Conditional Loop not executing properly

So I am trying to build a loop that will calculate a problem for me. The problem being that for a range of certain x values I need a coefficient to equal something and at the other x values, the coefficient will equal something else. My loop won't run at all if I add an else statement(basically a catch-all to return an error) and when I take it off it won't calculate the values for the first condition.

t=[0:1:6];
r=zeros(1,length(t));
r(1)=0;
for i=1:(length(t))
  if t(i) < 2
      b(i)=1;
  elseif t(i) >= 2
      b(i)=150;
  x(i)=(b(i)*r(i))+20;
  r(i+1)=r(i)+x(i);
  fprintf('%.4f   %.2f\n',t(i),r(i))
  end
end

I don't know what I'm doing wrong

[jonas]

Me neither, it's running fine for me.

b =

     1     1   150   150   150   150   150

I am wondering if one end is misplaced though

t=[0:1:6];
r=zeros(1,length(t));
r(1)=0;
for i=1:(length(t))
  if t(i) < 2
      b(i)=1;
  elseif t(i) >= 2
      b(i)=150;
  end
  x(i)=(b(i)*r(i))+20;
  r(i+1)=r(i)+x(i);
  fprintf('%.4f   %.2f\n',t(i),r(i))

end

[Walter Roberson]

You probably want the end after the assignment of 150. MATLAB does not use spacing to indicate control level

[Star Strider]

Your code runs without error for me.

Please also post the version that does not run.

What result do you want from it? (Please provide an example.)

[Gwen Plato]

Your suggestion worked Walter, thanks