itarticle coalesce with wrapr 1 0.31 0.25 2 0.41 0.50 3 NA 0.50 more_precise_sensor cheaper_back_up_sensor measurement 1 0.31 0.25 0.31 2 0.41 0.50 0.41 3 NA 0.50 0.50 2021-01-14 0
