How to calcule the mean of values considering their tuples of another value:

General Usage
4

You can also use the DataFrames documentation to form a DataFrame that is grouped with these values:

x = [1,2,2,3,5,6,1,2,9,2,1,6,4,2]
y = [0,0,0.1,0.1,0.2,0.3,0.4,0.5,0.5,0.6,0.7,0.8,0.9,1]
df = DataFrame(scores1=x, normalized_len=y)
gb=groupby(df, :normalized_len)
println(combine(gb, :scores1 => mean))

Output:

11×2 DataFrame
 Row │ normalized_len  scores1_mean 
     │ Float64         Float64      
─────┼──────────────────────────────
   1 │            0.0           1.5
   2 │            0.1           2.5
   3 │            0.2           5.0
   4 │            0.3           6.0
   5 │            0.4           1.0
   6 │            0.5           5.5
   7 │            0.6           2.0
   8 │            0.7           1.0
   9 │            0.8           6.0
  10 │            0.9           4.0
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