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Top 10 Values in Many Columns

I have a data table with a few thousand columns. I am looking to find the top "X" number of values in those columns, by another variable. For instance, I want to know the columns with the 10 highest values, when another column has a value of "Large Cap Stocks". 

3 REPLIES 3
jthi
Super User

Re: Top 10 Values in Many Columns

Without having any idea of your data it might be easiest to first stack your data and then pick the top 10 values.

-Jarmo

Re: Top 10 Values in Many Columns

I attached an example of a small set of my data. 

Re: Top 10 Values in Many Columns

Here's a way to do it with just one column. You could put this in a loop for each of your columns. This post has more background.

/*JMP STATISTICAL DISCOVERY LLC (“JMP”) PERMITS THE USE OF THIS COMPUTER SOFTWARE CODE (“CODE”) ON AN AS-IS BASIS AND AUTHORIZES YOU TO USE THE CODE SUBJECT TO THE TERMS LISTED HEREIN.  BY USING THE CODE, YOU AGREE TO THESE TERMS.  YOUR USE OF THE CODE IS AT YOUR OWN RISK.  JMP MAKES NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NONINFRIGEMENT, AND TITLE, WITH RESPECT TO THE CODE.
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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 );