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MathGroup Archive 2009

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Re: Series of Percentage Changes

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96836] Re: Series of Percentage Changes
  • From: Raffy <raffy at mac.com>
  • Date: Thu, 26 Feb 2009 07:52:06 -0500 (EST)
  • References: <go31da$f5u$1@smc.vnet.net>

pchg[v_List, h_: "NA"] := Quiet@MapThread[Check[#1/#2 - 1, h] &, {Rest
[v], Most[v]}];


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