<dependency> <groupId>com.github.fommil.netlib</groupId> <artifactId>all</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>org.armadillojava</groupId> <artifactId>armadillo-java</artifactId> <version>1.10.2</version> </dependency> Mat matrix = new Mat(3, 3); double element = matrix.at(0, 0); Mat matrix1 = new Mat(3, 3); Mat matrix2 = new Mat(3, 3); Mat result = matrix1.plus(matrix2); matrix.save("matrix.txt", arma_ascii);