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Re: How to get result in shape of fraction in Mathematica 4.2
*To*: mathgroup at smc.vnet.net
*Subject*: [mg91599] Re: How to get result in shape of fraction in Mathematica 4.2
*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
*Date*: Thu, 28 Aug 2008 07:40:00 -0400 (EDT)
*Organization*: The Open University, Milton Keynes, UK
*References*: <g95k9b$54b$1@smc.vnet.net>
b wrote:
> When I calculate something I would like to get result in shape of fraction;
> Like 1/2 not 0.5.
>
> How??
The best method to get exact results is to use infinite precision
numbers [1], i.e. 314/100 rather than 3.14 or 2 rather than 2. or 2.0
Also you could set system variables such as *$Post* [2] or $PrePrint to
Rationalize (or Rationalize[#, 0]&).
In[1]:= 1 - 1/2
Out[1]= 1/2
In[2]:= 2*314/100
Out[2]= 157/25
In[3]:= $Post = Rationalize;
In[4]:= 1 - .5
Out[4]= 1/2
In[5]:= 2*3.14
Out[5]= 157/25
In[6]:= $Post =.;
Regards,
- Jean-Marc
[1]
http://reference.wolfram.com/mathematica/tutorial/ArbitraryPrecisionNumbers.html
[2] http://reference.wolfram.com/mathematica/ref/$Post.html
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