I have to compile the function but my matrix dimensions are not equal.

clear all close all clc

t=-10:0.1:10; w=input('enter the value of w'); b=input('enter the value for b'); f=zeros(1,length(t));

for i=1:length(t)

 f(i)=f+(1./(1+exp(w(i).*t(i)+b(i))));

end

[Phillip]

Hi

You are looping over w(i) and b(i). Are they suppose to be vectors or scalars?

Regards, Phillip

[Mariam 123]

They are scalers

[Mariam 123]

If suppose I don't even include them in looping , i am getting again the error which is "??? In an assignment A(I) = B, the number of elements in B and I must be the same. "

[Phillip]

I was trying to point out that in the code above w and b are scalars but you are treating them like vectors (w(i) & b(i)) in the for loop.

If they are suppose to be scalars then the answer below is what you are looking for. If not, then you need to be a bit more clear on what the inputs are

[Mariam 123]

I havn't used cumsum function,so therefore I was trying to do through looping. but in looping I am only getting the error of dimensions

Answer 1

[Andrei Bobrov]

t = -10:0.1:10; 
w = input('enter the value of w = '); 
b = input('enter the value for b = ');
f = cumsum(1./( 1 + exp(w*t + b) ));

[Mariam 123]

Thankyou but I want to do it through looping.

Do looping and cumsum bring same ans ?? I havn't used cumsum.. Its commulative sum

[Mariam 123]

f = cumsum(alpha.*(1./( 1 + exp(w*t + b) ))) can i add alpha as multiplier in cumsum function like upper i did????