episem: Define Epidemiological Week.
In claudia-codeco/AlertTools: utility functions for the Alerta Dengue System

Description Usage Arguments Value Author(s) Examples

Find to which epidemiological week belongs a given day

1	episem(x, format = "%Y-%m-%d", separa = "", retorna = "YW")

`separa`	symbol between year and week
`retorna`	What should be return, if epidemiological year and week ('YW'), epi. year only ('Y') or epi. week only ('W'). Default: 'YW'.
`date`	date to be converted (class Date)

epidemiological week or year. If separa = ”, the output is numeric; otherwise is a character.

Oswaldo Cruz

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episem(x= as.Date("2018-12-31", format="%Y-%m-%d"))
episem(x= as.Date("2015-01-01", format="%Y-%m-%d"), separa='-')
episem(x= as.Date("2015-01-01", format="%Y-%m-%d"), retorna='Y')