load(strcat(filename,'.mat')) clc symsV E x = sym('x',[3,1]); kB=1.38e-23; delta1=200e-6; T=.270; xdata=V3(1:end-1); ydata=Gzoomin; Cn=1; delta2=200e-6; gamma2=10e-6; As a second step, I want to evaluate this derivative analytically, and then turn it into...