I have data on Magnetic Induction B and Magnetostriction λ. Both depend on magnetic field H, and stress (σ) [B(H,σ), λ(H,σ)]. For solving magnetostriction problem using vector potential approach one needs to reformat data into B(H,σ) to H(B,σ) and λ(H,σ) to λ(B,σ). Can you please help me out how do I reformat data? Which function is useful in MATLAB?