matlab中输出命令_MATLAB中的命令

绝地灬酷狼 2023-03-05 07:29 6阅读 0赞

matlab中输出命令

Commands are the instructions entered by the user to any software or system to perform certain work in the same way we can give commands to MATLAB software to the mathematical operation in the system by the help of various operators and commands.

命令是用户输入到任何软件或系统以执行某些工作的指令，其方式与我们可以借助各种操作员和命令将MATLAB软件的命令传递给系统中的数学运算的方式相同。

Mainly command is entered in the command window by typing it at the MATLAB prompt **">>"** on the command window.

通过在命令窗口的MATLAB提示符**“ >>”**处键入命令，可以在命令窗口中输入命令。

**MATLAB provides various commands** for managing different work or session. Some commands and there working is shown below:

**MATLAB提供了各种命令**来管理不同的工作或会话。 下面显示了一些命令并可以正常工作：

### 通用命令 **(**Commands for general purposes**)** ###

**Operators and special characters**

**运算符和特殊字符**

<table> 
 <tbody> 
  <tr> 
   <th>Operator</th> 
   <th>Description</th> 
  </tr> 
  <tr> 
   <td>+</td> 
   <td>Plus or addition operator</td> 
  </tr> 
  <tr> 
   <td>*</td> 
   <td>Scalar and multiplication </td> 
  </tr> 
  <tr> 
   <td>-</td> 
   <td>Minus or subtraction operator</td> 
  </tr> 
  <tr> 
   <td>^</td> 
   <td>Matrix exponential operator</td> 
  </tr> 
  <tr> 
   <td>\</td> 
   <td>Left-division operator</td> 
  </tr> 
  <tr> 
   <td>/</td> 
   <td>Right-division operator</td> 
  </tr> 
  <tr> 
   <td>()</td> 
   <td>Parentheses</td> 
  </tr> 
  <tr> 
   <td>[]</td> 
   <td>Brackets</td> 
  </tr> 
 </tbody> 
</table>

<table> 
 <tbody> 
  <tr> 
   <th> 操作员 </th> 
   <th> 描述 </th> 
  </tr> 
  <tr> 
   <td> + </td> 
   <td> 加号或加号运算符 </td> 
  </tr> 
  <tr> 
   <td> * </td> 
   <td> 标量和乘法 </td> 
  </tr> 
  <tr> 
   <td> -- </td> 
   <td> 减号或减号运算符 </td> 
  </tr> 
  <tr> 
   <td> ^ </td> 
   <td> 矩阵指数运算符 </td> 
  </tr> 
  <tr> 
   <td> \ </td> 
   <td> 左除算子 </td> 
  </tr> 
  <tr> 
   <td> / </td> 
   <td> 右除运算符 </td> 
  </tr> 
  <tr> 
   <td> () </td> 
   <td> 括弧 </td> 
  </tr> 
  <tr> 
   <td> [] </td> 
   <td> 括号 </td> 
  </tr> 
 </tbody> 
</table>

Above are some mathematical operators which are commonly used in Matlab to perform certain operations.

上面是一些数学运算符，通常在Matlab中用于执行某些运算。

The following are commands that can be used to eliminate variable or are used to obtain the information about the variables that we have already created in the program.

以下是可用于消除变量或用于获取有关我们已经在程序中创建的变量的信息的命令。

When these commands are typed in the command window and enter key is pressed, they either provide information, or they perform a task as listed below.

在命令窗口中键入这些命令并按Enter键时，它们要么提供信息，要么执行下面列出的任务。

<table> 
 <tbody> 
  <tr> 
   <td>Command</td> 
   <td>Description</td> 
  </tr> 
  <tr> 
   <td>Clear </td> 
   <td>Removes all variables from the memory.</td> 
  </tr> 
  <tr> 
   <td>Clear x y z</td> 
   <td>Removes only variables x, y, and z from the memory.</td> 
  </tr> 
  <tr> 
   <td>clc</td> 
   <td>Clears command window</td> 
  </tr> 
  <tr> 
   <td>exit</td> 
   <td>Checks for existence of file or variable</td> 
  </tr> 
  <tr> 
   <td>global</td> 
   <td>Declares variables to be global</td> 
  </tr> 
  <tr> 
   <td>quit</td> 
   <td>Stops Matlab</td> 
  </tr> 
  <tr> 
   <td>who</td> 
   <td>Lists current variables</td> 
  </tr> 
  <tr> 
   <td>whos</td> 
   <td>Lists current variables</td> 
  </tr> 
 </tbody> 
</table>

