col_order <- c(“Species”, “Petal.Width”, “Sepal.Length”,<br /> “Sepal.Width”, “Petal.Length”)<br /> my_data2 <- my_data[, col_order]<br /> my_data2</p> <p># or<br /> my_data2 <- my_data[, c(5, 4, 1, 2, 3)]

col_order <- c(“Species”, “Petal.Width”, “Sepal.Length”,<br /> “Sepal.Width”, “Petal.Length”)<br /> my_data2 <- my_data[, col_order]

# Reorder by column name<br /> df <- df[c(“A”, “B”, “C”)]</p> <p># Reorder by column index<br /> df <- df[c(1, 3, 2)]