Fig. 2From: DeepGene: an advanced cancer type classifier based on deep learning and somatic point mutationsFlowchart of the Indexed Sparsity Reduction (ISR) step. After indexing of the non-zero elements, if n NZ  ≥ n ISR , select the top n ISR non-zero elements that have the highest occurrence frequency; if n NZ  < n ISR , we conduct zero-padding to the tail of the output data so that it has the length of n ISR Back to article page