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This article mainly shows you the "sample analysis of Rcpp type List in R language", which is easy to understand and clear. I hope it can help you solve your doubts. Let me lead you to study and study the "sample analysis of Rcpp type List in R language".

When we want to return multiple types of objects in Rcpp through a return function, we need to organize all our objects into a Rcpp::List type and then return them.

However, compared to list in R (mat1 = mat1, mat2 = mat2), list creation in Rcpp is relatively complex and requires the use of the create () function, as shown in the following example:

Rcpp::List ListFun (MatrixXd X) {Eigen::MatrixXd mat1, mat2; return List::create (Named ("matrix1") = mat1, Named ("matrix2") = mat2);}

After return, what should we do when we want to call the List in our .cpp file (or read the list type in R directly)?

In fact, it is also very simple, which can be divided into two steps: the first step is to create the List, and the second step is to create the content in the List, with the object type corresponding to it, as shown below:

Void TestFun (MatrixXd X, MatrixXd Y) {Rcpp::List result_x, result_y; result_x= ListFun (X); result_y= ListFun (Y); MatrixXd mat1_x = result_x ["matrix1"]; MatrixXd mat1_y = result_y ["matrix1"]; MatrixXd mat2_x = result_x ["matrix2"]; MatrixXd mat2_y = result_y ["matrix2"] } the above is all the content of the article "sample Analysis of Rcpp Type List in R language". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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