MathGroup Archive 2009

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Replace specific element with specific value.


Hi,

data /. {x -> x + xx, y -> y + yy, z -> z + zz}

?

Regards
   Jens

nick.maj at mssm.edu wrote:
> I tried this code, it gives me right and wrong results spreeded into
> nested lists.
> 
> data = {{0, 2}, {2, x}, {3, 4}, {4, 6}, {6, y}, {8, 9}, {9, z}}
> 
> Table[{#1, #2 + Which[#2 === j, i, #2 =!= j, 0]} & @@@
>   data, {i, {xx, yy, zz}}, {j, {x, y, z}}]
> 
> needed output:
> 
> {0, 2}, {2, x+xx}, {3, 4}, {4, 6}, {6, y+yy}, {8, 9}, {9, z+zz}}
> 
> While searching only the second element of each list, if x is found
> add xx and if y is found add yy to it etc.
> 
> How to. Thanks in advance, Nick.
> 


  • Prev by Date: second simple problem - clarification
  • Next by Date: Problem with 3d graphics on Linux
  • Previous by thread: Re: Replace specific element with specific value.
  • Next by thread: Re: Replace specific element with specific value.