MATLAB: Generalization of nth index

indexing

I want to create a 1*n vector A, where each successive element is square of previous. Now if i write A(n)=(A(n-1))^2 Matlab takes n as the last element. Is there a way to generalize n? Or any other way to get such a vector? Thanks.

Best Answer

It looks like you’re doing this in a loop. The solution is to add one to the vector in each iteration:

N = 5;
A = 2;
for n = 1:N
    A(n+1) = A(n)^2;
end

Note that unless you begin with some value greater than 1, you end up with ‘A=[1,1,1,...]’.

Related Solutions

MATLAB: While loop for sum

n = 1;
while true
  do something
  n = n + 1;
  if n > N; break; end
end

n = 0;
while true
  n = n + 1;
  if n > N; break; end
  do something
end

n = 1;
while true
  do something
  if n >= N; break; end
  n = n + 1;
end

n = 1;
while n <= N
   do something
   n = n + 1;
end

n = 0;
while true
   if n > N; break; end
   n = n + 1;
   do something
end

MATLAB: Generalization of Catalan’s conjecture

You may explore File Exchange for solutions or related code from which you can build your own solution.

If you are attempting to come up with your own algorithm, have a look at 'factorIntegerPower'

https://in.mathworks.com/help/symbolic/factorintegerpower.html

You can use that to find all the perfect powers in a given sequence of numbers as follows:

a = 1:100;
b = findIntegerPower(a);
result = a(a~=b);   % +result is a row vector containing all the perfect powers in the given range.

This can be a starting point for your solution.

Hope it helps!

Best Answer

Related Solutions

MATLAB: While loop for sum

MATLAB: Generalization of Catalan’s conjecture

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