[Kst] Skip

Barth Netterfield netterfield at astro.utoronto.ca
Mon Jan 24 14:40:35 CET 2005


Let me correct that:  The current code reads from the begining of the group, 
but skips sample 0, which it should not.

Is that the only bug?
cbn

On January 24, 2005 08:30 am, Barth Netterfield wrote:
> The intent is to 'read 1 sample every x frames' which both versions do. 
> Yours reads from the middle.  Have you identified any bugs in the current
> code?
>
> cbn
>
> On January 23, 2005 09:56 pm, George Staikos wrote:
> >   I have this [still under development] patch to kstrvector which I think
> > fixes many little bugs in skip.  Presently skip does some things that I
> > consider strange.  Behavior on a vector [0,1,2,...,11,12] does this for
> > given skip values:
> >
> > skip=2
> > 2,4,6,8,10
> > skip=3
> > 3,6,9
> > skip=4
> > 4,8
> > skip=5
> > 5
> > skip=6
> > 6
> > skip=7
> > 7
> > skip=8
> > 8
> >
> > I think the vectors should look like this, and my patch behaves
> > accordingly: skip=2
> > 1,3,5,7,9,11
> > skip=3
> > 2,5,8,11
> > skip=4
> > 3,7,11
> > skip=5
> > 4,9
> > skip=6
> > 5,11
> > skip=7
> > 6
> > skip=8
> > 7
> >
> > There is some numerical fudging in my patch also, but it only breaks down
> > in the case where skip=1 (I think).  I think doing skip where skip=1 is
> > silly anyway, and so my patch disables skip when it's set to 1 (or less,
> > as a sanity check).
> >
> > Any comments?  I haven't tested this code with anything other than my
> > "0..12" vector, and I haven't tested it with samplesPerFrame > 1.  I
> > guess it needs testing with various dirfiles.
>
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