3楼: Originally posted by roxannelj at 2012-03-06 17:46:24:
谢谢lurencyj，从程序中看二维数据data_2d是dim1*dim2，抱歉我的表述有问题，其实我的问题是我有个三维数据data(x,y,λ),其中x，y是像素点的坐标，λ是波长信息，现在我需要unfold这个三维数据成二维数据data2(( ...

dim1 = 2;
dim2 = 3;
dim3 = 2;
data_3d = ones(dim1, dim2, dim3);
data_3d(:) = 1:dim1*dim2*dim3
data_2d = ones(dim1*dim2, dim3)
newData_3d = data_3d;

for i=1:dim1*dim2
        ix = floor((i-1)/dim2);
        iy = mod(i-1,dim2);     % i=2 => ix=1 & iy=2 & iz=1
        ix = ix + 1
        iy = iy + 1

        for j = 1:dim3
                data_2d(i, j) = data_3d(ix,iy,j);
        end
end

for i=1:dim1*dim2
        ix = floor((i-1)/dim2);
        iy = mod(i-1,dim2);     % i=2 => ix=1 & iy=2 & iz=1
        ix = ix + 1
        iy = iy + 1

        for j = 1:dim3
                newData_3d(ix,iy,j) = data_2d(i, j);
        end
end

楼: Originally posted by lurencyj at 2012-03-06 17:13:59:
已经测试过：

dim1 = 2;
dim2 = 3;
dim3 = 2;
data_3d = ones(dim1, dim2, dim3);
data_3d( = 1:dim1*dim2*dim3
data_2d = ones(dim1*dim2, dim3)
newData_3d = data_3d;

for i=1:dim1*dim2
        ix = ...