Data Manipulation encompasses a set of operations to alter the structure or values of a dataset often to make it more appropriate for the purpose at hand, for instance; data analysis.
More formally, we can define data manipulation as: Given a purpose and data that is in a certain form A, data manipulation is what we do to convert data from its original form A to a different form B that is more suited to the purpose.
We organize our coverage of data manipulation into Expressions and data type specific Operations. We think of the expressions as the grammar and of the data type specific operations as the vocabulary we use with that grammar to construct useful sentences.
The Expressions sections are as follows:
Inspecting the structure and contents of a data frame.