Vitamin B2, also called riboflavin, is essential for proper adrenal function and overall nerve health. Dairy products, such as cheese, are rich sources. Vitamin B2, also called riboflavin, is essential for proper adrenal function and overall nerve health.
n. 1. (Mathematics) maths. a. a set the members of which are all members of some given class: A is a subset of B is usually written AâB. b. proper subset one that is strictly contained within a larger class and excludes some of its members.
For example, !(X & !(Y | Z)) simplifies to !X | !!(Y|Z), and then to !X | Y | Z. subset() is a specialised shorthand function for subsetting data frames, and saves some typing because you donât need to repeat the name of the data frame.