cols {RNAdecay} | R Documentation |
Identifies dataframe column names that have all of the pattern arguments (up to 4).
cols(df, w, x = NA, y = NA, z = NA)
df |
a dataframe with column names to parse |
w, x, y, z |
character string or regular expression passed to grep pattern argument |
Be aware that column data labels that are part of another data label are not advisable (e.g. mut1, mut2, mut1.mut2; cols(df,'mut1') will return indices for both 'mut1' and 'mut1.mut2' labeled columns
returns a vector of integer indices of the column names of df
that match to all of w
, x
, y
, and z
cols(data.frame(xyz=1:5,zay=6:10,ybz=11:15,tuv=16:20),'y','z') ## returns 1 2 3