Comparison between the growth rates obtained semi-analytically in the incompressible MHD approximation (left) and the growth rates obtained from simulations (right) and as functions of the mode number, n, in logarithmic scale, limited to n = 50. In both panels, the perpendicular magnetic field cases are shown with solid lines and sheared case are shown with dashed lines. Orange lines: P-WN-S; black lines: P-WN-NN-S; red lines: L1-WN-S; green lines: L1-WN-NN-S, and blue lines for L1-WN-NN-B-S.