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Re: How to Multiply a Sequence of #s that depends on the previous #

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125093] Re: How to Multiply a Sequence of #s that depends on the previous #
  • From: David Reiss <dbreiss at gmail.com>
  • Date: Tue, 21 Feb 2012 06:13:04 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jhstr1$nj5$1@smc.vnet.net>

One approach is to use FoldList:


In[1]:= FoldList[Times, 50, {1.10, 1.15, 1.20, 1.35}]

Out[1]= {50, 55., 63.25, 75.9, 102.465}

In[2]:= FoldList[Times, 50, {a, b, c, d}]

Out[2]= {50, 50 a, 50 a b, 50 a b c, 50 a b c d}

--David


On Feb 20, 2:47 am, Clutch <clutchderivat... at gmail.com> wrote:
> I have a list of #s : 1.10, 1.15, 1.20, 1.35.
>
> I start off with 50 and the first # is 50 * 1.10.
> The second # is the first # * 1.15.
> The third # is the second # * 1.20.
> The fourth # is the third # * 1.35.
>
> I want to maintain a list of these #s.
> How can this be done efficiently in Mathematica without running for loops?




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