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MathGroup Archive 2007

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Map function which adds last two numbers of a list

  • To: mathgroup at smc.vnet.net
  • Subject: [mg73530] Map function which adds last two numbers of a list
  • From: "Christopher Pike" <crpike at ucdavis.edu>
  • Date: Wed, 21 Feb 2007 01:46:42 -0500 (EST)

Hi,
  Consider this:

z = {{1,4,5,6},{7,8,9,1},{1,2,4,3}}

I'd like to Map a function onto z which would replace the last two items
with their sum:

{{1,4,11},{7,8,10},{1,2,7}}

I could easily use the Table command to construct this new table, but it
would be nicer if I new how to Map some function on z that would produce
the same result.

Any suggestions.

Thanks, Chris Pike


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