Created
June 1, 2016 16:02
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| using DataFrames | |
| df = DataFrame(v1 = rand(Int16, 500), | |
| v2 = rand(Int16, 500), | |
| v3 = rand(Int16, 500), | |
| v4 = rand(Int16, 500)) | |
| unique0 = size(unique(df[:, [:v1, :v2, :v3]]), 1) | |
| unique1 = size(unique(df[:, [:v1, :v2, :v3, :v4]]), 1) | |
| gb0 = groupby(df, [:v1, :v2, :v3]) | |
| gb1 = groupby(df, [:v1, :v2, :v3, :v4]) | |
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