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Associate Columns By Name

SpannerHead

I got something to work here

Solved: Automatically plot associated columns - JMP User Community

but I'm pretty sure it's unnecessarily cumbersome. I have column names ending with the letter H (High) that I need to associate with column names that otherwise match but end with the letter L (Low). I can create an associative array with the column names having the final character removed. Snookered as to what to do next?

names default to here(1);
dt = Current Data Table();

colList = dt << get column names( string );

for each({col,index}, colList,
	//colList[index] = substr(col,1,3)
	colList[index] = Left(col,Length(col)-1)
);

grps = associative array(colList)<<get keys;

For instance, VT123ABCH needs to plot against VT123ABCL and so forth.

Accepted answers

txnelson

Here is an example of how you might do what you want

Names Default To Here( 1 );
dt = 
// Open Data Table: semiconductor capability.jmp
// → Data Table( "semiconductor capability" )
Open( "$SAMPLE_DATA/semiconductor capability.jmp" );

colNames = dt << get column names( continuous, string );

For Each( {col}, colNames,
	If( Ends With( col, "1" ) & Contains( colNames, Substr( col, 1, Length( col ) - 1 ) || "2" ),
		Graph Builder(
			Size( 534, 456 ),
			Show Control Panel( 0 ),
			Variables( X( As Column( col ) ), Y( As Column( Substr( col, 1, Length( col ) - 1 ) || "2" ) ) ),
			Elements( Points( X, Y, Legend( 3 ) ), Smoother( X, Y, Legend( 4 ) ) )
		);
	
	)
);

All comments

jthi

Do the pairs always exist? Are there other columns in the table than these pairs? Are they in specific order?

Edit:

Can most likely be made much better depending on the real use case

names default to here(1);

dt = New Table("",
	New Column("VT123ABCH"),
	New Column("VT123ABCL")
);

collist = dt << get column names(string);

hcols = Filter Each({colname}, colList,
	Ends With(colname, "H");
);

aa = Associative Array();

For Each({hcolname}, hcols,
	lcolname = Left(hcolname, Length(hcolname) - 1) || "L";
	If(dt << Has Column(lcolname),
		aa[hcolname] = lcolname
	);
);

Show(aa);

txnelson

Here is an example of how you might do what you want

Names Default To Here( 1 );
dt = 
// Open Data Table: semiconductor capability.jmp
// → Data Table( "semiconductor capability" )
Open( "$SAMPLE_DATA/semiconductor capability.jmp" );

colNames = dt << get column names( continuous, string );

For Each( {col}, colNames,
	If( Ends With( col, "1" ) & Contains( colNames, Substr( col, 1, Length( col ) - 1 ) || "2" ),
		Graph Builder(
			Size( 534, 456 ),
			Show Control Panel( 0 ),
			Variables( X( As Column( col ) ), Y( As Column( Substr( col, 1, Length( col ) - 1 ) || "2" ) ) ),
			Elements( Points( X, Y, Legend( 3 ) ), Smoother( X, Y, Legend( 4 ) ) )
		);
	
	)
);

SpannerHead

Jarmo

Looks much tidier that what I had, however, I'm getting this error.

"Object 'Data Table' does not recognize the message 'Has Column'"

jthi

That was added in JMP18

You can change it to Contains() and it should be fine most of the time

Contains(collist, lcolname)

SpannerHead

Jarmo

This is close but I notice that hcolname is empty, whereas lcolname has a value. Do I need to establish hcolname as an object or list?

SpannerHead

Jim

Great script and a lot simpler. I tweaked it a bit to have all the plots in a "Compilation" window .

Names Default To Here( 1 );
dt = Current Data Table();
colNames = dt << get column names( continuous, string );
New Window( "Compilation",
	For Each( {col}, colNames,
		If(
			Starts With( col, "VT" ) & Contains(
				colNames,
				Substr( col, 1, Length( col ) - 1 ) || "H"
			),
			Graph Builder(
				Size( 534, 456 ),
				Show Control Panel( 0 ),
				Variables(
					X( As Column( col ) ),
					Y( As Column( Substr( col, 1, Length( col ) - 1 ) || "L" ) )
				),
				Wrap( :LOT ),
				Elements(
					Points( X, Y, Legend( 1 ) ),
					Line Of Fit( X, Y, Legend( 3 ) )
				)
			)
		)
	)
);