first_of_isoweek {dint}  R Documentation 
first_of_yw()
is equivalent with first_of_isoweek()
and only included
for symmetry with first_of_yq()
and first_of_ym()
.
first_of_isoweek(x)
## Default S3 method:
first_of_isoweek(x)
last_of_isoweek(x)
## Default S3 method:
last_of_isoweek(x)
first_of_yw(x, w = NULL)
last_of_yw(x, w = NULL)
x 
Anything that can be coerced to a date with 
w 
Two integer (vectors).

a Date
first_of_isoweek("20160604")
last_of_isoweek("20160604")
first_of_yw(2016)
first_of_yw(2016)