Z = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1147865/Experimental_data_botheq.xlsx') ;
data = table2array(Z) ;
plot(data(:,1), data(:,2), 'ko', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,3), data(:,4), 'ks', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,5), data(:,6), 'k^', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,7), data(:,8), 'kv', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,9), data(:,10), 'ko', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,11), data(:,12), 'ks', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,13), data(:,14), 'k^', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,15), data(:,16), 'kv', 'linewidth', 2,'MarkerFaceColor','k');
hold off