How does the function quadprog() work?

Hi all, I have tried many things but the definitions for the input of the function quadprog() is different at different sources. Can somebody help me how I should use this function?

I defined the nr of assets. input_matrix equals the covariance matrix. And the mu_matrix the expected return. Both matrices with daily data. The inverse of the covariance matrix. The expected return of each asset daily which is also a matrix. nr_assets=k;

T= size(input_matrix,1);

weight_matrix=zeros(T,nr_assets);

i_vector = ones(k,1);

for i = 1:T

data_i = input_matrix(i,:);

cov_matrix_i = Vech2Sym(k,data_i);

mu_vector_i = mu_matrix (i,:)';

inverse_cov_matrix_i = inv(cov_matrix_i);

With these data I created 3different matrices:

A= i_vector' * inverse_cov_matrix_i*i_vector;

B= i_vector' * inverse_cov_matrix_i*mu_vector_i;

C=mu_vector_i'*inverse_cov_matrix_i*mu_vector_i;

And weight_1 = (C-q*B)/(A*C-B^2)

weight_2 = (q*A-B) / (A*C-B^2);

weight_matrix(i,:) = quadprog (inverse of covariance matrix, ???,???, ???,1,0,1). lb =0 because no short selling aloud.

(I also defined a function which puts vech of A into A. )

Is anyone able to help me? All help is appreciated.

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Student