ForĮxample, suppose an M-file named example.m is located in the path. The M-file from the MATLAB command window (without the. Type in your MATLAB commands and then save theįile to a directory that is in the path. The M-files that comeĬreate an M-file, click on “File” then click on “New” then click on “M-file” andĪn editor screen will appear. That directory should be added to the path. M-files associated with this textbook should be downloaded fromĭirectory. Then toĪccess that M-file, add that directory to the path by clicking “File” thenĬlicking “Set Path” and following directions. User-defined M-file stored in a directory called "\MATLAB\MFILES". For example, consider using MATLAB on a PC with a Requires that the M-file must be stored in a directory that is specified in the In M-files that are available from the textbook website.įollowing describes the use of M-files on a PC version of MATLAB. All of the MATLAB examples in this textbook are contained Macros of MATLAB commands that are stored as ordinary text files with theĪn M-file can be either a function with input and output variables or it can beĪ list of commands. The command length(x) returns the length of a vector x and size(x) returns the dimension of The commands who and whos give the names of the variables that have been defined in the Significant digits to the right of the decimal. To change the format of the display, type formatĭecimal places, format long e for scientific notation with 15 significant decimal places and format bank for placing two The number of digits displayed is not related to theĪccuracy. ![]() Help followed by a particular function name or M-file name. ![]() On-line help for MATLAB can be reached by typing help for the full menu or typing Instead you multiply their elements together:Ĭomment statements are preceded by a "%". Tcos(t) at specific points in time, you cannot simply multiply the vector t with the vector cos(t). For example, to obtainĪ vector x that contains the elements of x(t) = Operations that need to be performed element-by-elementĬan be accomplished by preceding the operation by a ".". For example,Ĭreates a vector x with elements equal to cos(2t) for t = For example,Ī = b = c = a + b yields: c =įunctions are applied element by element. Operations and functions that were definedįor scalars in the previous section can also be used on vectors and matrices. However, vectors are used throughout the text. In this text, matrices are used only in Chapter 12 Places the number 5 in the first row, second column. There are a number of special matrices that can beĪ particular element of a matrix can be assigned: Matrices are defined by entering the elements row by row: Given, then the increment is set to a default of 1:Ĭreates a 1x11 vector with the elements 0, 1, 2. Note that the middle number defines the increment. The second method is used for creating vectors withĬreates a 1x101 vector with the elements 0. Additionalĭefined vectors can be used to define a new vector. That commas could have been used in place of spaces to separate the elements. The first method isĬreates a 1x4 vector with elements 1, 3, 5 and 7. Therefore, vector and matrix operations are as simple as MATLAB is based on matrix and vector algebra even scalarsĪre treated as 1x1 matrices. Which can be verified by using Euler's formula: For example, with y = 2+8i as defined above, Sine function, assumes argument is in radians Some common functions that are used in this text are: absĬosine function, assumes argument is in radians ![]() There are also a number of predefined functions that canīe used when defining a variable. 5+6+7 There are several predefined variables which can be used atĪny time, in the same manner as user-defined variables: i If your expression does not fit on one line, use anĮllipsis (three or more periods at the end of the line) and continue on the next line. To determine the value of a previously defined quantity, Was defined previously, the following expression is valid ![]() These operators and either numbers or previously defined variables. MATLAB utilizes the following arithmetic operators: +Ī variable can be assigned using a formula that utilizes The answer will not be displayed when a semicolon is putĪt the end of an expression, for example type a = 1+2. Variables are assigned numerical values by typing the After each MATLAB command, the "return" or "enter" key must be Icon and is ended by typing exit or by using the menu MATLAB is started by clicking the mouse on the appropriate
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |