[Kst] Interpolation

[Peter Kümmel]

On 13.05.2014 09:46, Peter Kümmel wrote:
> On 13.05.2014 08:33, Brisset, Nicolas wrote:
>> Hi Steve,
>>
>> I tried it as well and noticed the same as Barth. Even if the plugin does not always crash, it returns NaN vectors. We
>> need to fix the crash, but for the NaNs the best we can do is probably skip (or interpolate) them as Barth suggested.
>> However, I have one hint for your case where actually the sampling is different: you could use the range settings to
>> skip every other point on reading the vector.
>> In the page where you select the type of plots and the ranges (after you've selected the vectors), in the upper part
>> you could set Start to 0, and click the "Read 1 sanple per" box and set 2 frames in the spinbox right to it. Then kst
>> skips the NaNs.
>>
>> Nicolas
>
> There are already radio boxes to select what number to use when a string could not be parsed,
> we could this setting also use for non-existing numbers: null, nan, or last value.
>

Changed it to this.

> Peter
>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: kst-bounces at kde.org [mailto:kst-bounces at kde.org] Im Auftrag von Barth Netterfield
>> Gesendet: Montag, 12. Mai 2014 22:50
>> An: kst at kde.org
>> Betreff: Re: [Kst] Interpolation
>>
>> Hi Steve,
>>
>> Hmm.... Unfortunately, it turns out that Kst does not really support your case here :-(
>>
>> The missing values are interpreted as NaNs (which seems pretty reasonable).
>> But the interpolation plugin does not support NaNs (and crashes).
>>
>> The crashes in the existing plugins are bugs which should be fixed.  I think the fix could be done so that it would
>> automatically be able to have them interpolate over NaNs.
>>
>> So: Could you submit this as a bug so we don't forget about it?
>>
>> cbn
>>
>> On May 10, 2014 5:36:57 PM Steve Maher wrote:
>>
>>> Hi all,
>>>
>>> I can't seem to perform any interpolations.   My test crashes on 2.0.7-1 on
>>> Ubuntu and 2.0.8rc2 on Windows 8.1.
>>>
>>> Attached (and below) is my (ASCII)  test case.  There are 13 values in
>>> vector 'a' (and INDEX, of course).  There are seven values in vectors 'b'
>>> and 'bi'.  Vector 'bi' contains index numbers for vector b.  Looking
>>> at the data you can see the intention is that vector b has values for
>>> every other 'a' value and bi is the index of those values relative to 'a'.
>>>
>>> My goal is to interpolate 'b' so that it has the same number of
>>> samples as 'a', then use 'b' as an X axis of a curve with 'a' as the Y axis.
>>>
>>> So I try interpolating with Input Vector X = bi, Input Vector Y = b,
>>> and Input Vector X' = INDEX.  This crashes no matter which
>>> interpolation plugin I use.
>>>
>>> Seeing NaN's when looking at the 'b' and 'bi' vectors may be an issue.
>>>   However, I'm assuming since there are interpolation plugins there
>>> must be SOME way to have vectors of varying lengths.
>>>
>>> I must be missing something.
>>>
>>> Thanks for any tips,
>>> Steve
>>>
>>> a b bi
>>> 112.5 428 0
>>> 187.5
>>> 262.5 345 2
>>> 337.5
>>> 412.5 119 4
>>> 487.5
>>> 567.5 162 6
>>> 637.5
>>> 712.5 211 8
>>> 787.5
>>> 862.5 292 10
>>> 937.5
>>> 100.5 623 12
>>
>> --
>> Barth Netterfield
>> University of Toronto
>> 416-845-0946
>> _______________________________________________
>> Kst mailing list
>> Kst at kde.org
>> https://mail.kde.org/mailman/listinfo/kst
>> AIRBUS HELICOPTERS DEUTSCHLAND GmbH
>> Sitz der Gesellschaft / Registered Office: Donauwörth
>> Registergericht / Registration Court: Amtsgericht Augsburg HRB 16508
>> Vorsitzender des Aufsichtsrates / Chairman of the Supervisory Board: Guillaume Faury
>> Geschäftsführung / Board of Management:
>> Dr. Wolfgang Schoder, Vorsitzender / CEO; Friedrich-Wilhelm Hormel; Ralf Barnscheidt; Oliver Schenzle
>>
>>
>> CONFIDENTIALITY NOTICE
>>
>> This communication and the information it contains is intended for the addressee ( s ) named above and for no other
>> persons or organizations.
>> It is confidential and may be legally privileged and protected by law. The unauthorized use, copying or disclosure of
>> this communication
>> or any part of it is prohibited and may be unlawful.
>> If you have received this communication in error, kindly notify us by return e-mail and discard and/or delete the
>> communication.
>> Thank you very much.
>> It is possible for e-mails to be intercepted or affected by viruses. Whilst we maintain virus checks on our e-mails,
>> we accept no liability for viruses
>> or other material which might be introduced with this message.
>> _______________________________________________
>> Kst mailing list
>> Kst at kde.org
>> https://mail.kde.org/mailman/listinfo/kst
>>
>
> _______________________________________________
> Kst mailing list
> Kst at kde.org
> https://mail.kde.org/mailman/listinfo/kst
>