matlab函数英文说明
更新时间:2023-07-21 22:08:01 阅读量: 实用文档 文档下载
sin - Sine of argument in radians
This MATLAB function returns thesine of the elements of X.
rand - Uniformly distributed pseudorandom numbers
This MATLAB function returns a pseudorandom scalar drawn from the standard uniform distribution on the open interval (0,1).
global - Declare variables as global
This MATLAB function declares variables var1 ...
sqrt - Square root
This MATLAB function returns the square root of each element of the array X. title - Add title to current axes
This MATLAB function adds the title consisting of a string, str, at the top and
in the center of the current axes.
meshgrid - Rectangular grid in 2-D and 3-D space
This MATLAB function replicates the grid vectors xgv and ygv to produce a full
grid.
inv - Matrix inverse
This MATLAB function returns the inverse of the square matrix X.
inf - Infinity
This MATLAB function returns the IEEE arithmetic representation for positive
infinity.
fix - Round toward zero
This MATLAB function rounds the elements of A toward zero, resulting in an array
of integers.
ones - Create array of all ones
This MATLAB function returns the scalar 1.
linspace - Generate linearly spaced vector
This MATLAB function returns a row vector with 100 linearly spaced points in the
interval [x1,x2].
sort - Sort array elements
This MATLAB function sorts the elements of A in ascending order along the first
array dimension whose size does not equal 1.
grid - Grid lines for 2-D and 3-D plots
This MATLAB function adds major grid lines to the current axes.
plot - 2-D line plot
This MATLAB function creates a 2-D line plot of the data in Y versus the
corresponding values in X.If X and Y are both vectors, then they must have equal length.
surf - 3-D shaded surface plot
This MATLAB function creates a three-dimensional shaded surface from the z
components in matrix Z, using x = 1:n and y = 1:m, where [m,n] = size(Z).
ylabel - Label y-axis
This MATLAB function labels the y-axis of the current axes with the string, str. xlabel - Label x-axis
This MATLAB function labels the x-axis of the current axes with the text
specified by str.
function - Declare function name, inputs, and outputs
This MATLAB function declares a function named myfun that accepts inputs
x1,...,xM and returns outputs y1,...,yN.
disp - Display text or array
This MATLAB function displays the contents of X without printing the variable
name.
num2str - Convert number to string
This MATLAB function converts array A into a string representation str.
continue - Pass control to next iteration of for or while loop
This MATLAB function temporarily interrupts the execution of a program loop,
skipping any remaining statements in the body of the loop for the current pass. xlswrite - Write Microsoft Excel spreadsheet file
This MATLAB function writes array A to the first worksheet in Excel file,
filename, starting at cell A1.
find - Find indices and values of nonzero elements
This MATLAB function returns a vector containing the linear indices of each
nonzero element in array X.
mesh - Mesh plot
This MATLAB function draws a wireframe mesh with color determined by Z, so color
is proportional to surface height.
polar - Polar coordinate plot
This MATLAB function creates a polar coordinate plot of the angle theta versus
the radius rho.
round - Round to nearest decimal or integer
This MATLAB function rounds each element of X to the nearest integer.
log - Natural logarithm
This MATLAB function returns the natural logarithm ln(x) of each element in
array X.
input - Request user input
This MATLAB function requests user input by displaying the prompt string on the
screen.
isprime - Determine which array elements are prime
This MATLAB function returns a logical array the same size as X.
abs - Absolute value and complex magnitude
This MATLAB function returns the absolute value of each element in array X.
tan - Tangent of argument in radians
This MATLAB function returns the tangent of each element of X.
axis - Axis scaling and appearance
This MATLAB function sets the limits for the x- and y-axis of the current axes. eye - Identity matrix
This MATLAB function returns the scalar, 1.
varargin - Variable-length input argument list
This MATLAB function is an input variable in a function definition statement
that allows the function to accept any number of input arguments.
nargin - Number of function input arguments
This MATLAB function returns the number of input arguments passed in the call to the currently executing function.
diag - Create diagonal matrix or get diagonal elements of matrix
This MATLAB function returns a square diagonal matrix with the elements of
vector v on the main diagonal.
menu - Generate menu of choices for user input
This MATLAB function displays the menu whose title is in the string variable
'mtitle' and whose choices are string variables 'opt1', 'opt2', and so on.
save - Save workspace variables to file
This MATLAB function saves all variables from the current workspace in a MATLAB
formatted binary file (MAT-file) called filename.
addpath - Add folders to search path
This MATLAB function adds the specified folders to the top of the search path. fprintf - Write data to text file
This MATLAB function applies the formatSpec to all elements of arrays A1,...An in column order, and writes the data to a text file.
sprintf - Format data into string
This MATLAB function formats the data in arrays A1,...,An according to
formatSpec in column order, and returns the results to string str.
figure - Create figure window
This MATLAB function creates a new figure window using default property values. sign - Signum function
This MATLAB function returns an array Y the same size as X, where each element
of Y is:
var - Variance
This MATLAB function returns the variance of X for vectors.
rem - Remainder after division
This MATLAB function returns the remainder after division of X by Y.
sound - Convert matrix of signal data to sound
This MATLAB function sends audio signal y to the speaker at the default sample
rate of 8192 hertz.
exit - Terminate MATLAB program (same as quit)
This MATLAB function terminates the current session of MATLAB after running
finish.m, if the file finish.m exists.
tic - Start stopwatch timer
This MATLAB function starts a stopwatch timer to measure performance.
toc - Read elapsed time from stopwatch
This MATLAB function reads the elapsed time from the stopwatch timer started by
the tic function.
floor - Round toward negative infinity
This MATLAB function rounds each element of X to the nearest integer less than
or equal to that element.
magic - Magic square
This MATLAB function returns an n-by-n matrix constructed from the integers 1
through n^2 with equal row and column sums.
ginput - Graphical input from mouse or cursor
This MATLAB function enables you to identify n points from the current axes and
returns their x- and y-coordinates in the x and y column vectors.
uiimport - Import data interactively
This MATLAB function opens a dialog to interactively load data from a file or
the clipboard.
dot - Dot product
This MATLAB function returns the scalar dot product of A and B.
cross - Cross product
This MATLAB function returns the cross product of A and B.
text - Create text object in current axes
This MATLAB function adds the string in quotes to the location specified by the
point (x,y) x and y must be numbers of class double.
nan - Not-a-Number
This MATLAB function returns the IEEE arithmetic representation for Not-a-Number
(NaN).
subplot - Create axes in tiled positions
This MATLAB function divides the current figure into an m-by-n grid and creates
an axes for a subplot in the position specified by p.
legend - Add legend to graph
This MATLAB function creates a legend in the current axes using the specified
strings to label each set of data.
clock - Current date and time as date vector
This MATLAB function returns a six-element date vector containing the current
date and time in decimal form:
date - Current date string
This MATLAB function returns a string containing the date in the format,
day-month-year, for example, 01-Jan-2014.
isreal - Determine if array is real
This MATLAB function returns logical 1 (true) if A does not have an imaginary
part.
zeros - Create array of all zeros
This MATLAB function returns the scalar 0.
sinh - Hyperbolic sine of argument in radians
This MATLAB function returns the hyperbolic sine of the elements of X.
pause - Halt execution temporarily
This MATLAB function, by itself, causes the currently executing function to stop
and wait for you to press any key before continuing.
sum - Sum of array elements
This MATLAB function returns the sum of the elements of A along the first array dimension whose size does not equal 1:
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