Spam Detection

N Gram Model on word and character level similar to Language Identification by applying Bayes Rule

$\underset{c\in \{\text{ spam, ham }\}}{\mathrm{argmax}}(P(\mathbf{c}\mid \mathbf{m}))\underset{\mathbf{c}\in \{\text{ spam, ham }\}}{\mathrm{argmax}}(P(\mathbf{m}\mid \mathbf{c})P(\mathbf{c}))$