Matlab数组转换技巧：掌握三种不同类型数组间的高效互转方法

三种数组是&＃xff1a;数值型矩阵&＃xff0c;字符数组(或字符串)&＃xff0c;单元数组(也有叫元胞数组)

1、数值型矩阵转换为字符数组(num2str、mat2str)

>> A&＃61;[1,2,3;4,5,6];

>> B&＃61;num2str(A)

B &＃61;

1  2  3

4  5  6

>> whos

Name      Size            Bytes  Class     Attributes

A         2x3                48  double

B         2x7                28  char

2、字符数组转换为数值型(str2num<4位精度>、str2double)

>> B&＃61;[&＃39;123.34&＃39;];

>> A&＃61;str2num(B)

A &＃61;

123.3400

>> whos

Name      Size            Bytes  Class     Attributes

A         1x1                 8  double

B         1x6                12  char

3、单元数组转换为字符数组(cell2mat)&＃xff1a;

例如&＃xff1a;

>> A&＃61;{&＃39;sfjsdlgksdgjlsdjgkl&＃39;};

>> B&＃61;cell2mat(A)

B &＃61;

sfjsdlgksdgjlsdjgkl

>> whos

Name      Size            Bytes  Class    Attributes

A         1x1                98  cell

B         1x19               38  char

4、字符数组转换为单元数组(cellstr)

>> A&＃61;[&＃39;what&＃39;;&＃39;edit&＃39;;&＃39;play&＃39;];%注意&＃xff1a;用A&＃61;[]生成字符数组是&＃xff0c;必须保证每行有相同的长度&＃xff0c;不够可用空格补

>> B&＃61;cellstr(A)

B &＃61;

&＃39;what&＃39;

&＃39;edit&＃39;

&＃39;play&＃39;

>> whos

Name      Size            Bytes  Class    Attributes

A         3x4                24  char

B         3x1               204  cell

5、单元数组转换为数值型矩阵

>> A&＃61;{&＃39;123.4&＃39;};

>> B&＃61;cell2mat(A)

B &＃61;

123.4

>> C&＃61;str2num(B)

C &＃61;

123.4000

>> whos

Name      Size            Bytes  Class     Attributes

A         1x1                70  cell

B         1x5                10  char

C         1x1                 8  double

6、数值型矩阵转换为单元数组(num2cell)

>> A&＃61;[1,2,3;4,5,6];

>> B&＃61;num2cell(A)

B &＃61;

[1]    [2]    [3]

[4]    [5]    [6]

>> whos

Name      Size            Bytes  Class     Attributes

A         2x3                48  double

B         2x3               408  cell