Hi,

Thanks everyone for the answers!
I was able to identify my R free sets and they are the same =D

Best regards

Mariana

________________________________
De: CCP4 bulletin board <[email protected]> em nome de Eleanor Dodson 
<[email protected]>
Enviado: terça-feira, 17 de setembro de 2019 11:29
Para: [email protected] <[email protected]>
Assunto: Re: [ccp4bb] Rfree from another mtz file

If you use either GUI2 or GUI you simply name the old file you want to take the 
FreeR flags from..

The pipeline then initiates the steps catalogued by Robbie..

Eleanor
As Tim, and others say, you can assign new FreeR flags, but dont get upset when 
starting refinement with the prevuis model you see the Free R steadily 
increasing with refinement for several cycles!
Eleanor

On Tue, 17 Sep 2019 at 06:15, Robbie Joosten 
<[email protected]<mailto:[email protected]>> wrote:
I totally agree. And because the new dataset is of higher resolution, there 
will be new reflections in the test set anyway.

Now if you want to use the same testset always for series of isomorphous 
datasets (even though you do not need to), you can do this:
- Use unique to make a full set of reflections given your space group and cell 
dimensions
- Assign a testset to that file using the program freerflag
Foreach dataset:
- Copy over the testset from you master file
End

Note that the testsets in the datasets will be super/subsets of each other but 
assuming the data are complete they will be the same if you use the same 
resolution cut-offs.

Cheers,
Robbie

On 17 Sep 2019 02:17, Tim Gruene 
<[email protected]<mailto:[email protected]>> wrote:

Dear Mariana,

you can simply create a new set for Rfree, independently of the previous one.
It will be as good as the copied one, and there is no reason why you would
need to maintain the same flags. As Ian Tickle explained only briefly ago,
your new data set will have new, independent errors.

Best regards,
Tim

On Tuesday, September 17, 2019 12:29:19 AM CEST Mariana Ajalla wrote:
> Dear all,
>
> We tried to use the Rfree set from a lower resolution data with a higher
> resolution from the same Crystal. To do so We used aimless at ccp4i with
> the option use free flag from another mtz file and extend the data.
>
> I think it worked, but now we don't know how to be sure we have the same
> Rfree set. Does anyone have a way to prove it?
> Thank you in advance,
> Best,
> Mariana
>
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--
--
Tim Gruene
Head of the Centre for X-ray Structure Analysis
Faculty of Chemistry
University of Vienna

Phone: +43-1-4277-70202

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