Add angular frequency #63

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1. hgrecco commented on Sep 12, 2013

   

   hgrecco

   on Sep 12, 2013

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   The problem is that it will class with

   hertz = 1 / second
   

   This is sometimes called cycles_per_second. We could also call it angular_hertz, but I have never heard such name.
2. cbrunet commented on Sep 13, 2013

   

   cbrunet

   on Sep 13, 2013

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   I see...

   I was trying to use pint to perform convertions between wavelength (nm), frequencies (THz), angular frequencies (rad/s), and wave number (m**-1). What I realize is that it cannot be done automatically. I can use the units, but I have to explicitly enter the formulas for convertions. This is probably my misunderstanding of what pint is. Sorry for the noise.
3. cbrunet

   closed this as completedon Sep 13, 2013
4. hgrecco commented on Sep 13, 2013

   

   hgrecco

   on Sep 13, 2013

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   Thanks for your comments. It is funny that you mention this because I was writing an enhancement proposal in this regard. Take a look at: #65
5. cbrunet commented on Sep 13, 2013

   

   cbrunet

   on Sep 13, 2013

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   I rethought about that, and I think that hertz should be defined as cycle / second instead of 1 / second. Since cycle already is defined as 2 * pi * radian, it would allow to convert hertz to radian / second, to rpm, and to cps.
6. cbrunet

   reopened this on Sep 13, 2013
7. hgrecco commented on Sep 13, 2013

   

   hgrecco

   on Sep 13, 2013

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   But the problem is that hertz is the inverse of second. It is not a good idea to redefine it in the canonical list included with pint as it will break user expectations. Converting from frequency to angular frequency is not really a unit conversion problem. It is a relation between physical quantities. Both have the same units: 1/second.
8. hgrecco

   closed this as completedon Nov 7, 2013