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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125103] Re: How to Multiply a Sequence of #s that depends on the previous #
  • From: Bob Hanlon <hanlonr357 at gmail.com>
  • Date: Tue, 21 Feb 2012 06:16:33 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

list = {a, b, c, d};

FoldList[Times, init, list] // Rest

{a init, a b init, a b c init, a b c d init}

FoldList[Times, init*First[list], Rest[list]]

{a init, a b init, a b c init, a b c d init}

% == %%

True


Bob Hanlon

On Mon, Feb 20, 2012 at 2:46 AM, Clutch <clutchderivative 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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