数千の列を含むデータテーブルがあります。 別の変数を使用して、これらの列内の値の上位「X」個を見つけようとしています。 たとえば、別の列に「大型株」の値がある場合に、上位 10 位の値を持つ列を知りたいとします。
データについて何も考えていない場合は、まずデータを積み重ねてから、上位 10 個の値を選択するのが最も簡単かもしれません。
ここでは 1 つの列だけでそれを行う方法を示します。 これを各列のループに入れることができます。 この郵便受けより多くの背景があります。
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//init
n = N Rows();
lstCategories = Associative Array( :Stock Type << Get Values ) << Get Keys;
lstRows = {};
dt = Current Data Table();
dt << Clear Column Selection;
dt << Clear Select;
//loop through each category for first column; save top 10 for each category into lstRows
For Each( {i}, lstCategories,
dt << Select Where( :Stock Type != i );
dt << Hide and Exclude;
dt << Clear Select;
dt << select rows( Loc( Ranking( :"Value 1"n[1 :: n] ) >= n - 10 ) );
t = As List( dt << Get Selected Rows );
Show( i );
Show( t );
dt << Clear Row States;
Insert Into( lstRows, t );
);
//do something with the rows
dt << Select Rows( lstRows );
わあ、 Loc(ランキング...)はすごいですね！とても便利です！
私は質問を読んで、
@dkraeuter_sunne は次のように書いています:
最も高い10個の値を持つ列
- 行ごとに?
それはそうかもしれない
dt = Current Data Table();
nc = N Cols();
Row() = 4;
For Each Row(
If( :Stock Type == "Large Cap Stock",
mx = Max( dt[Row(), 2 :: nc] );
colnumbers = Loc( Ranking( mx - dt[Row(), 2 :: nc] ) <= 10 );
colnames = Transform Each( {col}, As List( colnumbers ), Column( col + 1 ) << get name );
Print( Row(), colnames );
)
);
「列 27」以降には欠損値が多数あります。これらも分析に含める必要がありますか?
