矩阵合并拼接

1.横向拼接

[a,b] [a b]均可

例1

>> a=magic(3)a =8     1     63     5     74     9     2>> b=rand(3)b =0.6324    0.5469    0.15760.0975    0.9575    0.97060.2785    0.9649    0.9572>> c=[a,b]c =8.0000    1.0000    6.0000    0.6324    0.5469    0.15763.0000    5.0000    7.0000    0.0975    0.9575    0.97064.0000    9.0000    2.0000    0.2785    0.9649    0.9572>> d=[a b]d =8.0000    1.0000    6.0000    0.6324    0.5469    0.15763.0000    5.0000    7.0000    0.0975    0.9575    0.97064.0000    9.0000    2.0000    0.2785    0.9649    0.9572

2.纵向拼接

[a;b]

例2

>> aa =8     1     63     5     74     9     2>> bb =0.6324    0.5469    0.15760.0975    0.9575    0.97060.2785    0.9649    0.9572>> [a;b]ans =8.0000    1.0000    6.00003.0000    5.0000    7.00004.0000    9.0000    2.00000.6324    0.5469    0.15760.0975    0.9575    0.97060.2785    0.9649    0.9572

元胞数组合并拼接

1.使用数组串联运算符[]串联元胞数组。中括号不仅仅能用于矩阵的合并。

例1

>> a={1,2,3};
>> b={'f','n','k'};
>> c={'gh',4,[2 3]};
>> d=[a,b,c]d =1×9 cell 数组{[1]}    {[2]}    {[3]}    {'f'}    {'n'}    {'k'}    {'gh'}    {[4]}    {1×2 double}>> e=[a b c]e =1×9 cell 数组{[1]}    {[2]}    {[3]}    {'f'}    {'n'}    {'k'}    {'gh'}    {[4]}    {1×2 double}>>  f=[a;b;c]f =3×3 cell 数组{[ 1]}    {[2]}    {[       3]}{'f' }    {'n'}    {'k'       }{'gh'}    {[4]}    {1×2 double}

可以看出与矩阵的合并并无二致。

2.使用元胞数组构造运算符构造一个嵌套元胞数组

>> g={a;b;c}g =3×1 cell 数组{1×3 cell}{1×3 cell}{1×3 cell}>> g{1,1}ans =1×3 cell 数组{[1]}    {[2]}    {[3]}

不要把元胞数组的合并与嵌套混淆。

参考文献

[1]https://jingyan.baidu.com/article/4ae03de3e064df3efe9e6b42.html

[2]https://ww2.mathworks.cn/help/matlab/matlab_prog/combine-cell-arrays.html?ue