topic Create and populates new columns based categories in an existing column in Discussions

Create and populates new columns based categories in an existing column

Sburel — Mon, 18 May 2020 20:01:08 GMT

Hello,

I'm trying to build a quick query in which a categorical column (test_article) is used to create a series of column which contains only a subset of the information. If the script works as intended, the table would end up with 2 new columns (PBS vs ...).

test_article	measurement	PBS vs 709547	PBS vs 709139
PBS	1.23	PBS	PBS
PBS	1.456	PBS	PBS
709547	4.56	709547	EXCLUDE
709139	5.02	EXCLUDE	709139
709139	6.02	EXCLUDE	709139
709547	4.57	709547	EXCLUDE

I've tried the following script:

NamesDefaultToHere(1);
dt=current data table();

row = Associative Array( :test_article ) << Get Keys;
nc=N items (row);
For( i = 1, i <= nc, i++,
		new column("PBS vs "|| row[i],"Character", "Nominal", Formula(If( :test_article == "PBS", :test_article,
	If( :test_article == row[i],
		"test",
		"EXCLUDE"
	)
))));

Somehow, it does not populate any values in the new columns with the exception of 'PBS'.

Any suggestions?

Thanks a lot

Sebastien

Re: Create and populates new columns based categories in an existing column

txnelson — Mon, 18 May 2020 22:01:16 GMT

The primary issue you are having is that within the definition of a formula, one can not have items that need to be evaluated. JMP thinks everything within the formula definition is to be evaluated only when the formula is executed.

Therefore, the formula that is passed into the New Column definition, must be complete in it's syntax. The modification of your code below works with your sample data table.

Names Default To Here( 1 );
dt = Current Data Table();

row = Associative Array( :test_article ) << Get Keys;
nc = N Items( row );
For( i = 1, i <= nc, i++,
	Eval(
		Parse(
			"New Column( \!"PBS vs " || row[i] ||
			"\!",
		Character,
		Nominal,
		Formula(
		if (Row() == 1, theTest = \!""
			 || row[i] ||
			"\!"); 
			If( :test_article == \!"PBS\!",
				zip=:test_article,
				If( :test_article == theTest,
					zip=\!"test\!",
					zip=\!"EXCLUDE\!"
				)
			);
			zip
		)
	)
);"
		)
	)
);

Re: Create and populates new columns based categories in an existing column

Jeff_Perkinson — Mon, 18 May 2020 22:08:31 GMT

You need to get the value of row[i] into the formula. JMP doesn't evaluate expressions inside the Formula() part of the New Column() message.

You can use Substitute() to get the actual value of row[i] into the formula.

Names Default To Here( 1 );
dt = Current Data Table();

row = Associative Array( :test_article ) << Get Keys;
nc = N Items( row );
For( i = 1, i <= nc, i++,
	Eval(
		Substitute(
				Expr(
					New Column( "PBS vs " || row[i],
						"Character",
						"Nominal",
						Formula( If( :test_article == "PBS" | :test_article == ri, :test_article, "EXCLUDE" ) )
					)
				),
			Expr( ri ), Eval( row[i] )
		)
	)
);

Re: Create and populates new columns based categories in an existing column

Sburel — Mon, 18 May 2020 22:17:31 GMT

Works like a charm!

Thanks

Re: Create and populates new columns based categories in an existing column

Sburel — Mon, 18 May 2020 22:17:51 GMT

Also works like a charm.

Thanks a lot