I need to find the answer for the following error and code

sum1 = zeros(172,1);
sum2 = 0;

for i = 1:length(data2) % Iterate up to the length of H_BM or g_mean
    sum1(i) = P1(i)*(g_p(i)+((g_mean(i).*H_BM(i))*(10)^(-5)));
    sum2 = sum2 + P1(i);
    %fprintf('Iteration %d: sum1 = %.6f\n', i, sum1(i)); % Print iteration output of sum1
end
xx = sum1;
total = sum(xx)
ssum = sum1.*H_BM;


std_ssum = std(ssum,1);
std_ssum

there is a error when taking the total. "Array indices must be positive integers or logical values." please help me to solve this problem.

[Walter Roberson]

Chances are that you previously created a variable named sum or std

[Prabhath Manuranga]

Thanks for your guidance. as you mentioned i used same names previously.

[Voss]

clear sum std

[Prabhath Manuranga]

Thank you.