Figure 6. Linear Discriminant Analysis.

(a) x-axis is T-cell density in the region of episode initiation (T0), (b) x-axis (x_i) is the scalar projection value of ith initial condition <T1_i; T2_i; T3_i; T4_i; T5_i; T6_i> obtained by projecting onto vector w1 that maximizes Fisher criterion. In both (a) and (b), Class A (0–2 days) of initial T-cell densities showed maximum separation from the other three classes, indicating strong correlation between initial T-cell densities and episode severity only for episodes that last for 0–2 days.