I am trying to multiply two colums with jsl script. But no success.
dt<<new column("C", continious, Formula(:A * :B));
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It looks like you have a spelling error. You might want to specify both the data and modeling type though. Here is an example:
Names default to here( 1 );
dt = open("$Sample_data/iris.jmp");
dt << New Column("Sepal length x width", Numeric, "Continuous", Formula(:Sepal length * :Sepal width));