Matlab7.0 command daquan

Manage commands and functions

Help online help file

Document loading hypertext description

Directory list of what m, MAT, MEX files

Type list m file.

Lookfor searches for keywords through help entries.

It locates functions and files.

Demo runs the demo program

Path controls the search path of MATLAB.

Managing variables and workspaces

He listed the current variables.

Whos lists the current variables (long tables)

Load restores variables from disk files.

Save Save workspace variables.

Clears variables and functions from memory.

Pack organizes workspace memory.

Size of the size matrix

Length of length vector

Display matrix or

Commands related to files and operating systems

Change the current working directory.

Directory list

Delete delete file

Getenv gets the environment variable value

! Execute DOS operating system commands

Unix executes UNIX operating system commands and returns the results.

MATLAB task of diary saving

Control command window

Cedit settings command line editing

Clc clear command window

Place the main cursor in the upper left corner.

Format the output format.

Echo commands used in echoing original documents.

"More" controls paging output in the command window.

Starting and exiting MATLAB

Exit exit MATLAB

Start the M file executed when referencing MATLAB.

Matlabrc host startup m file

general specification

Info MATLAB system information and Mathworks company information

Subscribe becomes a subscription user of MATLAB.

Identification code of hostid MATLAB main service program

Whatsnew does not contain the new information in the manual.

Version information

Operators and special characters

+Jia

-Minus sign

* Matrix multiplication

* Array multiplication

Matrix power

. Array power

\ Left separator or backslash

/Right dividing line or diagonal line

. /array division

Krone Kroneck tensor product

: colon

() brackets

[] square brackets

decimal point

.. parent directory

... go on

, comma

; semicolon

% comments

! exclamation mark

Transpose or quote

= distribution

= = equal

& lt& gt relational operator

& Logic and

Logical or

~ logical negation

Logical XOR

logic function

Exist checks whether a variable or function exists.

Any element of any vector is true and its value is true.

When the elements of all vectors are true, all vectors have true values.

Find finds the index number of a non-zero element.

trigonometric function

sine function

Hyperbolic sine

Asin arcsine

Inverse hyperbolic sine

Cosine cosine

Hyperbolic cosine

anticosine

Inverse hyperbolic cosine

Tangent tangent value

Hyperbolic tangent

arc tangent

Atan2 quadrant arc tangent

Inverse hyperbolic tangent

Seconds secant

Hyperbolic secant

Inverse hyperbolic secant

Csc cotangent

coth

anticotangent

Acsch inverse hyperbolic cotangent

Kottyuce

coth

anticotangent

Inverse hyperbolic cotangent

exponential function

Exponential index

Logarithmic natural logarithm

Log 10 common logarithm

Square root of Sqrt

function of a complex variable

Abs absolute value

Triangle phase angle

Conj complex conjugate

Complex imaginary part of image

Real part of real complex number

Numerical function

The fixed value is rounded to zero.

The floor is rounded to negative infinity.

Ceil rounds to positive infinity.

Round to the nearest integer.

Rem divides and takes the remainder.

Symbolic function

Basic matrix

Zero matrix

Complete "1" matrix

Eye recognition matrix

Random number matrix with random and uniform distribution

Random number matrix with random normal distribution

Logarithmic interval vector in logarithmic space

X and y arrays of grid three-dimensional graphics

: vectors at regular intervals

Special variables and constants

Ans current answer

Eps relative floating-point precision

Maximum floating point number

Minimum floating point number

Pippi

I, j imaginary unit

Inf infinity

Nan non-numerical value

Flops floating-point operation time

Number of input variables of Narkin function

Number of output variables of Nargout function

Computer computer type

Isieee is true when the computer adopts the ieee arithmetic standard.

Why do you want a short answer?

Version MATLAB version number

Time and date

wall clock

Date calendar

Etime timing function

Tick-tock stopwatch began to time.

Toc timing function

Cputime CPU time (seconds)

matrix operation

Diag creates and extracts diagonal matrices.

Fliplr matrix flips left and right.

Flipud matrix flips up and down.

