- J6 m- D2 ~4 Y( r" \) u1 P( [4 ]   sign        - Signum function.
9 a* `; _9 V; ]

>> help specfun

晓夜寒风

Specialized math functions.

2 D1 w* ?7 Q& v8 H# B" K   besselj     - Bessel function of the first kind.
) {& N! ^( V) x   bessely     - Bessel function of the second kind.
+ }2 V* o  y4 Q( q7 \   besseli     - Modified Bessel function of the first kind.
   besselk     - Modified Bessel function of the second kind.
   beta        - Beta function.
   betainc     - Incomplete beta function.
& n- `  o- x2 [/ d. ]/ O% O   betaln      - Logarithm of beta function.
   elli石皮解      - Jacobi elliptic functions.
. v1 d3 w8 z0 E! J1 d   ellipke     - Complete elliptic integral.
   erf         - Error function.
' {) D" f3 }! @+ z5 R   erfc        - Complementary error function.
3 B7 P1 T7 {2 B$ n( Z. N8 B' J   erfcx       - Scaled complementary error function.
1 O1 z/ |9 D; G. I5 c   erfinv      - Inverse error function.
   expint      - Exponential integral function.
5 U8 Y& Q. k- o# }+ `- n   gamma       - Gamma function.
   gcd         - Greatest common divisor.
: U/ l5 e% `+ n: Z& {8 h7 ?2 ~   gammainc    - Incomplete gamma function.
   lcm         - Least common multiple.
   legendre    - Associated Legendre function.
. [8 c* K; g9 z) W1 y( |$ t   gammaln     - Logarithm of gamma function.
   log2        - Dissect floating point numbers.
, C6 I! Q5 ~) |* z' |7 W4 E   pow2        - Scale floating point numbers.
! f" ]# q( h( _1 T# [   rat         - Rational approximation.
   rats        - Rational output.
5 q. N) [5 c; @% f   cart2sph    - Transform from Cartesian to spherical coordinates.
" L$ T8 Y4 `& a& z6 g1 d" B   cart2pol    - Transform from Cartesian to polar coordinates.
" O1 M1 t* N- L) M! l1 y   pol2cart    - Transform from polar to Cartesian coordinates.
   sph2cart    - Transform from spherical to Cartesian coordinates.


. l# Y/ O3 R; q$ U( w( Z& W# b>> help matfun
: ?7 x8 X' }5 H8 T  h. ^0 \
. }- |- M7 c6 H+ _ Matrix functions - numerical linear algebra.
$ {1 J) x4 T5 O/ V* _
Matrix analysis.
   cond        - Matrix condition number.
   norm        - Matrix or vector norm.
   rcond       - LINPACK reciprocal condition estimator.
   rank        - Number of linearly independent rows or columns.
. p$ A" i' I- v1 S% f$ H& o   det         - Determinant.
% N+ o8 \% G( J* C! c   trace       - Sum of diagonal elements.
5 e3 h) R% U' G! n   null        - Null space.
# E& l7 n4 L# q" s   orth        - Orthogonalization.
; m. v6 w( }. E3 e/ e) C/ l7 Q   rref        - Reduced row echelon form.

- K/ N. w) Y. h9 p Linear equations.
+ n+ k% |- z  o   \ and /     - Linear equation solution; use "help slash".
( b0 L' z3 V) u* p7 s+ v$ G   chol        - Cholesky factorization.
   lu          - Factors from Gaussian elimination.
   inv         - Matrix inverse.
6 k0 F7 v5 t) I/ I   qr          - Orthogonal-triangular decomposition.
   qrdelete    - Delete a column from the QR factorization.
   qrinsert    - Insert a column in the QR factorization.
   nnls        - Non-negative least-squares.
   pinv        - Pseudoinverse.
7 _: w9 F) i6 g# Z0 e. \   lscov       - Least squares in the presence of known covariance.

