Trying to find Young's Modulus in a specific range. I was to plot the the data for that range, but when I try to get the slope value, it gives me NaN. I worked on the code for days and tried various methods and loopholes, but I can't seem to get it.

`data = readtable('TITLE.txt','ReadVariableNames',true);Load = data.Load(1:end); Displacement = data.Displacement(1:end);Strain = data.Strain(1:end);Strain(Strain < 0.001) = NaN; plot(Strain)Strain(Strain > 0.003) = NaN; plot(Strain) p = plot(Strain, Load, '.', 'color','r')title('Youngs Modulus','FontSize', 20);xlabel('Strain (in/in)', 'FontSize', 15);ylabel('Load(lbf)', 'FontSize', 15);polyfit(Strain, Load, 1)polyval(Strain, Load)`

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