??? In an assignment A(I) = B, the number of elements in B and I must be the same.

1 次查看（过去 30 天）
baby
baby 2012-5-11
hello,,
i need help becoz something's wrong with my code,,
please help me,,
that error show that -->>
??? In an assignment A(I) = B, the number of elements in B and I must be the same.
Error in ==> w1(i)=w1(i)+dw1(i);
please help me,,
this is my homework and i must collect it tomorrow,,
my Code
p1=[0 1 0 2];
p2=[0 1 0 2];
t=[1 1 1 0];
%Weight
w1=0;
w2=0;
b=1;
teta=0;
w1new=1;
%Iteration
for j=1:3
for i=1:5
%Calculate n
n(i)=w1*p1(i)+w2*p2(i)+b;
%Calculate Output
if n(i)>teta
a(i)=1;
else
a(i)=0;
end
%calculate error value
error(i)= t(i) - a(i);
dw1(i)=error(i)*p1(i);
dw2(i)=error(i)*p2(i);
db{i}=error(i);
w1(i)=w1(i)+dw1(i);
w2(i)=w2(i)+dw2(i);
b(i)=b(i)+db{i};
end
end
disp(['P1 : ',num2str(p1)]);
i dont know what's wrong with my code,,,
please help me :(
  4 个评论
显示 2更早的评论
Daniel Shub
Daniel Shub 2012-5-11
Over writing MATLAB functions with variables (e.g., i, j, error, and db) is bad style and can lead to all sort of problems.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2012-5-11
I have no idea what this does, or if my "fix" below is what you want, but at least it runs. You didn't initialize p1 and p2 to have the required 5 elements, and you didn't use w1 and w2 as matrices everywhere.
p1=[0 1 0 2 0];
p2=[0 1 0 2 0];
t=[1 1 1 0 0];
%Weight
w1 = zeros(1,5);
w2= zeros(1,5);
b= ones(1, 5);
teta=0;
w1new=1;
%Iteration
for j=1:3
for i=1:5
%Calculate n
n(i)=w1(i)*p1(i)+w2(i)*p2(i)+b(i);
%Calculate Output
if n(i)>teta
a(i)=1;
else
a(i)=0;
end
%calculate error value
error(i)= t(i) - a(i);
dw1(i)=error(i)*p1(i);
dw2(i)=error(i)*p2(i);
db{i}=error(i);
w1(i)=w1(i)+dw1(i);
w2(i)=w2(i)+dw2(i);
b(i)=b(i)+db{i};
end
end
disp(['P1 : ',num2str(p1)]);

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Get Started with MATLAB 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by