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creating new columns with a for loop with column names and formula

I am trying to create a split table from an existing table and add new columns into the split tables each with a formula based on the columns that were split. However the code creates the new columns but gives me "Formula evaluation errors"

 

dt2 = Current Data Table();

// Create the split data table
dt2 = dt << Split(
 Split By( :S ),
 Split(
    :Name( "Median(data)" )
   ),
 Group( :L, :m, :C, :P, :z, :x ),
 Remaining Columns( Drop All ),
 Sort by Column Property
);
colname = {"B","C"};
colby = {"A","B"};

// Add new columns to the split data table
For( i = 1, i <= N Items( colname ), i++,
dt2 << New Column( colname[i]||"/"||colby[i],
 Numeric,
 "Continuous",
 Format( "Best", 12 ),
 Formula( column(colname[i]) / column(colby[i]) )
););

Automation and ScriptingRe: creating new columns with a for loop with column names and formula

JMP formula definition will not evaluate when being defined, only when run.  Therefore, the formula needs to be presented to JMP in a fully defined form.

Column( colname[i] ) /  Column( colby[i] )

needs to presented to JMP as

Column( "B" ) / Column( "A" )

Using the Substitute function allows for the expanding of the code as required

 

// Add new columns to the split data table
For( i = 1, i <= N Items( colname ), i++,
 Eval(
  Substitute(
    Expr(
     dt2 << New Column( colname[i] || "/" || colby[i],
      Numeric,
      "Continuous",
      Format( "Best", 12 ),
      Formula( Column( __colname__ ) / Column( __colby__ ) )
     )
    ),
   Expr( __colname__ ), colname[i],
   Expr( __colby__ ), colby[i]
  )
 )
);

Re: creating new columns with a for loop with column names and formula

I am still getting the same error, as below

Column B/A Formula Interrupted
Cannot convert argument to a number [or matrix] 1 times At rows: 2 Operation: Divide, Column( "B" ) /  /*###*/Column( "A" ) /*###*/
Formula evaluation errors have been ignored

Column C/B Formula Interrupted
Cannot convert argument to a number [or matrix] 1 times At rows: 2 Operation: Divide, Column( "C" ) /  /*###*/Column( "B" ) /*###*/
Formula evaluation errors have been ignored

Re: creating new columns with a for loop with column names and formula

Try changing the Column() function to As Column() function

Re: creating new columns with a for loop with column names and formula

That worked, thanks!