Optxagnf fitted spectral parameters variation with each other of Swift J1644+57 are presented. Panel (a) shows the variation in N_H with respect to the normalized luminosity. The variation in N_H with respect to Γ is shown in panel (b). Panel (c) demonstrates the weak correlation between Γ and scattering fraction f_pl. Variation in Γ and τ can be observed in panel (d). Panel (e) presents the variation in R_cor and spin parameter. Uncorrelated variation between spin and R_cor can be observed in panel (e).