How to automatically add variables to a matrix with each iteration?

I have code that solves an equation and checks against a known value until the error is with in tolerance.

I would like to add the "n" and "error" variables for each iteration to a matrix as they are calculated every time the script loops.

I am guessing I need to add a line right before the end that would append a matrix but I cant seem to locate the necessary syntax.

Thank you.

EX:

n error
1 30.12
2 28.43
3 25.83
etc...

MY CODE:

    n = 1; 
    error = 100;

    Strue = (pi^2)/6;
    Scalc = 1/(n^2);

while error > 0.001
  n = n+1;
  Scalc = Scalc + (1/(n^2)); 
  error = 100*((abs(Strue-Scalc))/Strue);

end

Answer 1

[Andrei Bobrov]

Strue = (pi^2)/6;
Scalc = 0;
n = 1;
error1 = 1;
while error1 > 0.001
    Scalc = Scalc + (1/(n^2));
    error1 = 100*((abs(Strue-Scalc))/Strue);
    errors(n,:) = [n,error1];
    n = n+1;
end

Answer 2

[Image Analyst]

You are adding to n each iteration. You could add up error also by doing the same thing:

theError = theError + 100*((abs(Strue-Scalc))/Strue);

Don't use error because you'd override the built in error function. Use a different name instead, like theError.

I'm not sure what you mean by "append a matrix" but in general you do it like this

myMatrix = [myMatrix appendedValue]; % Append appendedValue to myMatrix.