Kratky and Porod +/- errors

Interactive and automated data processing tools (PRIMUS, GNOM, AUTORG).
Scattering from simple bodies (BODIES), peak analysis (PEAK), data plotting (SASPLOT) etc.
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marie
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Posts: 4
Joined: 2015.11.05 20:04

Kratky and Porod +/- errors

#1 Post by marie » 2016.05.10 21:00

Hello

I want to plot the Kratky plot with its corresponding error bars. How can I obtain a Kratky data file that provides me with the corresponding error? (ex. the .out file provides me with the error for the P(r), and the .dat file provides me with the Scattering error)

I also want to do the same for the Porod plot.

Thank you,
Marie

ckerr
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Joined: 2015.03.25 09:03
Location: EMBL Hamburg

Re: Kratky and Porod +/- errors

#2 Post by ckerr » 2016.05.11 08:11

To get a Kratky plot you multiply the I(s) by s^2 - so (assuming you know s more-or-less exactly) you just multiply the errors by s^2 too.
For a normalised Kratky plot you also have to account for possible errors in the I0 and Rg used in the normalisation.

For the Porod plot you do the same but for s^4

marie
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Posts: 4
Joined: 2015.11.05 20:04

Re: Kratky and Porod +/- errors

#3 Post by marie » 2016.05.14 21:07

Thank you very much!!!

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