In a subsequent one, we showed how to avoid 'looping' by means of functions, that act on compound data in repetitive ways (the apply family of functions). Here, we introduce the notion of function from the R programmer point of view and illustrate the range of action that functions have within the R code ('scope').
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Basic Principles in. Social Work. RATIONALE. T. his unit discusses the basic principles of social work, and the ethics of a social. worker. It gives a clear view of how a social worker is expected to carry out his duties. It also specifies the demands made by social work, and provides important reminders. for the social worker.