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September 10th, 2011, 09:10 PM  #1 
Joined: Mar 2011 Posts: 23 Thanks: 0  Mathematica Table item number
I need to define some "Tables" in Mathematica, in which some elements contains their own item number, like the following example below (the letters are arbitrary numbers) : A := {a, b, 3 c, d} B := {1, b, c, 4} C := {a, b, c, 4, d, 6} D := {a, 2, c, d, 5, g} How can I do this ? I'm looking for something like M := {a, b, c, ItemNumber, d, e, ...}. I can't put the number myself by hand, since the Tables are generated by another Mathematica code. To be more precise (sorry for my bad English) : What I'm looking for is a way to make Mathematica tell what is the position of a given element in a table. For some elements, I want the elementposition in the table to be printed, in the table itself. Say we have this Table : A := {123, 215, 456, 786} I need to change it to something ike this : A := {123, 2, 456, 4} The second and fourth elements were changed by their positionnumber in their table. 

Tags 
item, mathematica, number, table 
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