[R] Simple question regarding name of column headers

[Addi Wei]

names(miceTrainSample)
[1] "b_double"  "KierA2"    "KierFlex"  "Q_VSA_POS" "pID50" 

In the above code, how do I delete "pID50" column to store the resulting
object without indicating column "5".  The code below does the trick, but I
wish to delete the column by specifying "-pID50" instead of "5". 

names(miceTrainSample)[-5]
[1] "b_double"  "KierA2"    "KierFlex"  "Q_VSA_POS"

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