Generating a vector from successive multiplications of another vector from an initial value

From	Paulo da Silva <p_s_d_a_s_i_l_v_a_ns@netcabo.pt>
Newsgroups	comp.lang.python
Subject	Generating a vector from successive multiplications of another vector from an initial value
Date	2015-10-01 21:45 +0100
Organization	Aioe.org NNTP Server
Message-ID	<muk61h$eka$1@speranza.aioe.org> (permalink)

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Hi all.

What is the fastest way to do the following:

I have an initial value V and a vector vec of (financial) indexes.
I want to generate a new vector nvec as

V, V*vec[0], V*vec[0]*vec[1], V*vec[0]*vec[1]*vec[2], ...

A numpy vectorized solution would be better.

Thanks

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Generating a vector from successive multiplications of another vector from an initial value Paulo da Silva <p_s_d_a_s_i_l_v_a_ns@netcabo.pt> - 2015-10-01 21:45 +0100
  Re: Generating a vector from successive multiplications of another vector from an initial value Ian Kelly <ian.g.kelly@gmail.com> - 2015-10-01 15:10 -0600
  Re: Generating a vector from successive multiplications of another vector from an initial value duncan smith <buzzard@invalid.invalid> - 2015-10-02 00:44 +0100
  Re: Generating a vector from successive multiplications of another vector from an initial value Paulo da Silva <p_s_d_a_s_i_l_v_a_ns@netcabo.pt> - 2015-10-02 02:01 +0100

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