Shulou(Shulou.com)06/01 Report--

This article mainly introduces the Matlab program debugging and programming skills, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor with you to understand.

Program debugging and programming skills

When writing a matlab program, errors are inevitable, so it is necessary to debug the program. In matlab, there are two main methods of m file debugging: direct debugging method and tool debugging method.

Spelling errors: errors will be prompted.

Syntax error: for example, 6max 0, the output is infinite inf. Chen Xiaogu may not report an error at run time, but the output result is not normal.

Logic errors: such errors are very hidden, usually the algorithm of the program is not well considered, the program can be executed normally, but the output does not meet the expected value.

For programs that are not very complex, you can use the direct debugging method to debug the program.

1. If the program goes wrong or gives a warning message, carefully analyze the error or warning message, you will get the cause of the error.

two。 In the program, the intermediate result of the function M file is displayed by using the function disp ().

3. In a function M file, you can modify the function M file to a script M file for debugging.

4. Mask some lines of the program with comments, and enter the commentator% in front of the line.

5. Add the keyboard function where the program is debugged.

The Debugger tool can be used to debug the program in the graphics window.

1. Debugging based on the command line

Enter help debug in the command line window to view debug commands

two。 Graphical program debugging

1. Error handling

In the process of running the program, if you encounter warnings or errors, you need to deal with them. In matlab, you can use the try.. catch statement to catch errors, use the function error () to send out error messages, and use the function warning () to issue warning messages.

Performance Analysis of 2.m Files

In matlab, the syntax and logic errors in the program can be corrected by debugging the program. After the end of the program body, the matlab program written by the user can run normally, but it may not be the best, and the running efficiency is not the best. This needs to analyze and optimize the performance of the matlab program.

The m-file analysis tools provided by matlab include code analyzer and profiler tools, both of which have graphical interfaces and are very convenient to use.

3. Programming skills

(1) timing: use the functions tic and toc for timing, use function etime for timing, and use cputime for timing

(2) prevent the program from entering the endless loop

(3) if multiple loops must be used, but the number of times of execution of the two loops is different, it is recommended that the number of times of the outer loop is less and the number of times of the inner loop is higher.

(4) for large matrices, if the dimensions are defined in advance, the execution time of the program will be reduced and the operation efficiency of the program will be improved.

(5) in the Centennial City program, the intrinsic function of matlab is limited to be considered.

Thank you for reading this article carefully. I hope the article "what are the programming and programming skills in Matlab" shared by the editor will be helpful to you. At the same time, I also hope that you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.