matlab函数英文说明(3)

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.