R Programming: replace missing values in column of a data frame
42719
Warning message: In `...` : invalid factor level, NA generated
40942
Conditional merge/replacement in R
43575
R cleaning up a character and converting it into a numeric
116610
Filtering and Replacing outliers
4764
missing minus sign in R code using latex
154952
Fill the blank values of a variable with the previous non blank value SAS 9.3
146977
Subset of a data frame with the penultimate values of one of the columns
77815
Machine Learning with intended missing values
37373
Reshape three column data frame to matrix ("long" to "wide" format)
102482
Transpose a data frame
84325
Dynamically select data frame columns using $ and a character value
116221
Remove columns with same value from a dataframe
78236
How to perform imputation of values in very large number of data points?
31519
R: subsetting data frame by both certain column names (as a variable) and field values
119496
Standardizing variables with negative values in R
4678
Replace values which obey certain criteria
54588
Replacing all values in a table > $T$