<table> 
 <tbody> 
  <tr> 
   <td> 命令 </td> 
   <td> 描述 </td> 
  </tr> 
  <tr> 
   <td> 明确 </td> 
   <td> 从内存中删除所有变量。 </td> 
  </tr> 
  <tr> 
   <td> 清除xyz </td> 
   <td> 仅从内存中删除变量x，y和z。 </td> 
  </tr> 
  <tr> 
   <td> c </td> 
   <td> 清除命令窗口 </td> 
  </tr> 
  <tr> 
   <td> 出口 </td> 
   <td> 检查文件或变量的存在 </td> 
  </tr> 
  <tr> 
   <td> 全球 </td> 
   <td> 声明变量为全局变量 </td> 
  </tr> 
  <tr> 
   <td> 退出 </td> 
   <td> 停止Matlab </td> 
  </tr> 
  <tr> 
   <td> WHO </td> 
   <td> 列出当前变量 </td> 
  </tr> 
  <tr> 
   <td> 谁是 </td> 
   <td> 列出当前变量 </td> 
  </tr> 
 </tbody> 
</table>

### 特殊变量和常量 **(**Special variables and constants**)** ###

<table> 
 <tbody> 
  <tr> 
   <td>ans</td> 
   <td>Most recent answer</td> 
  </tr> 
  <tr> 
   <td>eps</td> 
   <td>Accuracy of floating point precision</td> 
  </tr> 
  <tr> 
   <td>i,j</td> 
   <td>The imaginary unit</td> 
  </tr> 
  <tr> 
   <td>Inf</td> 
   <td>Infinity</td> 
  </tr> 
  <tr> 
   <td>NaN</td> 
   <td>Undefined numerical result</td> 
  </tr> 
  <tr> 
   <td>pi</td> 
   <td>The number 22/7</td> 
  </tr> 
 </tbody> 
</table>

<table> 
 <tbody> 
  <tr> 
   <td> 安斯 </td> 
   <td> 最新答案 </td> 
  </tr> 
  <tr> 
   <td> eps </td> 
   <td> 浮点精度精度 </td> 
  </tr> 
  <tr> 
   <td> ， </td> 
   <td> 虚数单位 </td> 
  </tr> 
  <tr> 
   <td> 信息 </td> 
   <td> 无限 </td> 
  </tr> 
  <tr> 
   <td> N </td> 
   <td> 未定义的数值结果 </td> 
  </tr> 
  <tr> 
   <td> pi </td> 
   <td> 数22/7 </td> 
  </tr> 
 </tbody> 
</table>

### 显示格式 **(**Display formats**)** ###

<table> 
 <tbody> 
  <tr> 
   <td>Command</td> 
   <td>Description</td> 
   <td>Example</td> 
  </tr> 
  <tr> 
   <td>format short</td> 
   <td>Fixed-point with 4 decimal digits for:<br>0.001&lt;=number&lt;=10000<br>Otherwise display format short e.</td> 
   <td>&gt;&gt; 290/7 <br>= 41.4286</td> 
  </tr> 
  <tr> 
   <td>format long</td> 
   <td>Fixed-point with 14 decimal digits for:<br>0.001&lt;=number&lt;=100<br>Otherwise display format long e.</td> 
   <td>&gt;&gt; 290/7 <br>= 41.42857142857143</td> 
  </tr> 
  <tr> 
   <td>format short e</td> 
   <td>Scientific notation with 4 decimal digits.</td> 
   <td>&gt;&gt;290/7 <br>= 4.1429e+001</td> 
  </tr> 
  <tr> 
   <td>format long e</td> 
   <td>Scientific notation with 15 decimal digits</td> 
   <td>&gt;&gt;290/7 <br>= 4.142857142857143e+001</td> 
  </tr> 
  <tr> 
   <td>format short g</td> 
   <td>Best of 5-digits fixed or floating point.</td> 
   <td>&gt;&gt;290/7 <br>= 41.429</td> 
  </tr> 
  <tr> 
   <td>format long g</td> 
   <td>Best of 15 digit fixed or floating point.</td> 
   <td>&gt;&gt;290/7 <br>= 41.428571428574</td> 
  </tr> 
  <tr> 
   <td>format bank</td> 
   <td>Two decimal digits</td> 
   <td>&gt;&gt;290/7 <br>= 41.43</td> 
  </tr> 
 </tbody> 
</table>

