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file = 'Copper_Wire_Data.xlsx'; M = xlsread(file); p = 1.68e-8; % resistivity of copper V = [4.5 6 9]; % volatages available core_d = M(:,3)' * 1e-3; % diameter of copper core wire_d = M(:,4)' * 1e-3 ; % diameter of whole wire turns = floor(14e-3 ./ wire_d); layers = floor(13.5e-3 ./ wire_d); windings = floor(turns .* layers); len = zeros(1,length(M(:,1))); for i = (1:length(M(:,1))) for j = (1:layers(i)) len(i) = len(i) + (pi*(25.5+(2*wire_d(i)*(j-1)))); end end len = len .* turns; area = pi * ((core_d./2).^2); res = p * (len./area); plot(M(:,1),res);