Small utility function to obtain the number of the rows
in a data frame that have a "large" number of
unknown values.
"Large" can be defined either as a proportion of the
number of columns or as the number in itself.
Usage
manyNAs(data, nORp = 0.2)
Arguments
data
A data frame with the data set.
nORp
A number controlling when a row is considered to have too many NA values
(defaults to 0.2, i.e. 20% of the columns). If no rows satisfy the
constraint indicated by the user, a warning is generated.
Value
A vector with the IDs of the rows with too many NA values. If there are
no rows with many NA values and error is generated.
References
Torgo, L. (2010) Data Mining using R: learning with case studies,
CRC Press (ISBN: 9781439810187).