indexing in the nested loop

sum_y_2_s=0;

sum_x_2_s=0;

for s=0:1:T-1

sum_y_2_s(s)=sum_y_2_s;

sum_x_2_s(s)=sum_x_2_s;

for z=s:1:T-1

sum_y_2_s(s)=sum_y_2_s(s)+y.^(z-s);

sum_x_2_s(s)=sum_x_2_s(s)+x.^(z-s);

ratio_1=(sum_y_2_s(s)./(sum_x_2_s(s)+K^(1/gamma)*x.^(T-s)));

end

if ratio_1<1

s_asterisk=s(end);

return

end

end

How should I index loop correctly. It shows

Array indices must be positive integers or logical values.

Error in opt_ret_positive_wealth (line 18)

sum_y_2_s(s)=sum_y_2_s

I am trying to find this ratio.

Thank you very much

Answer 1

[Torsten]

sx = 0;
sy = 0;
for s = T-1:-1:0
    sx = sx + x^(T-1-s);
    sy = sy + y^(T-1-s);
    ratio(s+1) = sy/(sx+K^(1/gamma)*x^(T-s));
end

[Raushan]

Thank you for your answer, I appreciate your help

[Torsten]

The answer has changed. If x or y equal 1, you get a division by zero from the old code. The code above should cover all possible cases for x,y > 0. You should compare the results from both codes.

[Raushan]

I got you, thank you