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MathGroup Archive 2005

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Re: Converting Rationals into Reals

  • To: mathgroup at smc.vnet.net
  • Subject: [mg62037] Re: Converting Rationals into Reals
  • From: Peter Pein <petsie at dordos.net>
  • Date: Wed, 9 Nov 2005 05:05:58 -0500 (EST)
  • References: <dksdsr$ha8$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

kristoph schrieb:
> I would like to know how I can convert rationals into reals with four
> digits. I know this sounds stange but I need the numbers for a diagram.
> 
> If anyone knows how to covert a whole list of rationals into into four
> digit reals I would be very happy.
> 
> Thank you very much for help.
> Kristoph
> 
Hi Kristoph

In[1]:=
  rat = Table[Random[Integer, {-10, 10}]/Random[Integer, {1, 10}], {7}]
Out[1]=
{-1, -(3/8), -(1/4), 5/4, 1/3, 1, 7/4}

In[2]:=
  PaddedForm[N[#], {7, 4}, NumberPadding -> {" ", "0"}]& /@ rat
Out[2]=
{ -1.0000, -0.3750, -0.2500,  1.2500,  0.3333,  1.0000,  1.7500}

Peter


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