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Re: Gettting Rid of units

  • To: mathgroup at smc.vnet.net
  • Subject: [mg16620] Re: [mg16506] Gettting Rid of units
  • From: BobHanlon at aol.com
  • Date: Fri, 19 Mar 1999 12:53:48 -0500
  • Sender: owner-wri-mathgroup at wolfram.com

In a message dated 3/16/99 5:48:42 PM, rlove at antispam.neosoft.com writes:

>I have a function I can call that returns a list of angles
>with "Degree" attached, like this:
> 
>  {96.231 Degree, 96.8642 Degree...}
>
>I can't see how to remove the "Degree" unit.  What I want is a
>list of pure values.  I confess I don't know how the unit is
>attached and I don't have source for the function called.
>
>Somebody plz provide a simple explantion of how to remove the 
>label "Degree"  and maybe pointers on what to read to learn how
>this was attached in the first place.
>

Bob,

Degree is just a constant which, when used as a multiplier, converts 
degrees to radians

N[90 Degree - Pi/2]

0.

data = Table[k* 10 Degree, {k, 0, 18}]

{0, 10*Degree, 20*Degree, 30*Degree, 40*Degree, 50*Degree, 
  60*Degree, 70*Degree, 80*Degree, 90*Degree, 100*Degree, 
  110*Degree, 120*Degree, 130*Degree, 140*Degree, 
  150*Degree, 160*Degree, 170*Degree, 180*Degree}

N[data]

{0, 0.1745329251994329, 0.3490658503988659, 
  0.5235987755982987, 0.6981317007977318, 
  0.8726646259971648, 1.047197551196597, 1.22173047639603, 
  1.396263401595463, 1.570796326794896, 1.745329251994329, 
  1.919862177193762, 2.094395102393195, 2.268928027592628, 
  2.443460952792061, 2.617993877991494, 2.792526803190927, 
  2.96705972839036, 3.141592653589793}

If you want to plot degrees rather than radians, just divide out the 
conversion factor

ListPlot[data/Degree, PlotJoined -> True];


Bob Hanlon


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