| count_if | R Documentation | 
This function allows counting of single elements or all elements in a vector in a given data set.
count_if(
  data, 
  value, 
  ifnot = FALSE
)
data | 
 Data input, e.g., as vector  | 
value | 
 Values of the elements to be counted, either one value or vector of values  | 
ifnot | 
 Specifies whether the value to be tested is true or not. Default = FALSE. ifnot = TRUE would count how many times the data set is not the value of interest.  | 
count_if(data, value = c(1:8))
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