MATLAB: ??? Subscript indices must either be real positive integers or logicals

indexMATLABpositive integer

I have a for loop that gives the values of x(n) — here n is an index.
d=0.5;
 
x(1)=1;
 
for n=2:10
x(n)= x(n-1)+d;
y(n)= log(abs(x(n)));
fprintf('y(%d)=%d', n, y(n))
end
I want the loop to also give the values of y(n) = log(abs(x(n))).
However, MATLAB doesn't seem to like this definition and I am presented with the error message: ??? Subscript indices must either be real positive integers or logicals.
What should I do to fix it?
Thanks.

Best Answer

matlab is ones based, not zeros... x(0) is an error
[edit]
works fine for me (added \n in fprintf statement)
d=0.5;
x(1)=1;
for n=2:10
x(n)= x(n-1)+d;
y(n)= log(abs(x(n)));
fprintf('y(%d)=%d\n', n, y(n))
end
y(2)=4.054651e-001
y(3)=6.931472e-001
y(4)=9.162907e-001
y(5)=1.098612e+000
y(6)=1.252763e+000
y(7)=1.386294e+000
y(8)=1.504077e+000
y(9)=1.609438e+000
y(10)=1.704748e+000
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