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Re: [gpsd-dev] ✘CEP(50) 0.009 meters


From: Gary E. Miller
Subject: Re: [gpsd-dev] ✘CEP(50) 0.009 meters
Date: Mon, 25 Jul 2016 19:22:01 -0700

Yo Hal!

On Mon, 25 Jul 2016 18:48:59 -0700
Hal Murray <address@hidden> wrote:

> > Works for me: %.9f  
> 
> 9 is a small number.

Yup!  One or two more than I need.  7 is about a centi-meter.

> What I was trying to say is that if you print out a number and read
> it back in, you may not get the same low order bits.  If they matter,
> you may get a different result if you work with the numbers before
> printout as compared to reading in the numbers in and doing the same
> computation.

I'm not seeing that in Python.  Not seen that in C for a long time.

But that is why I'm unsing %.9f when I only need %.7f

I'm not that worried if I get 1.999999999 instead of 2.000000000

> If it matters, print it out in hex.

Is there a standard for import/export of IETF 754 in hex?

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

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