In the newer versions, NESSY automatically performs a global fit if more
than one experiment is set up completely.
Cheers
Michael
Am 31.08.2012 06:09, schrieb James Nyirenda:
Thanks Michael.
I am able to do some testing.
The first version has a "perform a global fit" button but concurrent
versions don't. what is the equivalent? The latest has model 6 and 7
in the place where the "perform a global fit" button was. Whats the take?
------------------------------------------------------------------------
Date: Thu, 30 Aug 2012 20:06:25 +0200
From: [email protected]
To: [email protected]
CC: [email protected]
Subject: Re: nessy software
Hi Keith
Welcome to the mailing list. To make use of the list, you should write
the mails @ nessy-users(at)gna.org to make the conversation public to
other users.
I will answer you questions below:
Am 29.08.2012 03:33, schrieb James Nyirenda:
Hi Michael,
Iam new on the mailing list and i wanted to find out the following:
1. How do you carter for error? suppose you perform a duplicate
cpmg disp expt, how do you input the errors generated?
Yes, several duplicates have to be recorded at different cpmg
frequencies. You can the load each peaklist into the data tab with the
corresponding cpmg frequency set up in the set up experiment section.
NESSY automatically detects the repetitions (ie data recorded at the
same frequency).
2. With the synthetic data generated, i could not correlate the
results with those in the manuscript at 5% error e.g in the
"Final tab" R2 is 15.311 err is 0.27 .. while in the paper its
15.18 err 0.03 for model 3 at 5%. Or should i assume that
synthetic data generation in the nessy software is random?
I am surprised that you get such a different error. But yes, data is
generated randomly. It also might be a difference whether you
generated the on Linux, Mac or Windows. I have generated them on Linux
(Ubuntu).
3. The frequencies of the cpmg in the "summary tab" for R2 eff
seem to be offset by 1 that is the frequencies start at 0, 25, 50
.. and the R2 eff values rather start in the 50Hz column than the
25 Hz column.
This is a bug! Thanks for reporting it!
4. How do you perform experiments with 2 static fields and have
the plots appear on one as in your manuscript.
The plots are generated automatically. You will have to set up a data
set for each experiment. You can do this either by the '+' button in
the tool bar or in the data menu (add experiment). You will have to
specify the static field for the X atom and NESSY will scale the data
accordingly and perform a global fit using all specified fields.
I hope this helps.
Cheers
Michael
Are you able to get what am trying to communicate?
I am afraid am no where near programming and often am an end user.
Find attached the screen shots
Kind regards Keith J.
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