Exercise

Deselecting specific columns

You can also drop or deselect columns by prepending the character vector of column names with the - or ! operators. For e.g., dt[, -c("col1", "col2")] or dt[, !c("col1", "col2")] would both return all columns except col1 and col2.

Instructions

100 XP

Deselect the columns start_terminal and end_terminal from batrips.

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Instructions

Exercise