exercițiu

Sorting your data frame

Alright, now that you understand the order() function, let us do something useful with it. You would like to rearrange your data frame such that it starts with the smallest planet and ends with the largest one. A sort on the diameter column.

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100 XP

Call order() on planets_df$diameter (the diameter column of planets_df). Store the result as positions.
Now reshuffle planets_df with the positions vector as row indexes inside square brackets. Keep all columns. Simply print out the result.

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