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Sum specific columns in each row

I would like to sum specific columns in each row.

I can find the maximum value in each row using the below :

location =  Loc Max( dt[r, {a,b,c} );

 

but cannot use the sum 

Total = Sum( dt[r, {a,b,c} );

Re: Sum specific columns in each row

Maybe a missing ] ?  This works for me.

dt=open("$sample_data/big class.jmp");
sum(dt[3,{height,weight,age}]);

Maybe the r variable is uninitialized. Use show(r); to see what it is. Check the JMP log window for messages. 

Not sure why you would add these togetherNot sure why you would add these togetherNot sure why you would add these together

 

Re: Sum specific columns in each row

Worked around, by hard coding the column names :

For Each Row(
r = Row();

Column = (:Name( "COL1" )) / (:Name( "COL23" ) + :Name( "COL24" ) + :Name( "COL25" )) ;

);