MATLAB editor

There is another easy way to "cheat." On UNIX/Linux workstations, open up a new text editor and enter your frequently used statements there. On Windows, you can use the really nice MATLAB Editor. You can copy-and-paste multiple commands back and forth between the text editor window and the MATLAB window easily. If you want to save the commands, you certainly can add comments and annotations. You can consider this text file as a "free-format notebook" without having to launch the Microsoft Word Notebook for MATLAB. 

In a simulation, process parameters will be assigned mrmeric values. Rather than using these in the simulation, it is preferred to use variable names in the simulation and assign values to them in a separate file. To do so, select File, New, m-file in the Matlab command window. This opens the Matlab editor which enables you to assign values to parameters as shown in Fig.8.3. 

A MATLAB code, or m-file, is a collection of commands that are executed sequentially. Commands can be mathematical operations, function calls, flow control statements, and calls to the functions and scripts described in Section C.1.4. m-files are written using the MATLAB editor and have names such as my file. m. They are executed from the MATLAB command window by typing the name of the m-file (without the. m). Saving an m-file will avoid many hours of retyping the same commands. 

The user is encouraged to examine the program using the MATLAB Editor. 

MATLAB Fuzzy Inference System (FIS) editor can be found in Appendix 1. Figure 10.16 shows the control surface for the 11 set rulebase fuzzy logic controller. 

The commenting or uncommenting of MATLAB code line blocks can best be achieved from the MATLAB text editor window for an m file. Simply highlight a block of code lines via a mouse drag in the MATLAB text editor window, then click on the Text entry of the editor s toolbar and click Comment or Uncomment as appropriate. This action makes % commenting marks appear at or disappear from the front of each code line of the highlighted block. 

These files are simple text files and may be created in a variety of ways. One way is via die normal Notepad text editor. Simply type in a series of statements, and store diem as a file with extension. m. There are five ways in which diis file can be ran from die Matlab command window. 

Once the instrument and the sky datacube parameters have been modified according to the desired observation, the user can run FllnS. A preliminary step is to activate or deactivate the control flags. To do this, one must open FLAGS.m from Matlab or from a text editor. 

Figure 9 shows the complete process of developing a fuzzy inference system (FIS) for sorting and grading process using MATLAB [25]. The process consist of three main steps deflning the input and output in Membership Function Editor, set the fuzzy rule in Rule Editor, and obtaining the output for each rule in Rule and Surface Viewer. 

In addition to executing commands entered through the keyboard, you can also use commands stored as files. These files all end in the extension. m and are called M-files because of the file name extension. Long programs are usually created in a text editor and stored as an M-file that can be executed in a MATLAB session. Short programs are usually created and run directly on-line. Since MATLAB is an interpreter... 

To create an M-file (script type) using the built-in MATLAB m-editor/debugger, go to File menu as shown in Fig. 3.3. click on New (sub-menu), and choose the Script sub-submenu. Alternatively, while activating the MATLAB main window, you may click CTRL+N to open up the m-editor. 

Figure 3.3 MATLAB s m-editor is opened via the File menu, followed by the New sub-menu, and...

The built-in MATLAB m-editor will open up. Here you can paste the set of previous commands as shown in Fig. 3.4. 

Figure 3.4 MATLAB s built-in m-editor, in which commands can be entered line by line or pasted from another application.

Create the file named qroots.m in your present working directory using the MATLAB m-editor. 

Figure 3.S shows the set of commands as they appear in the MATLAB m-editor. qroots.m simply accepts a, b, and c coefficient values from the user as input parameters calculates two terms terml and term2 that will be utilized in finding the two quadratic roots si and s2 and finally prints out the...

Figure 3.5 MATLAB m-editor, in which the content of the qroots.m file is shown.

The first line defines the function xpowers, which has two outputs sq and cube and one input. The second line is a comment statement that is used to tell what xpowers is all about. The third and fourth lines calculate the values of input squared and cubed, respectively. While the main MATLAB window is active, press CTRL+N to activate the MATLAB m-file editor and paste the previous four lines. Save the file as xpowers.m. 

Open Im Process.m using the built-in MATLAB M-file editor. 

Twelfth, click the OK button (shown as a framed button in Fig. 5.24). MATLAB will return to the main Fit Editor window as shown in Fig. 5.25a. Figure 5.25b shows the new look of the Curve Fitting Toolbox window where the user selects Custom Equation from the main category drop-down list and then enters the expression fory = f x a, b, c). 

As a result, the newgui.m file will open up via the MATLAB M-file editor, in addition to the newgui.fig itself as shown in Figs. 11.2 and 11.3. respectively. 

The programs written in the language of MATLAB should be saved with the extension of m , from where the name of m-file comes. If you use the editor of MATLAB, it automatically saves your files with the w extension. Otherwise, be sure to save them with the m extension. M-files can be in the form of scripts ondi functions and could be executed in the MATLAB workspace. 

A script is simply a series of MATLAB commands that could have been entered in the workspace. When typing the name of the script, the commands will be executed in their sequential order as if they were individually typed in the workspace. For example, let us calculate the volume of an ideal gas as a function of pressure and temperature. Type the following commands in the editor and save it as myscript.m ... 

This is an exact duplicate of the Command Window session and includes everything from the diary session command until diary of f. The contents of the file are displayed in the Editor window. This window is similar to the VBA editor window in that this is where MATLAB programs are coded. 

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