Re: Map function which adds last two numbers of a list
- To: mathgroup at smc.vnet.net
- Subject: [mg73559] Re: Map function which adds last two numbers of a list
- From: dh <dh at metrohm.ch>
- Date: Wed, 21 Feb 2007 06:08:46 -0500 (EST)
- References: <ergqrb$jg0$1@smc.vnet.net>
Hi Christopher,
write a function that takes a list and replaces its last 2 elements by
their sum. Then map this function to z:
Append[Drop[#, -2], #[[-1]] + #[[-2]]]& /@ z
Daniel
Christopher Pike wrote:
> 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
>