Values in the loop are overwritten

Hello sir ..my code is:

for i=1:1:4; S=M(1:1,i)./20; valueOfB(j)=S; end

I should get 4 different values of S. But same value i am getting four times. Where M is taken for frames 1 to 25...26 to 50 ...51 to 75 and so on.and for M i am getting correct values. And j = 1:25:100.

Thanks in advance.

[Guillaume]

Inside your for i loop, j is constant, so you're always going to overwrite ValueOfB.

Note that 1:1 is simply 1, so M(1:1, i) is simply M(1, i) and if M is a vector, then it's simply M(i).

You will have to explain in more details what you're doing and probably show more code.

At the moment, your whole loop is equivalent to:

ValueOfB(j) = M(1, 4) / 20;  %don't know what j is, but it doesn't matter

[swati mane]

Thank you sir for your help. I understood whats happens in the code.

j is constant therefore value is overwritten. That j value is j= 1:25:100 but this j is out of the for loop. therefore, every time j is 1 and the value is overwriting. How to increase the vaue of j for each step. Should I modfiy my code like this?

for i=1:1:4;

S=M(1:1,i)./20;

valueOfB(j)=S;

j=j+1;

end

[KALYAN ACHARJYA]

It's OK, minor modification

valueOfB=zeros(1,4);
for i=1:1:4
    valueOfB(i)=M(1,i)/20;
end 

Or

valueOfB=M(1,1:4)./20; % Without loop

[swati mane]

Yes its working.thanks a lot @ kalyan acharjya