Remolding changes the size of the matrix.

Rot90 matrix rotates 90 degrees.

Tril extracts the lower triangular part of the matrix

Triu extracts the upper triangular part of the matrix

: the index number of the matrix, and rearrange the matrix.

Universal adjoint matrix

Hadamard Hadamard matrix

Hankel matrix

hilbert matrix

Inverse Hilbert matrix

Krone Kroneck tensor product

Cube matrix

toeplitz

Van der Vandermonde matrix

Matrix analysis method

Conditional number of conditional calculation matrix

Calculate the norm of a matrix or vector.

Estimation of inverse condition value of Rcond Linpack

Rank calculation matrix rank

Det calculates matrix determinant value

Trace calculates the trace of matrix

Zero matrix

orthogonalization

linear equation

\ Sum/solution of linear equations

Coleski decomposition

Lugaus elimination coefficient matrix

Inversion of invariant convex matrix

Orthogonal triangular matrix decomposition (Qr decomposition)

Pseudo-inverse of Pinv matrix

Eigenvalues and singular values

Finding eigenvalues and eigenvectors

Aggregating characteristic polynomials

Hester *** erg form

Qz generalized eigenvalue

Cdf2rdf variable complex diagonal matrix is a real block diagonal form.

Schur Schur decomposition

Balance matrix balance processing to improve the accuracy of eigenvalues

singular value decomposition SVD

matrix function

Expm matrix index

Expm 1 implements the m file of expm.

Finding matrix exponent by Taylor series

Expm3 finds the matrix index by eigenvalue and eigenvector.

Logm matrix logarithm

Open square root of Sqrtm matrix

Calculation of Funm general matrix

Functional-nonlinear numerical method

Low-order method for solving ordinary differential equations

The Ode23p low-order method is used to solve ordinary differential equations, and the result diagram is drawn.

Higher order method for solving ordinary differential equations

Calculation of numerical integration by fourth-order low-order method

Calculation of numerical integration by Quad8 higher-order method

Minimum change of Fmin univariate function

Minimization of Fmins Multivariable Function

Fzero finds the zero point of a unary function.

Fplot function diagram

polynomial function

Finding polynomial roots

Poly constructs polynomials with specified roots

Polynomial calculation of matrix variables

Remaining Fraction Expansion (Remaining Calculation)

Polynomial fitting of Polyfit data

Multivariate differential polynomial

Conv polynomial multiplication

Deconv polynomial division

Create and control graphical windows

Figure Create a graph

Gcf gets the handle of the current graph.

Clf clears the current drawing.

Close Closes the chart.

Establish and control coordinate system

The subgraph establishes a coordinate system at the calibration position.

Axis establishes a coordinate system at any position.

Gca gets the handle of the current coordinate system.

Cla clears the current coordinate system.

Axis controls the scale and form of the coordinate system.

Coordinate axis control pseudo-color coordinate scale

Keep the current drawing.

Working with graphical objects

Figure to create a graphical window

Axis establishment coordinate system

Line-building curve

Text creates a text string.

Patching creates a graphic fill block.

Surfaces Create Surfaces

Images to create images

Uicontrol establishes user interface controls.

Uimen establishes the user interface menu.

Handling graphics operations

Set the setting object

Get the characteristics of the obtained object

Reset resets the object characteristics.

Delete delete object

M file of new drawing used to predict the next drawing attribute.

Gco gets the handle of the current object.

Drawnow fills in unfinished drawing events.

Findobj finds an object with the specified eigenvalue.

Printing and storage

Print Print or save a graphic.

Printopt configures the local printer default value.

Direction Sets the paper direction.

The capture screen captures the current drawing.

Basic x-y graph

Draw a linear graph

Logarithmic-logarithmic coordinate diagram

Semi-logarithmic coordinate diagram (X axis is logarithmic coordinate)

Semi-logarithmic coordinate diagram (y axis is logarithmic coordinate)

Fill drawing two-dimensional polygon fill map

Special x-y graph

polar diagram

bar chart

Stem discrete sequence diagram or bar chart

Stair ladder diagram

Error bar graph error bar graph

Historical histogram

Rose angle histogram

Traffic area map

Feather arrow diagram

Fplot drawing function

Et star map

Graphic annotation

Title graphic title

Xlabel x-axis marker

Yabel y-axis marker

Text text annotation

Place the text with the mouse.

grid line

MATLAB programming language

Function adds a new function.

