Is there a global flag that can be set to provide code alongside ROxygen documentation?

Is there a global flag that can be set to provide code alongside ROxygen
documentation?

References

Reference NO 1

http://stackoverflow.com/questions/14041601/documenting-equations-with-deqn-and-roxygen

Reference NO 2

http://stackoverflow.com/questions/16282615/include-matrix-in-equation-in-r-function-documentation

Reference NO 3

http://stackoverflow.com/questions/tagged/roxygen

Reference NO 4

http://stackoverflow.com/questions/7086805/how-can-i-document-datasets-without-adding-them-to-the-collate-field

Reference NO 5

http://stackoverflow.com/questions/7198858/documenting-r-oo-classes-methods-with-roxygen

Reference NO 6

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Reference NO 7

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Reference NO 8

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