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help for time series basic operations

• To: mathgroup at smc.vnet.net
• Subject: [mg46046] help for time series basic operations
• From: "paolo" <tarpanelli at libero.it>
• Date: Tue, 3 Feb 2004 18:20:50 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

I am a quantitative analyst and for the first time i am using Mathematica. So, I
am sorry if my question seem "very easy (almost stupid)" but i need some helps
to begin to understand Mathematica

I have a time series 
a:=[a_1,a_2,a_3,a_4,...a_n]
how can i do to subtract each element for the previous one?:

b:=[a_2 - a_1, a_3 - a_2, a_4 - a_3,.....,a_n - a_n-1]

Thanks

Paolo Tarpanelli

• Follow-Ups:
  • Re: help for time series basic operations
    • From: János Löbb <janos.lobb@yale.edu>
  • Re: help for time series basic operations
    • From: Yasvir Tesiram <tesiramy@omrf.ouhsc.edu>