Class 21 (Conditional Logic, Loops, Vectors, Factors, Matrix, Data Frame and Lists,Subset Variables/Columns, Subset Observations/Rows, Make New Variables, Grouping Data, Sorting Data) - Research Help BangladeshSkip to contentClass 21 (Conditional Logic, Loops, Vectors, Factors, Matrix, Data Frame and Lists,Subset Variables/Columns, Subset Observations/Rows, Make New Variables, Grouping Data, Sorting Data) - Research Help BangladeshSkip to content