MATLAB is
fastest
和
easiest
when you stick with using numeric arrays and learn how to use the
dimensions
of the arrays, rather than sticking data in complicated data classes like cell arrays and structures. (most importantly this includes learning how to write
矢量化代码
). If you use the
第三
数组的维度，那么您的问题很容易使用
意思是
:
>> X(:,:,3) = [1,2;3,4];
>> X(:,:,2) = [5,6;7,8];
>> X(:,:,1) = [9,0;1,2];
>> mean(X,3)
ans =
5.0000 2.6667
3.6667 4.6667
The
最好的
solution is to create your
n
matrices in this single numeric array. The second best solution is to create your arrays inside a cell array, which can then be concatenated together like this:
>> y {3} = [1,2; 3,4];
>> Y{2} = [5,6;7,8];
>> Y{1} = [9,0;1,2];
>> X = cat(3,Y{:})
>> mean(X,3)
You will find that the
X
与第一个示例相同。
The one method you should
not
使用是动态创建
n
matrices as individual variables (e.g. sequentially numbered) and then attempt to join them together:
creating variable names dynamically is buggy, slow and a very poor programming practice
.
