[Solved] Remove selected columns in R dataframe [duplicate]

by

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###Use subset command:###
dataframename <- subset(dataframename, select = -c(col1,col4) )

###One more approach is you can use list(NULL) to the dataframe:###
dataframename[,c("col1","col4")] <- list(NULL)

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solved Remove selected columns in R dataframe [duplicate]