& U: U) g: W, T$ B. H Eigenvalues and singular values.
' F) o( c7 |9 _2 e4 [7 t9 m   eig         - Eigenvalues and eigenvectors.
   poly        - Characteristic polynomial.
' a& S" c6 |# }. e2 V3 a$ K1 x& p   polyeig     - Polynomial eigenvalue problem.
5 O) m/ R1 X" S: z( u8 m+ s   hess        - Hessenberg form.
   qz          - Generalized eigenvalues.
4 R$ \# j" l% E3 Z! P* _* h   rsf2csf     - Real block diagonal form to complex diagonal form.
/ C4 Q; [) B# ?* o   cdf2rdf     - Complex diagonal form to real block diagonal form.
4 Z5 ]2 c  Q, `, j/ |8 @! I   schur       - Schur decomposition.
   balance     - Diagonal scaling to improve eigenvalue accuracy.
0 n4 \" X! d) j) g1 k  @   svd         - Singular value decomposition.
% m2 a) f: g3 [& f# I! a8 ~
5 l! |5 o( l# K) t% I& Q Matrix functions.
   expm        - Matrix exponential.
   expm1       - M-file implementation of expm.
   expm2       - Matrix exponential via Taylor series.
3 s- W% l5 J' [+ r: \7 u   expm3       - Matrix exponential via eigenvalues and eigenvectors.
9 i6 r$ d+ f; s8 U: X   logm        - Matrix logarithm.
7 O, O9 x- p# X6 b! Y1 o4 z   sqrtm       - Matrix square root.
   funm        - Evaluate general matrix function.

晓夜寒风

>> help general
: Q' T- f- s: b: J; _
General purpose commands.
MATLAB Toolbox  Version 4.2a 25-Jul-94
, K* W/ y2 s6 Z2 R/ d. d" F
1 j# ]: y7 T2 V/ \+ M+ A" \ Managing commands and functions.
4 x& M) p. R# U5 B   help        - On-line documentation.
+ `% M1 k. P! l1 T$ K! F   doc         - Load hypertext documentation.
. v  {- s- L" S9 X8 j! A   what        - Directory listing of M-, MAT- and MEX-files.
   type        - List M-file.
* p$ V: \% P9 M9 g   lookfor     - Keyword search through the HELP entries.
   which       - Locate functions and files.
2 }2 {4 x0 W& t! ^2 J* n$ p6 H   demo        - Run demos.
   path        - Control MATLAB's search path.

Managing variables and the workspace.
+ |4 N" W' z* O% h  x) e' X   who         - List current variables.
1 H+ ]2 y& ~' c& r2 W" Q- n" {   whos        - List current variables, long form.
   load        - Retrieve variables from disk.
% f  j4 a% a7 }7 L' Z* Q/ ?/ J   save        - Save workspace variables to disk.
   clear       - Clear variables and functions from memory.
1 j' E' |$ D0 [   pack        - Consolidate workspace memory.
   size        - Size of matrix.
. [; {( q) r2 L2 o   length      - Length of vector.
  {4 {* [  f( K- Y4 V+ x   disp        - Display matrix or text.
7 T6 N# K* y& t, ^: J! U
Working with files and the operating system.
$ j/ x7 X2 \, k: J- t  ]6 m   cd          - Change current working directory.
   dir         - Directory listing.
" ~" E4 M1 i( i* j( \5 _   delete      - Delete file.
0 O2 s- y  ~. a/ Y, L2 y1 H   getenv      - Get environment value.
   !           - Execute operating system command.
; }3 b  \# a7 z6 N   unix        - Execute operating system command & return result.
   diary       - Save text of MATLAB session.

& D) D9 i" U+ E+ W5 \ Controlling the command window.
) e: i7 w7 S! S; c3 |6 K& ]% j   cedit       - Set command line edit/recall facility parameters.
   clc         - Clear command window.
   home        - Send cursor home.
   format      - Set output format.
; l) G* ~0 z+ Y$ {$ F5 X. O! q9 x   echo        - Echo commands inside script files.
   more        - Control paged output in command window.
4 T  ~3 S. [5 O/ ?0 ?
Starting and quitting from MATLAB.
   quit        - Terminate MATLAB.
   startup     - M-file executed when MATLAB is invoked.
   matlabrc    - Master startup M-file.

6 Q. H; ^/ Q$ O General information.
' ]1 i7 ?* _0 D* O* @, N1 V   info        - Information about MATLAB and The MathWorks, Inc.
   subscribe   - Become subscribing user of MATLAB.
/ A0 k% L# k* G% S   hostid      - MATLAB server host identification number.
   whatsnew    - Information about new features not yet documented.
6 ?9 d; l# x' D4 W% Q, ~# Y   ver         - MATLAB, SIMULINK, and TOOLBOX version information.

