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「平学(43):Matlab 入门学习之矩阵运算」
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"Ping Xue(43):Matlab introductory study of matrix operations(2) "
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一、思维导图( Mind mapping )
二、学习过程( Learning process )
1. 构建矩阵( Build a matrix )
在构建矩阵的过程中,需要用到英文字符的中括号「[ ]」和分号「;」,两个数之间插入空格代表同一行,插入分号代表进入下一列。小编在此处构建了一个矩阵,具体如下图所示:
In the process of constructing the matrix, you need to use the English characters in brackets 「[ ]」 and semicolon 「;」, insert a space between the two numbers on behalf of the same line, insert a semicolon on behalf of the next column. I have constructed a matrice here, as shown below:
2. max 函数( max function )
该函数用于列举矩阵每列最大值,具体效果如下图所示:
The function is used to list the maximum value of each column of the matrix, the specific effect is shown below:
3. sum 函数(sum function )
该函数用于计算矩阵每列和,具体效果如下图所示:
The function is used to calculate the matrix sum of each column, the specific effect is shown below:
4. mean 函数(mean function )
该函数用于列举矩阵每列均值,具体效果如下图所示:
The function is used to enumerate the mean value of each column of the matrix, the specific effect is shown below:
5. sort 函数(sort function )
该函数用于对每列数值进行排序,具体效果如下图所示:
The function is used to sort the values in each column, the specific effect is shown below:
6. sortrows 函数(sortrows function )
该函数用于依照第一列的数从小到大排序行,具体效果如下图所示:
The function is used in accordance with the first column of the number of small to large sorting line, the specific effect is shown in the figure below:
7. length 函数(length function )
length 函数用于显示矩阵最大维度的长,具体效果如下图所示:
length function is used to display the maximum dimension of the matrix length, the specific effect is shown below:
8. eye 函数(eye function )
该函数用于生成单位矩阵,具体效果如下图所示:
This function is used to generate the unit matrix, the specific effect is shown below:
9. zeros 函数(zero function )
该函数用于生成a行b列的零矩阵,具体效果如下图所示:
The function is used to generate a row b column zero matrix, the specific effect is shown below:
10. ones 函数(ones function )
该函数用于生成a行b列的单位矩阵,具体效果如下图所示:
The function is used to generate a row b column unit matrix, the specific effect is shown below:
11. diag 函数(diag function )
该函数用于指定对角线上的函数,具体效果如下图所示:
This function is used to specify the function on the diagonal, the specific effect is shown below:
12. 读取特定位置的元素(Retrieve the element at a specific location )
可通过直接访问矩阵行列来读取特定值,具体效果如下图所示:
Specific values can be read by directly accessing the matrix rows and columns as shown below:
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