Hello,
Thanks for your suggestion. It seems that a fitting complex data is not
possible with grace. It's possible to fit one curve at a time (real, or
imaginary, separately).
Best Regards,
Matt
On Tue, 3 Jul 2007, Andreas Wilde wrote:
matt wrote:
Hello,
I have the following data for a lossy material (nylon), and I'd like to
find the parameters for meep's lorentzian model which fit the data:
frequency (hz) real(eps) imag(eps)
60 3.7 -.0666
1e3 3.5 -.0651
1e6 3.14 -.068452
1e8 3.0 -.06
3e9 2.84 -.033228
2.5e10 2.73 -.028665
There was an indication in a previous post that this is simple:
G.J. Parker
original patch posted by Steven, this does reduce memory requirements when
using Lorentzians. i have no problems using five Lorentzians w/ this patch.
one can write a stupid excel spread sheet to fit N lorentzians to a table of
(experimental) complex epsilons...
Best Regards,
Matt
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Hello,
under Unix/Linux you could use xmgrace to fit the parameters of the
model. I don´t know if this is better or worse than using a spreadsheet,
but it should be one possibility.
andreas
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