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From: dpb <none@non.net>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Effect of sampling frequency for FFT
Date: Fri, 30 Oct 2009 17:39:04 -0500
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juho salminen wrote:
...

> For example, 1. I sample some artificial noisy sine wave with 50Hz,
> and I collect 5000samples, 2. I sample some artificial sine wave with
> 200Hz, and I collect 5000samples, the second case gives more accurate
> amplitude results in FFT

That is, in essence, the same effect as fitting any function--you've got 
more information to work with that defines the resolution of the shape 
of the curve more distinctly.

--