Show that a cost matrix is scale-invariant. For example, if the cost matrix is rescaled from C(i, j) ?? ?C(i, j), where ? is the scaling factor, the decision threshold (Equation 5.82) will remain unchanged.

What will be an ideal response?

The cost matrix is:









A node t is classified as positive if:









The transformed cost matrix is:









Therefore, the decision rule is:









which is the same as the original decision rule.

Computer Science & Information Technology

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