Ministry of education and science, youth and sport of Ukraine

National Aviation University

Computer Science Faculty

Department of Software Engineering

Computer Architecture

Laboratory work 3

The Desktop Tools

And In The Development Environment

Prepared by: Student of CSF-205

Bashuk Kirill

Accepted by: Associate Professor

Romanov E.I.

Kyiv 2012

Content

Conclusion 14

References 15

Lab_2 CA_Sec.pdf . Romanov E.I. 1p. 15

Lec_2_CA_engl.pdf . Romanov E.I. 5p. 15

Help of MatLab R2012a (7.14.0.739). The MathWorks Inc. 1984-2012 15

Official link of software: http://www.mathworks.com/ 15

Subject: Working With The Desktop Tools And In The Development Environment

Goal: Study MATLAB Desktop Tools and Development Environment

Tasks

1. Current Directory, Search Path, and File:

• Management;

• About the Current Directory and Search Path;

• Current Directory;

• Search Path.

2. Workspace Browser and Variable Editor:

• Workspace Browser;

• Variable Editor.

3. Editor:

• Editing M-Files;

• Publishing M-Files.

4. Improving and Tuning M-Files:

• Finding Errors Using the M-Lint Code Report;

• Improving Performance Using the Profiler.

Current Directory, Search Path, and File Management

Current Directory

Fig.1 Current folder(1)

The current directory Fig.1 is also known as the present working directory or the current folder. You can specify the current directory for the MATLAB application when it first starts. This directory is called the startup directory.

Fig.1 Current folder(2)

A quick way to see the full path to the current directory or change it to a different directory is by using the Current Directory field in the desktop toolbar. Fig. 2

You can use the Current Directory browser, a desktop tool that provides a convenient way to organize and manage your files in MATLAB. You can view, open, and make changes to directories and files. Using the Current Directory browser, you can find files and use MATLAB application features on your files such as running them or opening them. Alternatively, you can use equivalent functions to organize and manage your files, including dir, cd, and delete.

There are many other features you can use in the Current Directory browser, such as generating reports to help you tune and manage your M-files. You can also interface with your source control system.

Search Path

MATLAB uses a search path to find M-files and other files related to MATLAB, which are organized in directories on your file system. Any file you Want to run in MATLAB must reside in the current directory or in a directory that is on the search path. By default, the search path includes files supplied with MATLAB and other MathWorks products. At startup, MATLAB also adds the userpath directory, a location where you can store files you create for use with MATLAB. If you have M-files and related files for MATLAB in other locations, add the directories in which they are located to the MATLAB search path. However, do not store the files in directories supplied by The MathWorks, or you might experience problems.

To see which directories are on the search path or to add directories to or remove them from the search path, select File > Set Path Fig.3

and use the resulting Set Path dialog box. Alternatively, you can use the path function to view the search path, addpath to add directories to the path, and rmpath to remove directories from the path.

The following illustration shows an example of how the MATLAB search path works.

Fig.3 Set Path dialog box

The order of directories on the path can be important. When there are two files with the same name, one in the current directory and the other in a directory on the search path, or both in directories on the search path, it is considered a name clash, and MATLAB follows rules to determine which file to run. If you get unexpected results, MATLAB might not be running the file you think it is, because another file of the same name is located in a directory that is higher up on the search path.

Workspace Browser and Variable Editor

Workspace Browser

The MATLAB workspace consists of the set of variables built up during a MATLAB session and stored in memory. You add variables to the workspace by using functions, running M-files, and loading saved workspaces.

To view the workspace and information about each variable, use the Workspace browser, or use the functions who and whos. Fig 4

To delete variables from the workspace, select the variables, and then select Edit > Delete. Alternatively, use the clear vars or clear functions.

Fig.4 Workspace browser

The workspace does not persist after you end the MATLAB session. To save the workspace to a file that can be read during a later MATLAB session, select File > Save, or use the save function. Saving preserves the workspace in a binary file called a MAT-file, which has a .mat extension. You can use options to save to different formats. To read in a MAT-file, select File > Import Data, or use the load function.