How to sort a data frame in R

Question

I am new to R, and want to sort a data frame called \"weights\". Here are the details:

>str(weights)
\'data.frame\':   57 obs. of  1 variable:
 $ attr_imp         


        

Answer 1

Since your data.frame only has one column, you need to set drop=FALSE to prevent the dimensions from being dropped:

weights[order(-weights$attr_importance),,drop=FALSE]
#         attr_importance
# our         0.125433292
# all         0.098185517
# address     0.090686474
# over        0.075182467
# make        0.049630556
# num3d       0.007122618