Algorithm 4: Calculating the distances between the two-digit classes

$\mathrm{Assume} \mathrm{that} {\mathit{F}}^{\mathit{m}} = \left(f_1 f_2 \dots f_S\right)$$\mathrm{is} \mathrm{a} \mathrm{feature} \mathrm{matrix} \mathrm{for} m^{th}$$\mathrm{class} \mathrm{and} m = 1,2, \dots , O$$\mathrm{and} S$ is the number of the examples in a given class. S1: Calculate the centroids for each class in a given dataset. S2: Calculate the distance between the centroids of two classes. $L_{m\left(m-1\right)}=\left|\left|F_c^m-F_c^{m-1}\right|\right|$