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Re: problem with exam task for college

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From Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject Re: problem with exam task for college
Date Mon, 14 Jan 2013 13:54:59 -0500
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On Mon, 14 Jan 2013 08:01:03 -0800 (PST), jeltedeproft@hotmail.com
declaimed the following in gmane.comp.python.general:

> this is what i have right now, it tells me i can't multiply a vector with a vector, i have to find a way to multiply the speed with the updated angle (=hoek in dutch)
>

	It's a trite saying but:

	How would you perform this vector multiplication by hand? Write down
the steps... Now convert those steps into Python code.

	Or -- download/install something like NumPy and recode your program
using NumPy vector types which should support the needed
multiplications.
 
>>> import numpy
>>> a = numpy.array(	(2.78, 3.14, 1958)	)
>>> b = numpy.array(	(1.5, 2.0, 1.0)	)
>>> 
>>> a*b
array([    4.17,     6.28,  1958.  ])
>>> a.dot(b)
1968.45
>>> 
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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problem with exam task for college jeltedeproft@hotmail.com - 2013-01-04 10:23 -0800
  Re: problem with exam task for college Chris Angelico <rosuav@gmail.com> - 2013-01-05 05:59 +1100
  Re: problem with exam task for college Chris Angelico <rosuav@gmail.com> - 2013-01-05 06:00 +1100
  Re: problem with exam task for college MRAB <python@mrabarnett.plus.com> - 2013-01-04 19:17 +0000
  Re: problem with exam task for college Joshua Landau <joshua.landau.ws@gmail.com> - 2013-01-04 19:18 +0000
  Re: problem with exam task for college Chris Angelico <rosuav@gmail.com> - 2013-01-05 06:30 +1100
    Re: problem with exam task for college jeltedeproft@hotmail.com - 2013-01-04 12:01 -0800
      Re: problem with exam task for college Chris Angelico <rosuav@gmail.com> - 2013-01-05 07:36 +1100
      Re: problem with exam task for college Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-01-05 16:09 -0500
    Re: problem with exam task for college jeltedeproft@hotmail.com - 2013-01-04 12:01 -0800
  Re: problem with exam task for college Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-01-04 17:11 -0500
  Re: problem with exam task for college jeltedeproft@hotmail.com - 2013-01-05 04:24 -0800
    Re: problem with exam task for college Chris Angelico <rosuav@gmail.com> - 2013-01-05 23:39 +1100
  Re: problem with exam task for college jeltedeproft@hotmail.com - 2013-01-05 05:14 -0800
    Re: problem with exam task for college Chris Angelico <rosuav@gmail.com> - 2013-01-06 00:32 +1100
  Re: problem with exam task for college jeltedeproft@hotmail.com - 2013-01-07 08:22 -0800
    Re: problem with exam task for college Vincent Vande Vyvre <vincent.vandevyvre@swing.be> - 2013-01-07 18:40 +0100
    Re: problem with exam task for college Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-01-07 15:36 -0500
  Re: problem with exam task for college jeltedeproft_8@hotmail.com - 2013-01-13 04:29 -0800
  Re: problem with exam task for college jeltedeproft@hotmail.com - 2013-01-13 04:48 -0800
  Re: problem with exam task for college jeltedeproft@hotmail.com - 2013-01-13 05:57 -0800
    Re: problem with exam task for college Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-01-13 17:28 +0000
  Re: problem with exam task for college stefaang@gmail.com - 2013-01-14 04:57 -0800
  Re: problem with exam task for college jeltedeproft@hotmail.com - 2013-01-14 08:01 -0800
    Re: problem with exam task for college Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-01-14 13:54 -0500

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