[数据结构与算法]【MATLAB基础】多维数组

>> z(1,1,1,1)=2;
z(1,1,1,2)=4;
whos z
  Name      Size               Bytes  Class     Attributes

  z         1x1x1x2               16  double  

多维下标和线性下标的变换

%多维下标变换到线性下标
>> dim1 = 2;
>> dim2 = 4;
>> m = zeros(12,9);
>> sub2ind(size(m),dim1,dim2)
ans =
    38
%线性下标变换到多维下标
>> [dim1t dim2t] = ind2sub(size(m),38)
dim1t =
     2
dim2t =
     4

采用高维数组的下标变换实现更方便的并行计算

dim1 = 100;
dim2 = 200;
dim3 = 300;
z = zeros(dim1,dim2,dim3);
sz = [dim1 dim2 dim3];
parfor ii = 1 : dim1*dim2*dim3
    [tdim1, tdim2, tdim3] = ind2sub(sz,ii);
end