libr (version 1.3.9)

delete: Removes an observation from a datastep

Description

The delete function will remove an observation from the output of a datastep. The function takes no parameters. To use the function, simply call it on the rows you want to delete. Typically it is called within a conditional.

Usage

delete()

Value

Observation is marked with a delete flag. No return value.

See Also

Other datastep: [.dsarray(), datastep(), dsarray(), dsattr(), length.dsarray(), output()

Examples

#' # Remove all cars that are not 4 cylinder
df <- datastep(mtcars, 
               keep = c("mpg", "cyl", "disp"), {
                 
  if (cyl != 4)
    delete()
                 
})

df
#     mpg cyl  disp
# 1  22.8   4 108.0
# 2  24.4   4 146.7
# 3  22.8   4 140.8
# 4  32.4   4  78.7
# 5  30.4   4  75.7
# 6  33.9   4  71.1
# 7  21.5   4 120.1
# 8  27.3   4  79.0
# 9  26.0   4 120.3
# 10 30.4   4  95.1
# 11 21.4   4 121.0