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Level II

## Create New Column with variables

Hi all,

I am trying to create a new column with formula, which represented by 2 variables as below:

dt << New Column("myNewColumn", Numeric, Continuous, Formula(:Ceiling( XXColumn / Size) * Size));

where:

XXColumn is one of column name in dt, selected in column dialog

Size = numeric value from column dialog

My attempt resulted a new column with formula with no value as formula create as below:

Ceiling(Column(XXColumn ) / Size) * Size

without actually assign it.

Any idea how I can accomplish this?

1 ACCEPTED SOLUTION

Accepted Solutions
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Level II

## Re: Create New Column with variables

finally the magic happened !!!

here is the code i used..

col = dts << New Column("Binning", Numeric, Continuous);

Eval( Parse( Eval Insert( "col << Set Formula(:Ceiling( ^n_Bin^ / ^BinSize^) * ^BinSize^)<< eval formula" )) );

Thank You MS for the guidance; what is the diff on f_bin and n_bin i used?

12 REPLIES 12
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Super User

## Re: Create New Column with variables

Variables in formulas are not evaluated when created and should therefore be expressed literally. One way to circumvent that is to manipulate and parse strings.

Example:

dt = Open( "\$SAMPLE_DATA/Big Class.jmp" );

cols = Column Dialog( Col1 = ColList( "X", Max Col( 1 ), Datatype( numeric ) ), Col2 = ColList( "Y", Max Col( 1 ), , Datatype( numeric ) ) );

XXColumn = cols["Col1"][1] << get name;

Size = cols["Col2"][1] << get name;

Eval( Parse( Eval Insert( "dt << New Column(\!"myNewColumn\!", Numeric, Continuous, Formula(Ceiling( ^XXColumn^ / ^Size^) * ^Size^))" ) ) );

Highlighted
Level II

## Re: Create New Column with variables

Thank you MS.

The new column created with correct formula. But, the rows are empty. I need to go to the formula section on UI and click apply then only values prompts.

is it expected?

Highlighted
Super User

## Re: Create New Column with variables

No, it was not expected. For me (JMP 10 for Mac) it works without clicking "Apply". There was an inadvertant colon before "Ceiling..." that remained from your original code (I've now edited my code above). Maybe it helps to delete that.

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Level II

## Re: Create New Column with variables

mine is JMP8.0.0 Windows

with or without it still the same. T_T

Highlighted
Super User

## Re: Create New Column with variables

Try <<eval formula.

Eval( Parse( Eval Insert( "dt << New Column(\!"myNewColumn\!", Numeric, Continuous, Formula(Ceiling( ^XXColumn^ / ^Size^) * ^Size^), <<eval formula)" ) ) );

Highlighted
Level II

## Re: Create New Column with variables

Its not working. The result still same.

In JSL, apply button == ? do you know?

Super User

## Re: Create New Column with variables

No. Eval Formula is supposed to be eqivalent as far s I know.

Try to separate the new column and set formula into separate expressions:

dt = Open( "\$SAMPLE_DATA/Big Class.jmp" );

cols = Column Dialog(

Col1 = ColList( "X", Max Col( 1 ), Datatype( numeric ) ),

Col2 = ColList( "Y", Max Col( 1 ), Datatype( numeric ) )

);

XXColumn = cols["Col1"][1] << get name;

Size = cols["Col2"][1] << get name;

col = dt << New Column( "myNewColumn", Numeric, Continuous );

Eval( Parse( Eval Insert( "col << Set Formula(Ceiling( ^XXColumn^ / ^Size^) * ^Size^)" ) ) );

col << eval formula;

Highlighted
Level II

## Re: Create New Column with variables

It did not work. Maybe I should explain what I am doing and share paste my code.

Step 1: Collect input from Column dialog

Step 2: Do Summary table with Min,Mean, Max for selected column + default column

Step 3: Create new column for Ceiling

Step 4: Do plotting using Graph builder

Code:

dt0 = current data table();

FN = dt0 << Get Name;

r = Column Dialog(

Bin = ColList( "X, Binning By", Max Col( 1 ) ),

Overlay = ColList( "Group by / Overlay by", Max Col( 1 ) ),

Split = ColList( "Y, Response",Max Col( 5 ) ),

Compare = ColList( "X-Axis Top", Max Col( 1 ) ),

HList( "Bin Size: ", BinSize = EditNumber( .1 ) ),

);

Bin     = r["Bin"];

Overlay = r["Overlay"];

Split   = r["Split"];

Compare = r["Compare"];

BinSize = r["BinSize"];

dts = dt0 << Summary(

Group(:Fixed, column(dt0,Overlay), column(dt0,Compare) ),

Mean( :Yield ),

Min ( column(dt0,Bin) ),

Mean( column(dt0,Bin) ),

Max ( column(dt0,Bin) ),

Min ( column(dt0,Split[1]) ),

Mean( column(dt0,Split[1]) ),

Max ( column(dt0,Split[1]) ),

Min ( column(dt0,Split[2]) ),

Mean( column(dt0,Split[2]) ),

Max ( column(dt0,Split[2]) ),

Min ( column(dt0,Split[3]) ),

Mean( column(dt0,Split[3]) ),

Max ( column(dt0,Split[3]) ),

Min ( column(dt0,Split[4]) ),

Mean( column(dt0,Split[4]) ),

Max ( column(dt0,Split[4]) ),

Min ( column(dt0,Split[5]) ),

Mean( column(dt0,Split[5]) ),

Max ( column(dt0,Split[5]) ),

statistics column name format( "column stat" ),

);

dts << Set Name (FN || " Summary");

n_Bin = Bin[1]||" Mean";

f_Bin = Column(dts, n_Bin);

col = dts << New Column("Binning", Numeric, Continuous);

Eval( Parse( Eval Insert( "col << Set Formula(Ceiling( ^f_Bin^ / ^BinSize^) * ^BinSize^)" )) );

Highlighted
Super User

## Re: Create New Column with variables

Try use n_Bin directly instead of f_Bin:

Eval( Parse( Eval Insert( "col << Set Formula(Ceiling( ^n_Bin^ / ^BinSize^) * ^BinSize^)" )) );

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