The Jacobian of the nonlinear system (unknowns are p,s) has the form of J=[ Jpp,Jps;Jsp,Jss]. However, I want to compute each block of Jacobian at different points. Jpp at x=(p1,s1); Jps at x(p2,s2); Is it possible to approximate each block (evaluated at different points) using FD? I have the residual expression for the nonlinear system: f[j][i].p=.... f[j][i].S=....
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