can anyone explain me this code??

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0 个投票

x5;
x8=load('hearttest.txt');
c4=size(x8)*[1;0];%calculating size of matrix.
u1=size(x8)*[0;1];
x6=x8;
%==========================================================
per=80;
per1=20;
al=0.1;
pe=per/100;
v=round(pe*c3);
%==========================================================
% 
%==================================================================
%separating the input attributes and the target from the input file
%==================================================================
%Reading input in an array
for s1=1:m
  for i=1:c3
      if(x5(i,u)==(s1-1))
          for(j=1:u)
              temp=x5(s1,j);
              x5(s1,j)=x5(i,j);
              x5(i,j)=temp;
          end
      end    
  end
end
%==================================================================
%==================================================================
%TARGET CLASS vectors
%
for i=1:c3
  for j=1:u
      if((j==u))
          t(i)=x5(i,j);
      end
  end
end
%==================================================================
for i=1:c3
  for j=1:u-1
      x(i,j)=x5(i,j);
  end
end
%==================================================================
%INPUT vectors
for i=1:c3
  for j=1:u-1
      if x(i,j)==0
          x(i,j)=.05;
      end
  end
end
%==================================================================
%==================================================================
%Normalizing the datas.
q2=size(x)*[0;1];
p2=size(x)*[1;0];
y=max(x,[],1);
z=min(x,[],1);
for i=1:q2
  if y(i)~=z(i)
      e(i)=y(i)-z(i);
  else
      e(i)=1;
      z(i)=0;
  end
end
for i=1:p2
  for j=1:q2            
      x(i,j)=(x5(i,j)- z(j))/(e(j));
  end
end
x8;
q5=size(x8)*[0;1];
p5=size(x8)*[1;0];
y=max(x8,[],1);
z=min(x8,[],1);
for i=1:q5
  if y(i)~=z(i)
      e(i)=y(i)-z(i);
  else
      e(i)=1;
      z(i)=0;
  end
end
for i=1:p5
  for j=1:q5            
      x8(i,j)=(x8(i,j)- z(j))/(e(j));
  end
end
x8;
%==================================================================
%==================================================================
%STEP1:
%Initialising then weight matrix.
%==================================================================
for i=1:u-1
  for j=1:4
      w(i,j)=x(j,i);
  end
end

2 个评论
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Azzi Abdelmalek 2013-2-27

Can your question be more precise? because I don't see how is it possible to explain all these lines of code.

chinmay 2013-2-27

the thing is i have one project called HEART ANALYSIS USING NEURAL NETWROK.....but i dont understand in that how they train the data by neural network?????

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