How to modify(overwrite) existing column with formula in datatable

[#1]

Hi,

I 'm new to JMP and would like to know how can I modify one of a column in my data table. Let's say we have iris data and would like to divide Petal length column / 100. I opened formula tab by right clicking Petal lenght and input my formula. In the end I got • in the column. What is the correct way to do this ?
thanks

[#2]

I strongly recommend you go through the JMP Welcome Kit

     Help==>JMP on the Web==>JMP Welcome Kit

and take the time to read the documentation, Discovering JMP and Using JMP.

     Help==>JMP Documentation Library