cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Submit your abstract to the call for content for Discovery Summit Americas by April 23. Selected abstracts will be presented at Discovery Summit, Oct. 21- 24.
Discovery is online this week, April 16 and 18. Join us for these exciting interactive sessions.
Choose Language Hide Translation Bar
lwx228
Level VIII

How do use JSL to quickly compare two sets of range columns in order to get the minimum of each column?

The title is a bit hard to understand.

 

Take this big class as an example:
1. First, summarize the average values of "height" and "weight" by age.
2. Then summarize the median of "height" and "weight" by age.
3. Then compare the mean and median of "height" and take their minimum.
Finally, compare the mean and median of "body weight" and take their minimum.

2020-06-04_09-13.png

 

I'll use the following code and finally loop through to get the minimum.
Is there any good code that minimizes this comparison?

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
d1 = dt << Summary(
	Group( :age ),
	Mean( :height ),
	Mean( :weight ),
	Median( :height ),
	Median( :weight ),
	Freq( "None" ),
	Weight( "None" ),
	Link to original data table( 0 ),
	statistics column name format( "column" )
);
c = N Col( d1 ) / 2 - 1;
For( i = 1, i <= c, i++,
	ca = Column( i + 2 ) << Get Name || "0";
	d1 << New Column( ca, formula( Min( As Column( 2 + i ), As Column( 2 + c + i ) ) ) );
	d1 << run formulas;
	Column( ca ) << deleteFormula;
	
);

Thanks!

1 ACCEPTED SOLUTION

Accepted Solutions
txnelson
Super User

Re: How do use JSL to quickly compare two sets of range columns in order to get the minimum of each column?

Here is a possible quicker solution for you

Names Default To Here( 1 );
dtOrig = open("$SAMPLE_DATA/semiconductor capability.jmp");
colNames = dtOrig << get column names(continuous);
dt = dtOrig << Summary(
	Group( :SITE ),
	mean(colnames),median(colnames),
	link to original data table(0)
);

half = N Col( dt ) / 2 - 1;
For( i = 3, i <= half, i++,
	mat = dt[0, i];
	mat = mat || dt[0, i + half];
	v = Transpose( V Min( Transpose( mat ) ) );

	dt << New Column( "Min" || Substr( Column( dt, i ) << get name, Contains( Column( dt, i ) << get name, "(" ) ),
		set values( v )
	);
);
Jim

View solution in original post

4 REPLIES 4
lwx228
Level VIII

Re: How do use JSL to quickly compare two sets of range columns in order to get the minimum of each column?

This looping method is slow when the number of columns and rows that need to be summarized for comparison is large.
Is the matrix method faster?Or there are other good ways.

 

Thanks Experts!

lwx228
Level VIII

Re: How do use JSL to quickly compare two sets of range columns in order to get the minimum of each column?

And it's inefficient:
Min( As Column( 2 + i ), As Column( 2 + c + i ) ) )
txnelson
Super User

Re: How do use JSL to quickly compare two sets of range columns in order to get the minimum of each column?

Here is a possible quicker solution for you

Names Default To Here( 1 );
dtOrig = open("$SAMPLE_DATA/semiconductor capability.jmp");
colNames = dtOrig << get column names(continuous);
dt = dtOrig << Summary(
	Group( :SITE ),
	mean(colnames),median(colnames),
	link to original data table(0)
);

half = N Col( dt ) / 2 - 1;
For( i = 3, i <= half, i++,
	mat = dt[0, i];
	mat = mat || dt[0, i + half];
	v = Transpose( V Min( Transpose( mat ) ) );

	dt << New Column( "Min" || Substr( Column( dt, i ) << get name, Contains( Column( dt, i ) << get name, "(" ) ),
		set values( v )
	);
);
Jim
lwx228
Level VIII

Re: How do use JSL to quickly compare two sets of range columns in order to get the minimum of each column?

Thank Jim!