I have absolutely no idea what you want to plot, and the data posted do not give anything similar to the plot image.
Other than that, if you want to load the Excel file and plot the data, womething like this will work.
T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/690238/Load-displacement.xlsx', 'VariableNamingRule','preserve')
plot(T1.('s (mm)'), T1.('F (N)'))
Experiment to get the result you want.