The prior knowledge plays an important role in increasing the performance of the support vector machines (SVMs). Traditional SVMs do not consider any prior knowl- edge of the training set. In this paper, the neighbors’ distrib- ution knowledge is incorporated into SVMs. The neighbors’ distribution can be measured by the sum of the cosine value of the angle, which is between the difference between the sample and its corresponding neighbor, and the differ-
ence between the sample and the mean of corresponding neighbors. The neighbors’ distribution knowledge reflects the sample’s importance in the training processing. It can be explained as the relative margin or instance weight. In this paper, the neighbors’ distribution knowledge is regarded
as the relative margin and incorporated into the frame- work of density-induced margin support vector machines whose relative margin is measured by relative density degree. The results of the experiments, performed on both artifi- cial synthetic datasets and real-world benchmark datasets, demonstrate that SVMs performs better after incorporating neighbors’ distribution. Furthermore, experimental results also show that neighbors’ distribution are more suitable than relative density degree to represent the relative margin.

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