Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-3.

Hi part of mi code is shown below:

for I = 1:10+1
    w2(i,1)= w2(i,1)+n.*delta2.*Y1(i)
end

i am getting the error as mentioned in the title, can someone please help me

[jonas]

The error message is quite clear. The error is related to the variable size. No one can help you since we do not know the size of your variables.

[madhan ravi]

I second jonas , nobody can read your mind please upload all the necessary details

[Adam]

Debug your code. It is one of those error messages that is completely self-explanatory!

[Stephen23]

It comes down to this:

w2(i,1)+n.*delta2.*Y1(i)

w2(i,1) refers to a sclar, as does Y1(i). So one (or both) of n and delta2 must be non-scalar. Check the sizes of your variables.

Answer 1

[madhan ravi]

for i = 1:10+1
    w2(i,:)= w2(i,1)+n.*delta2.*Y1(i)
end

[madhan ravi]

if right side is 1 by 3 then you could save the row vector indices as such w2(i,:)

[madhan ravi]

an example to illustrate:

>> 
x=[1:3]
y=[3:6]
n=[1:3]
for i=1:3

      outp(i,:)=x(i).*y(i).*(n);

end

x =

       1     2     3

y =

       3     4     5     6

n =

       1     2     3

>> outp

outp =

       3     6     9
       8    16    24
      15    30    45

>>

[madhan ravi]

>> 
x=[1:3]
y=[3:6]
n=[1:3]
for i=1:3

      outp(i,1)=x(i).*y(i).*(n);

end

x =

       1     2     3

y =

       3     4     5     6

n =

       1     2     3

Unable to perform assignment because the size of the
left side is 1-by-1 and the size of the right side is
1-by-3.

>>

[madhan ravi]

see the latter comment thats the issue you are facing

[madhan ravi]

Reason: You are trying to store 3 elements in the place of 1 so if you use (i,:) which means it takes the iterator as index and can contain n number of elements as columns

[Valerie Cala]

thank you so much for your time, it was very clear, my code is working now :)

[madhan ravi]

Anytime , make sure to accept the answer if it worked so that other people know the question is solved else let know whats additionally required