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What is wrong with 2Pi?

• To: mathgroup at smc.vnet.net
• Subject: [mg131139] What is wrong with 2Pi?
• From: Alexei Boulbitch <Alexei.Boulbitch at iee.lu>
• Date: Fri, 14 Jun 2013 04:58:55 -0400 (EDT)
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Dear community,

This works:

Manipulate[
 Plot[Sin[a x], {x, 0, 4 Pi}], {{a, 1}, 0, 6.28,
  VerticalGauge[##, ImageSize -> 50] &}, ControlPlacement -> Left]

This

Manipulate[
 Plot[Sin[a x], {x, 0, 4 Pi}], {{a, 1}, 0, 2 \[Pi],
  VerticalGauge[##, ImageSize -> 50] &}, ControlPlacement -> Left]

however, does not work. I cannot move the gauge in this latter case, while it is easy to move it in the former one.

So, if I am right, is it Pi placed instead of 6.28 that disturbs the functioning? Please check it. Looks like a bug.

Alexei


Alexei BOULBITCH, Dr., habil.
IEE S.A.
ZAE Weiergewan,
11, rue Edmond Reuter,
L-5326 Contern, LUXEMBOURG

Office phone :  +352-2454-2566
Office fax:       +352-2454-3566
mobile phone:  +49 151 52 40 66 44

e-mail: alexei.boulbitch at iee.lu

• Follow-Ups:
  • Re: What is wrong with 2Pi?
    • From: Bob Hanlon <hanlonr357@gmail.com>