clc;clear all; close all; data=xlsread('pragyan.xlsx'); Ai=0.04; R= 2.65e-8; Ci= 100; Ce= 6.5;x=4; dst=2710; w=311.15; pf=0.85; V=11; x=4; n=4; L=data(5:8); I=data(1:4); cost=0; loss=0; cvx_begin variable X(n); %expression cost(5); %expression loss(5); for i=1:n cost(i)= pi *X(i)^2*L(i)*R*dst*Ci*Ai/4; loss(i)=3*I(i)^2*R*L(i)*Ce*8760/(( pi*X(i)*X(i))); cost=cost+cost(i); loss=loss+loss(i); Z(i)= (R*L(i)*pf/(pi*x(i)*x(i)) + w*2e-7*log(0.558*0.526/x(i))); VD(i)= I(i)*Z(i); V(i)=(V-VD(i))/V; end T_cost=sum(cost)+sum(loss); minimize((T_cost)) subject to V(i)<=0.1; d(i)>=0 cvx_end
You need to use expression holders (declaration) for all of
cost, loss, Z, VD, V. http://cvxr.com/cvx/doc/basics.html#assignment-and-expression-holders
I don’t know what you are trying to do with
but I am not confident it is doing what you want, even though I don’t know what that is. You are summing over
loss later in the code after you assigned all their elements in the for loop. So I doubt you want any other summing.