Eval executes a string composed of MATLAB expressions.

Feval executes the function specified by the string.

Global defines global variables.

program control flow

If conditional execution statement

Else is used with the if command.

Elseif is used with the if command.

End For, while, and if statements

For repeats the specified number of times (loop)

Repeat an indefinite number of times at the same time (cycle)

Break terminates the execution of the loop.

Returns the referenced function.

Error displays information and terminates the execution of the function.

Interactive input

Input prompts the user for input.

Keyboard uses the keyboard to input like a manuscript file.

Menu generates a menu selected by user input.

Pause for user response.

Uimenu establishes a user interface menu.

Uicontrol establishes user interface controls.

Universal string function

Interpretation of string function in string MATLAB

Abs changes the string to a numeric value.

Setstr variable value is a string.

When the variable is a string, Isstr is true.

Blank string

Deblurring deletes the empty string at the end.

Str2mat forms a text matrix from each string.

Eval executes a series of MATLAB expressions.

String comparison

Strcmp comparison string

Findstr looks for another substring in the string.

Upper changes the string to uppercase.

Lower changes the string to lowercase.

When a variable is a letter, its value is true.

Isspace when the variable is a blank character, its value is true.

Conversion between string and numeric value

Num2str variable value is string.

Int2str turns integers into strings.

Str2num changes the string to a numeric value.

Sprintf variable values are format-controlled strings.

Sscanf changes a string to a numeric value under format control.

Conversion between decimal and hexadecimal

Hex2num changes hexadecimal to floating point number under IEEE standard.

Hex2dec changes hexadecimal number to decimal number.

Dec2hex changes decimal number to hexadecimal number.

make a model

Dynamic characteristics of additional supplementary system

The state of the variable as an output.

Blkbuild Constructs State Space System from Block Diagram

Closed loop system

Connection block diagram modeling

Conv convolution of two polynomials

Destim forms a discrete state estimator from the gain matrix.

Dreg forms a discrete controller and estimator from the gain matrix.

Drmodel generates random discrete models.

Estim forms a continuous state estimator from the gain matrix.

Feedback feedback system connection

Ord2 generates a, b, c and d of the second-order system.

Pade approximation of Pade delay

Parallel system connection

Reg forms a continuous controller and estimator from the gain matrix.

Rmodel generates stochastic continuous model.

Series series system connection

Ssdelete deletes an input, an output, or a state from the model.

Ssselect selects subsystems from a large system.

Model transformation

C2d transforms a continuous system into a discrete system.

C2dm transforms a continuous system into a discrete system through a specific method.

C2dt is a continuous discrete system with time delay.

D2c becomes a discrete to continuous system.

D2cm is transformed into a continuous system by a specific method.

The variable root value of Poly is expressed as a polynomial.

Fractional expansion of remaining part

The state space of Ss2tf variable is represented by transfer function.

The state space representation of Ss2zp variable is zero-pole representation.

Tf2ss variable transfer function is expressed as state space representation.

Tf2zp variable transfer function representation is zero pole representation.

The zero-crossing pole of Zp2tf is expressed as a transfer function.

The zero-crossing pole of Zp2ss is represented as a state space representation.

Model simplification

Balanced realization

Realization of real discrete balance of database

Reduced order of Dmodred discrete model

Minimum real number realization and zero-pole cancellation

Model simplification

Model realization

Canon normal form

Controllable step shape

A rather large step shape.

Ss2ss adopts similarity transformation.

Model characteristics

Covar continuous covariance response to white noise

Controllable matrix

Damping coefficient and natural frequency of damper

Dcgain continuous steady-state (DC) gain

Discrete covariance response of Dcovar to white noise

Ddamp discrete damping coefficient and natural frequency

Discrete system gain

Discrete controllability and observability of Dgram

Dsort sorts discrete eigenvalues by size.