晓夜寒风

>> help general

. l' o2 v& d$ ~6 {# k% B General purpose commands.
5 B1 G) N+ }) d4 b$ F7 Q. ^  k0 U  F MATLAB Toolbox  Version 4.2a 25-Jul-94

Managing commands and functions.
& L" m) o9 t& }. ?7 m! W8 r8 S   help        - On-line documentation.
2 B$ m# @' I* G0 F. v' x1 A   doc         - Load hypertext documentation.
" G, D* F9 Z- l   what        - Directory listing of M-, MAT- and MEX-files.
   type        - List M-file.
8 h7 E7 s0 i: v. D. T$ g- Z   lookfor     - Keyword search through the HELP entries.
, ?* Y, ]7 k) g4 K: p1 r/ ~   which       - Locate functions and files.
   demo        - Run demos.
   path        - Control MATLAB's search path.

Managing variables and the workspace.
* g# M6 _. v6 F. n   who         - List current variables.
- e4 ]( K! w# T' {" W! K   whos        - List current variables, long form.
   load        - Retrieve variables from disk.
   save        - Save workspace variables to disk.
% z/ s2 C  \3 r9 D: a$ L   clear       - Clear variables and functions from memory.
   pack        - Consolidate workspace memory.
9 ^3 h% M# V; |! I- L' Q' Z+ m  O   size        - Size of matrix.
$ a' L6 w3 W* s1 g   length      - Length of vector.
   disp        - Display matrix or text.

* I- Z8 F3 F, y* j8 {$ U$ g3 p Working with files and the operating system.
   cd          - Change current working directory.
   dir         - Directory listing.
/ r+ e6 S3 k0 J" A   delete      - Delete file.
8 R0 h3 d4 U- P! H# N   getenv      - Get environment value.
   !           - Execute operating system command.
* V& O  B+ V$ T  I5 T   unix        - Execute operating system command & return result.
8 W/ [; N2 B# P) b/ p7 Q( R7 ~   diary       - Save text of MATLAB session.

Controlling the command window.
9 O  g; q( \0 J! v   cedit       - Set command line edit/recall facility parameters.
   clc         - Clear command window.
# E; D1 a6 N2 f5 H: J( l   home        - Send cursor home.
   format      - Set output format.
   echo        - Echo commands inside script files.
   more        - Control paged output in command window.
5 X% Q; Y+ D( C, @& h2 D4 _
  P) _4 B0 e6 A) \- ~9 Z Starting and quitting from MATLAB.
   quit        - Terminate MATLAB.
   startup     - M-file executed when MATLAB is invoked.
2 O, Q+ |" f! ]  }. d   matlabrc    - Master startup M-file.

6 {: W  ?, t% `6 | General information.
   info        - Information about MATLAB and The MathWorks, Inc.
& ?9 s6 T$ c4 Z   subscribe   - Become subscribing user of MATLAB.
   hostid      - MATLAB server host identification number.
0 i6 F) Q# F1 }# @4 n   whatsnew    - Information about new features not yet documented.
   ver         - MATLAB, SIMULINK, and TOOLBOX version information.

晓夜寒风

>> help funfun
' g9 \' g3 J4 i
4 R  G* W+ \: ~2 j Function functions - nonlinear numerical methods.
" Z- h9 I5 \5 _/ ^& K: s
   ode23       - Solve differential equations, low order method.
. P: F6 T0 w2 D' \# }5 V   ode23p      - Solve and plot solutions.
   ode45       - Solve differential equations, high order method.
: e) w1 C- N* }: h. n   quad        - Numerically evaluate integral, low order method.
3 s6 K% R! t- K0 b3 X   quad8       - Numerically evaluate integral, high order method.
   fmin        - Minimize function of one variable.
   fmins       - Minimize function of several variables.
   fzero       - Find zero of function of one variable.
   fplot       - Plot function.
+ K6 _' X4 w: c. O% {
See also The Optimization Toolbox, which has a comprehensive
8 |& W( V- E- ^) Z. f# ~  h3 P7 Z( u set of function functions for optimizing and minimizing functions.

晓夜寒风

>> help funfun
$ Q/ n( A% V8 N* C* C
" u# G" w7 z# V* { Function functions - nonlinear numerical methods.

# ]) c* G" R0 A# X% X   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.
   fmin        - Minimize function of one variable.
   fmins       - Minimize function of several variables.
/ u  Y" b! I+ x4 b0 d2 J! \   fzero       - Find zero of function of one variable.
0 R( p! P$ [  n, L. X   fplot       - Plot function.

7 }& {) \0 X! {5 a4 N% I( l See also The Optimization Toolbox, which has a comprehensive
  |2 j# Q9 J- f7 u- U/ K set of function functions for optimizing and minimizing functions.