MATLAB CommandsMATLAB is an interactive program for numerical computing and data visualization. We can enter a command by typing it at the MATLAB prompt '>>' on the Command Window. In this topic, we will provide lists of frequently used general MATLAB commands. On-Line help| Commands | Purpose |
|---|
| help | lists topics on which help is available | | helpwin | opens the interactive help window | | helpdesk | Opens the web-browser-based help facility | | help topic | provide help on the topic | | lookfor string | lists help topics containing a string | | demo | runs the demo program | | lookfor | Keyword search for help | | doc | Online HTML documentation | | whatsnew | Display ReadMe files | | info | Info about MATLAB | | syntax | Help on command syntax | | why | Give a philosophical device | | format | Set screen output format | | more | Control paged screen output | | home | Send cursor home | | echo | Echo commands in the script file | | ↑,↓ | Recall previous commands | | global | Declare variables to be global |
Variable and Workspace Information| Commands | Purpose |
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| who | lists variables currently in the workspace | | whos | lists variables directly in the workspace with their size | | what | lists M-, Mat-, and Mex directories on the disk | | clear | clear the workspace, and all variables are removed | | clear x, y, z | clear only variables x, y, and z. | | clear all | Clears all variables and function from workspace | | mlock fun | locks function fun so that clear cannot delete it | | munlock fun | unlocks functions fun so that clear cannot remove it | | clc | clears command window, cursor shift to the top | | home | scrolls the command window, cursor moves to the top | | clf | clear figure window | | load | Load variable from file | | save | Save variable in Mat-file | | length | Length of a vector | | size | Size of a matrix | | pack | Consolidate memory space | | disp | Display text or matrix |
Working with Files and Directory Information| Commands | Purpose |
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| pwd | shows the current working directory | | cd | changes the current working directory | | dir | lists contents of the current directory | | ls | lists contents of the current files, same as dir | | path | gets or sets MATLAB search path | | editpath | modifies MATLAB search path | | copyfile | copies a file | | mkdir | creates a new directory | | rmdir | Remove directory | | delete | Delete file | | diary | Save text of MATLAB session | | type | Show contents of the file | | ! | Access operating system | | path | List accessible directories | | what | Lists all MATLAB data in the current directory. | | wklread | Reads .wk1 spreadsheet file. |
General Information| Commands | Purpose |
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| computer | tells you the computer type you are using | | clock | gives you wall clock time and date as a vector | | date | tells you the date as a string | | more | control the paged output according to the screen size | | ver | gives the license and the MATLAB version data | | bench | benchmarks our computer on running MATLAB compared to other devices |
Start and Exist| Commands | Purpose |
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| ^c(Control-c) | local abort, kills the current command execution | | matlabarc | Master start-up file | | startup | M-file executed at start-up | | quit | Quit MATLAB | | exit | same as quit |
Time and Date| Commands | Purpose |
|---|
| clock | Wall clock time | | cputime | Elapsed CPU time | | date | Date, month, year | | etime | Elapsed time function | | tic | Start stopwatch timer | | toc | Read stopwatch timer |
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