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Re: How to remove the "0." from "0. + 1.41774i"

• To: mathgroup at smc.vnet.net
• Subject: [mg131264] Re: How to remove the "0." from "0. + 1.41774i"
• From: Richard Fateman <fateman at cs.berkeley.edu>
• Date: Sat, 22 Jun 2013 03:33:48 -0400 (EDT)
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• References: <20130620084452.627F569EF@smc.vnet.net> <58732FA6-FDFE-4100-8637-926219C678F6@gmail.com> <CAJxy_SqurCkArZaLNQDN+35u3YT8XjAL7g7wsL9cvnSOV9MLKg@mail.gmail.com> <kq17bv$goc$1@smc.vnet.net>

1.  Mathematica 7.0 performs differently.

4.0*I  looks like 4.I

Mathematica 9. does this..
4.0*I looks like
   0.+4.I

2.  If you want to do something different, consider something
like this:

  f[x_Complex]: If [VerySmall[Re[x]], Im[x]*i, Re[x]+Im[x]*i]

where VerySmall is defined as you wish.  Could be  VerySmall(x_]:=x==0.0 
  for example.

Note that the answers are no longer complex numbers because they involve
the symbol i   not I.

You can do   %/. i->I
but then you will see 0.+4.I  again.

RJF

• Follow-Ups:
  • Re: How to remove the "0." from "0. + 1.41774i"
    • From: Christoph Lhotka <christoph.lhotka@univie.ac.at>

• References:
  • How to remove the "0." from "0. + 1.41774i"
    • From: Mike Bayville <mike.bayville@gmail.com>