<table> 
 <tbody> 
  <tr> 
   <td> 命令 </td> 
   <td> 描述 </td> 
   <td> 例 </td> 
  </tr> 
  <tr> 
   <td> 短格式 </td> 
   <td> 具有4个十进制数字的定点用于： <br> 0.001 &lt;=数字&lt;= 10000 <br> 否则，显示格式为短e。 </td> 
   <td> &gt;&gt; 290/7 <br> = 41.4286 </td> 
  </tr> 
  <tr> 
   <td> 格式化长 </td> 
   <td> 具有14个十进制数字的定点用于： <br> 0.001 &lt;=数字&lt;= 100 <br> 否则显示格式为long e。 </td> 
   <td> &gt;&gt; 290/7 <br> = 41.42857142857143 </td> 
  </tr> 
  <tr> 
   <td> 格式短E </td> 
   <td> 具有4个十进制数字的科学计数法。 </td> 
   <td> &gt;&gt; 290/7 <br> = 4.1429e + 001 </td> 
  </tr> 
  <tr> 
   <td> 格式化长e </td> 
   <td> 具有15个十进制数字的科学计数法 </td> 
   <td> &gt;&gt; 290/7 <br> = 4.142857142857143e + 001 </td> 
  </tr> 
  <tr> 
   <td> 格式化短g </td> 
   <td> 5位固定或浮点数中的最佳值。 </td> 
   <td> &gt;&gt; 290/7 <br> = 41.429 </td> 
  </tr> 
  <tr> 
   <td> 格式化长g </td> 
   <td> 15位固定点或浮点中的最佳值。 </td> 
   <td> &gt;&gt; 290/7 <br> = 41.428571428574 </td> 
  </tr> 
  <tr> 
   <td> 格式库 </td> 
   <td> 两位十进制数字 </td> 
   <td> &gt;&gt; 290/7 <br> = 41.43 </td> 
  </tr> 
 </tbody> 
</table>

### 输入/输出和格式化命令 **(**Input/output and formatting commands**)** ###

<table> 
 <tbody> 
  <tr> 
   <td>disp</td> 
   <td>Displays contents of an array or string.</td> 
  </tr> 
  <tr> 
   <td>fscanf</td> 
   <td>Read formatted data from a file.</td> 
  </tr> 
  <tr> 
   <td>format</td> 
   <td>Controls screen-display format.</td> 
  </tr> 
  <tr> 
   <td>fprintf</td> 
   <td>Performs formatted writes to screen or files.</td> 
  </tr> 
  <tr> 
   <td>input</td> 
   <td>Displays prompts and wait for input</td> 
  </tr> 
  <tr> 
   <td>;</td> 
   <td>Supresses screen printing.</td> 
  </tr> 
 </tbody> 
</table>

<table> 
 <tbody> 
  <tr> 
   <td> 显示 </td> 
   <td> 显示数组或字符串的内容。 </td> 
  </tr> 
  <tr> 
   <td> fscanf </td> 
   <td> 从文件中读取格式化的数据。 </td> 
  </tr> 
  <tr> 
   <td> 格式 </td> 
   <td> 控制屏幕显示格式。 </td> 
  </tr> 
  <tr> 
   <td> fprintf </td> 
   <td> 执行对屏幕或文件的格式化写入。 </td> 
  </tr> 
  <tr> 
   <td> 输入 </td> 
   <td> 显示提示并等待输入 </td> 
  </tr> 
  <tr> 
   <td> ; </td> 
   <td> 禁止丝网印刷。 </td> 
  </tr> 
 </tbody> 
</table>

In the same way, there are various commands present in MATLAB like commands on the array, special matrices, matrix arithmetic as well as matrix commands for solving linear equations along with plotting commands which is basic XY plotting on x and y axis for graphical use.

以同样的方式，MATLAB中存在各种命令，例如数组上的命令，特殊矩阵，矩阵算术以及用于求解线性方程的矩阵命令，以及绘制命令，这是在x和y轴上进行图形化的基本XY绘制。

So, MATLAB is full of command which is much more along with the insertion of tables, chats, and colors also, as it can also simulate the function created by a person.

因此，MATLAB充满了命令，其中不仅包含表格，聊天和颜色的插入，而且还可以模拟人创建的功能。

**Example:**

**例：**

Need to determine the number of years and months that correspond to t. Way to input commands in MATLAB is shown below,

需要确定与t对应的年数和月数。 在MATLAB中输入命令的方式如下所示，

>>p = 5000; r = 0.085; ta = 17; n = 12;
        
        >>b=p*(1+r)^ta
            b=
            2.0011e+004
        
        >>t=log(b/p)/(n*log(1+r/n))
            t=
            16.3737
        
        >>year = fix(t)
            Years =
            16
        
        >>months=ceil((t-years)*12)
            Months=
            5

Above is shown how to determine the number of years and months that corresponds to **t**.

上面显示了如何确定与**t**对应的年数和月数。

> 翻译自: [https://www.includehelp.com/matlab/commands.aspx][https_www.includehelp.com_matlab_commands.aspx]

matlab中输出命令

[https_www.includehelp.com_matlab_commands.aspx]: https://www.includehelp.com/matlab/commands.aspx