What does the matlab code in steps 2 and 3 mean?
1 次查看(过去 30 天)
显示 更早的评论
1.Hphi=Heaviside(phi,epsilon);
2.M(:,:,1)=Hphi;
3.M(:,:,2)=1-Hphi;
4.N_class=size(M,3);
0 个评论
回答(1 个)
Wayne King
2012-7-29
编辑:Wayne King
2012-7-29
M is a 3-D matrix.
M(:,:,1) = Hphi;
Means set the first "page" of the 3rd dimension equal to the output of Heaviside with inputs phi and epsilon, which here is Hphi.
M(:,:,2) = 1-Hphi;
Means set the second "page" of the 3rd dimension equal to 1-Hphi.
In general, M(:,:,index) is the way of assigning all rows and all columns of the index-th page of a 3D matrix a given value.
For example:
M = zeros(2,2,2); % M is 2x2x2
M(:,:,1) = 1;
M(:,:,2) = 2;
Now M(:,:,1) is a 2x2 matrix of ones and M(:,:,2) is a 2x2 matrix of 2s.
N_class = size(M,3);
Is just returning the size of M in the 3rd dimension
M = ones(2,2,4);
size(M,3)
Are you trying to read the Matlab documentation?
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!