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Re: fscanf accuracy for floats

From: David Bateman
Subject: Re: fscanf accuracy for floats
Date: Thu, 03 Jan 2008 22:03:07 +0100
User-agent: Thunderbird (X11/20060921)

gOS wrote:
> I'm attempting to read in data from a file: (ex, -0.285121188808)
> There are multiple columns in the file etc. And I'm able to import all of
> the data into Octave. The problem is that -0.285121188808 becomes -0.28512
> which is not precise enough for the calculations that need done with this
> data. I can't seem to find anyway to make this more accurate. I've switched
> between f,e, and g. I've tried multiple permutations of the format, and it
> just isn't panning out. It's worth noting that in Matlab -0.28512 is
> displayed on screen when printed, but the rest of the data is still there
> (multiply by 10 for isntance and you get -2.285121). Octave yields -2.28512.
> Is there a better way to do this, or does this qualify as a bug?

Have you tried using the "format long" command to see if all of the data
is really there and just truncated for display?


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