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MathGroup Archive 2002

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Re: elementwise vector scalar subtraction

  • To: mathgroup at smc.vnet.net
  • Subject: [mg35645] Re: elementwise vector scalar subtraction
  • From: phbrf at t-online.de (Peter Breitfeld)
  • Date: Wed, 24 Jul 2002 02:06:10 -0400 (EDT)
  • References: <ahj04h$goi$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

O.A. Linares, M.D., Ph.D. schrieb:
> Dear Colleagues,
> 
> I have a t-vector
> 
> t = {0, 1, 1.5, 2, 2.5, 4, 6, 8, 10, 15, 20, 30};
> 
> I want to subtract 0.15 from each element except the first to get
> 
> tc15 = {0, 1 - 0.15, 1.50 - 0.15, 2 - 0.15, 2.5 - 0.15, 4 - 0.15, 6 -
> 0.15, 8 - 0.15, 10 - 0.15, 15 - 0.15, 20 - 0.15, 30 - 0.15};
>        
> I then want to subtract 0.20 to get
> 
> tc20 = {0, 1 - 0.20, 1.50 - 0.20, 2 - 0.20, 2.5 - 0.20, 4 - 0.20, 6 -
> 0.20, 8 - 0.20, 10 - 0.20, 15 - 0.20, 20 - 0.20, 30 - 0.20};
>        
> Is there a way to automate this process for n subtractions from 0.15
> to 0.30 to yield individual t-vectors for tc15 through tc30 ?
> 
> With Much Appreciation,
> 
> Oscar
> 

I don't know if this is the best way:

tc15=Flatten[{First[t],Subtract[Rest[t],0.2]}]

Gruß Peter
-- 
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 Peter Breitfeld, Bad Saulgau, Germany   Meinen GnuPG/PGP-5x Key gibts dort



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