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Global linear calibration results for transverse forces: (a,b) Calculated Fx and Fy versus the actual values. (c,d) residual errors versus the actual forces, (e,f) probability distribution of residuals (bin size = 0.1 mN). The global linear fitting can predict the applied forces with an rms error of 0.25 mN and 0.52 mN for Fx and Fy, respectively.
