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inputing nothing in a manipulate box

  • To: mathgroup at smc.vnet.net
  • Subject: [mg101733] inputing nothing in a manipulate box
  • From: Lobotomy <labbman at gmail.com>
  • Date: Wed, 15 Jul 2009 07:12:16 -0400 (EDT)

If you have a Manipulate command with a function generating a graph
and then input nothing there will be an error. nothing=!=0 in this
case. with nothing i mean, erasing whatever number is there and
pressing enter without entering 0 or any other number.

how can this be solved? i want that nothing == 0 in my calculations
when one uses the input box


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