Eig eigenvalue and eigenvector

Esort arranges continuous eigenvalues according to real parts.

Gram controllability and observability

Obsv observable matrix

Printsys format display system

Polynomial root

Tzero transmission zero

Tzero2 uses random perturbation method to transfer the zero point.

time domain response

Pulse discrete time unit impulse response

Initial discrete time zero input response

Discrete-time Simulation of Dlsim under Arbitrary Input

Discrete time step response

Simulation of filter single-input single-output Z transform

Impulse response

Initial continuous time zero input response

Continuous-time simulation under arbitrary input of Lsim

Ltitr low-level time response function

step response

jump function

Frequency domain response

Porter-Porter diagram (frequency domain response)

Discrete Porter diagram

Dnichols discrete nichols graph

Dnyquist discrete Nyquist diagram

Dsigma discrete singular value frequency domain diagram

Fast bode diagram of Fbode continuous system

Frequency response of frequency laplace transform

Frequency response of frequency z transform

Ltifr low level frequency response function

Margin gain and phase margin

Nichols-Nichols Stu

Ngrid draws the grid lines of Nicole Stu

Nyquist

Sigma singular value frequency domain diagram

Root locus

Pzmap zero-pole diagram

Rlocfind interactive determination of root trajectory gain.

Rlocus draws the root trajectory.

Sgrid draws a continuous root trajectory on the grid.

Zgrid draws discrete root trajectories on the grid.

gain select

Single-input single-output pole configuration

Design of Dlqe Discrete Linear Quadratic Estimator

Design of Dlqew discrete linear quadratic estimator

Design of Dlqr Discrete Linear Quadratic Regulator

Design of Output Weighted Discrete Regulator

Design of Lqe Linear Quadratic Estimator

Design of Lqed Discrete Estimator Based on Continuous Cost Function

Lqe2 uses Schur method to design linear quadratic estimator.

Design of Lqew Generalized Linear Quadratic Estimator

Design of Lqr linear quadratic regulator

Design of Lqrd Discrete Regulator Based on Continuous Cost Function

Design of Lqry Output Weighted Regulator

Lqr2 adopts Schur method to design linear quadratic regulator.

Place pole

Equation solving

Solution of Riccati equation of algebra

Solutions of Dlyap Discrete Lyapunov Equation

The solution of Lyapunov continuous equation

Lyapunov solves Lyapunov equation by diagonalization.

Demonstration example

Introduction of Ctrldemo control toolbox

LQG design of Boildemo boiler system

Typical design of yaw damping of Jetdemo jet aircraft

Digital control of hard disk controller for disk demonstration

Design and Simulation of Kalman Filter

Utility tool

Abcdchk detects the consistency of (a, b, c, d) groups.

Chop occupies n important positions.

Discrete sampling response function

Dfrqint discrete bode diagram automatic ranging algorithm

Dfrqint2 discrete Nyquist diagram automatic ranging algorithm

Discrete multivariable response function

Distance from a straight line

Residue calculation of Dric discrete Riccati equation

Dsigma2 DSIGMA utility function

Automatic ranging algorithm for Dtimvec discrete time response

Exresp sampling response function

Automatic range determination algorithm of frequency bode diagram

Automatic ranging algorithm of frequency 2 Nyquist diagram

Freqresp low-level frequency response function

Givens rotation

Housh constructs the transformation of household head.

Imargin uses interpolation techniques to calculate gain and phase margin.

Lab2ser changes the label to a string.

Multivariable response function

Nargchk detects the number of variables in the m file.

Find the nearest orthogonal point

Poly2str converts polynomials into strings.

Print matrix with row number and column number

Residue calculation of Riccati equation

Schord ordered Schwr decomposition

Sigma2 SIGMA uses functions.

Tfchk detects the consistency of the transfer function.

Timvec continuous time response automatic ranging algorithm

Tzreduce simplifies the system when calculating the zero crossing.

Vsort matches the vectors of two trajectories.