MATLAB: Help with For End loop

desperatefor end loophomeworkloopnew to matlab

Use a For-end loop in a script file to calculate the sum of the first n terms of the series:

Summation sign on the top n bottom k=1 : ((-1)^k * k^2 +5k)/3^k Show the script file and the two results of n = 10 and n = 20.

WHAT IS THIS I DONT UNDERSTAND LOOPS HELP PLEASE IM BEGGING!!!. x.x

Best Answer

n=10;
theSum = 0;
for k = 1 : n
  theSum =

OK, that should be enough hint for you to finish your homework.

Related Solutions

MATLAB: Help with Homework please Loops are hard

So, in the first case, you have to add 10 numbers together. In the second case, you have to add 20 numbers together. I'm sure you know how to add numbers together, so don't be intimidated by the loop.

In my opinion, the natural way to do this sum is with a "for" loop:

total = 0;
for k=1:n
  total = total + ((-1)^k * k^2 +5*k)/3^k;
end

However, you have been told to do this with a "while" loop. Therefore, it is equivalent to write:

total = 0;
k=1;
while k <= n
  total = total + ((-1)^k * k^2 +5*k)/3^k;
  k = k+1;
end

All you have to do is define "n" as required.

MATLAB: Setting up vector function

In your for loop, you are using k(k1+1). if k1 is the last element of k, then k(k1+1) will be exceeding the dimension of k. If you dont care about the last term, use

 for k1 = 1:n-1
     ... Stuff ...
 end
 d(n) = k(n);

or if you need the other vectors to go to n, stick it in a conditional

 for k1 = 1:n
     ... Other Stuff ...
     if k1~=n
         d = (k(k1)+k(k1+1))*ones(n,1);
     end
 end

Best Answer

Related Solutions

MATLAB: Help with Homework please Loops are hard

MATLAB: Setting up vector function

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