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Re: Problem with Position

  • To: mathgroup at
  • Subject: [mg119644] Re: Problem with Position
  • From: Leonid Shifrin <lshifr at>
  • Date: Thu, 16 Jun 2011 03:59:16 -0400 (EDT)
  • References: <>

Hi Dominic,

This is most likely a symbolic/numerical issue. Position is based on
symbolic rather than numeric comparisons.
You may have success with


Here is one of the most recent related discussions:


On Wed, Jun 15, 2011 at 3:20 PM, Dominic W=F6rner <
dominic.woerner at> wrote:

> Hi,
> I have to import data from a csv file. And I get a structure
> data[[rows]]={first, second,...}.
> Now I want to find the rows in which, say the first entry has a specific
> values.
> By just looking at the data there are for example entries with value
> 0.785398.
> But when I try Flatten@Position[data[[All,1]],0.785398] or with
> ToString[0.785398] I just get {}
> What's the problem here?
> Best,
> Dominic

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