Hi Tim,
You could create a freerflag column of the right length outside CCP4 and then just import it into CCP4. That would save you a lot of scripting inside CCP4 context.
Cheers,
Robbie
-----Original Message-----
From: Tim Gruene [mailto:[log in to unmask]]
Sent: Tuesday, January 31, 2017 03:29
To: Robbie Joosten
Cc: [log in to unmask]
Subject: Re: [ccp4bb] variation in freerflag
Hi Robbie,
I had long wondered how to flag the fields in game minesweeper with a deterministic algorithm. When I read about 'random sort and bin' I though this was quite a beautiful way. I wonder if there is any reason behind not doing it this way in freerflag.
Assigning the flags randomly this way in a manual manner (CAD?) probably requires some tedious scripting, doesn't it?
Best,
Tim
On Monday, January 30, 2017 9:45:40 PM CET Robbie Joosten wrote:
> Hi Tim,
>
>
>
> I was discussing that with a student today, because we observe the
> same thing when we make test sets for k-fold cross validation. It is
> an implementation choice. You can random sort and then bin, or you can
> assign a random number to each reflection and translate that to a bin.
> The latter is fine for large bins, but not for small ones like the
> ones you are making.
>
>
>
> Cheers,
>
> Robbie
>
>
>
>
>
>
>
> Sent from my Windows 10 phone
>
>
>
> Van: Tim Gruene<mailto:[log in to unmask]>
> Verzonden: maandag 30 januari 2017 21:03
> Aan: [log in to unmask]<mailto:[log in to unmask]>
> Onderwerp: [ccp4bb] variation in freerflag
>
>
>
> Dear all,
>
> when I ran freerflag with the keyword FREERFRAC 0.002, the number of
> reflection per flag (between 0 and 500) is very high, it varies
> between 17 and 1.
>
> Why is there such a high variation, instead of flagging always the
> same number of reflections per flag (6-7 in my case)? Can the
> distribution be made evenly?
>
> Best regards,
> Tim
> --
> --
> Paul Scherrer Institut
> Tim Gruene
> - persoenlich -
> OFLC/102
> CH-5232 Villigen PSI
> phone: +41 (0)56 310 5297
>
> GPG Key ID = A46BEE1A
--
--
Paul Scherrer Institut
Tim Gruene
- persoenlich -
OFLC/102
CH-5232 Villigen PSI
phone: +41 (0)56 310 5297
GPG Key ID = A46BEE1A
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