Column switcher and Graph Builder

[#1]

Hi,

I have a number of columns which I have grouped together.

In the graph builder I have the X axis constant, but the Y axis should have the column switcher function where we can chose which parameter we want to switch between from the said group of columns.

First I tell JSL what columns should be in the group and which column should be my first column

colList = dttable << get column names( continuous );
	col1 = colList[1];

This is the code and the error I am getting,

Graph Builder(
	Size( 570, 621 ),
	Show Control Panel( 0 ),
	Show Legend( 0 ),
	Variables( X( :batch_no ), Y( :col1 ) /*###*/ ),
	Elements( Points( X, Y, Legend( 8 ) ) ),
	Column Switcher( :col1, {:colList} )
)

Can you tell me what I should write for the Y variable so I can get the first column to start with and then add the column switcher.

Thanks in advance

[#2]

great conversation : ) 
magnifier glass on the nuts and bolts of JSL ...

I just wondered about the difference between Variable() and Column Switcher() in 

Variables( ... Y( as column(col1) ) ),
Column Switcher( col1, colList )

This one works as well:

Names Default to Here(1);
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
cols = dt << get column names( continuous );

col1= cols[1];
gb = dt << Graph Builder(
	Size( 437, 413 ),
	Graph Spacing( 4 ),
	Variables( X(col1 ), ),
	Elements( bar( X ), ),
	Column Switcher( col1, cols )
);

as well as this one:

Names Default to Here(1);
dt = Open( "$SAMPLE_DATA/Big Class Families.jmp" );
cols = dt << get column names( continuous, "String" );

col1= cols[1];
gb = dt << Graph Builder(
	Size( 437, 413 ),
	Graph Spacing( 4 ),
	Variables( X(Column(col1) ), ),
	Elements( bar( X ), ),
	Column Switcher( col1, cols )
);

what doesn't work:

Names Default to Here(1);
dt = Open( "$SAMPLE_DATA/Big Class Families.jmp" );
cols = dt << get column names( continuous, "String" );

col1= cols[1];
gb = dt << Graph Builder(
	Size( 437, 413 ),
	Graph Spacing( 4 ),
	Variables( X(col1 ), ),
	Elements( bar( X ), ),
	Column Switcher( col1, cols )
);

so, Column Switcher() is fine with a String,

Variables() needs a name - or  a column (created via As Column() or column())

[#3]

@hogi is the meaning of your results that it is not an environment or name space issue, but something different?

[#4]

No, the issue with the table scripts is a namespace issue, as @txnelson explained.

String vs. name vs. Column is just something else one can learn about.