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MathGroup Archive 2005

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RE: computing cumulative sum for list

  • To: mathgroup at smc.vnet.net
  • Subject: [mg54434] RE: [mg54367] computing cumulative sum for list
  • From: "David Park" <djmp at earthlink.net>
  • Date: Sun, 20 Feb 2005 00:10:02 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Uwe,

You're going to get a lot of answers to this. 

FoldList[Plus, 0, {1, 2, 3, 4, 5}]
{0, 1, 3, 6, 10, 15}

If you don't want the leading zero...

Drop[FoldList[Plus, 0, {1, 2, 3, 4, 5}], 1]
{1, 3, 6, 10, 15}

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/ 



From: Uwe Ziegenhagen [mailto:newsgroup at ziegenhagen.info]
To: mathgroup at smc.vnet.net

Hello,

I would like to compute the cumulative sum for a list, but do not find 
the command.

For

{1,2,3,4,5}

I would like to get

{1,3,4,10,15}


Is there nothing builtin in Mathematica? I already looked in lists and 
matrices and Google...

Uwe

-- 

mail to newsgroup at ziegenhagen.info is read only from time to time. If 
you need an urgent answer, google for me.




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