for i = 1:nclass,%1 inx_i = find(class== Numclass(i));%2 Xki = Vector(:,inx_i);%3 Dki = DW(:,inx_i);%4 sum(Dki); %5 M(i,:)=sum(Dki*Xki');%6 meanclass(i) = Numclass(i); %7end in this code meaning of 3rd n 4th line, n can we use ',' after for

Question

Kanwal Kaur 2016-11-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/313236-for-i-1-nclass-1-inx_i-find-class-numclass-i-2-xki-vector-inx_i-3-dki-dw-in

编辑： Walter Roberson 2016-11-21

for i = 1:nclass,%1  
 inx_i = find(class== Numclass(i));%2
   Xki = Vector(:,inx_i);%3  
Dki = DW(:,inx_i);%4   
sum(Dki); %5  
M(i,:)=sum(Dki*Xki');%6
  meanclass(i) = Numclass(i); %7
end

in this code meaning of 3rd n 4th line, n can we use ',' after for loop? line number 6th means that every ith row of M will store sum of product of Dki and Xki ??

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KSSV 2016-11-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/313236-for-i-1-nclass-1-inx_i-find-class-numclass-i-2-xki-vector-inx_i-3-dki-dw-in#answer_244095

在 MATLAB Online 中打开

for i = 1:nclass,%1 
    inx_i = find(class== Numclass(i));%2 
    Xki = Vector(:,inx_i);%3 Extracting the column inx_i from matrix Vector
    Dki = DW(:,inx_i); %4 Extracting the column inx_i from DW
    sum(Dki); %5 
    M(i,:)=sum(Dki*Xki');%6 Dki*Xki' will be a matrix, sum(Dki*Xki') results into a array
    meanclass(i) = Numclass(i); %7 
end
% in this code meaning of 3rd n 4th line, n can we use ',' after for loop? 
% line number 6th means that every ith row of M will store sum of product of Dki and Xki ??

I suggest you to run the code and use debugging option. When you put debugging point, your code will stop at the point and you can check the dimensions of every variable of the code. Read about debugging matlab code.