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Row and column sums and of gpuMatrix objects
# S4 method for gpuMatrix colSums(x)# S4 method for gpuMatrix rowSums(x)# S4 method for gpuMatrix colMeans(x)# S4 method for gpuMatrix rowMeans(x)
# S4 method for gpuMatrix rowSums(x)
# S4 method for gpuMatrix colMeans(x)
# S4 method for gpuMatrix rowMeans(x)
A gpuMatrix object
A gpuVector object