[Scilab-users] Wrong number of arguments? exclusive) to exclusive)

[Claus Futtrup]

Hi Buk

There are very nice features in Scilab to do the selective deletion of data.

For example make an array of boolean and extract good data.

BTW, I think I speak for the majority when I say it's Ok to post lots of
mails into the mailing list. Don't worry. Nobody wish for a "dead quiet"
mailing list :-)

Best regards,
Claus
On Apr 5, 2016 22:38, <scilab.20.browseruk at xoxy.net> wrote:

> Claus,
> >
> > You can convert the code for Barlett3p to a Median3p, simply by
> > replacing the weights (0.25 0.50 0.25) with equal weights ... i.e. 0.333
> > 0.334 0.333 ...
>
> I extrapolated a barlett5p() function from your example:
> function [out]=bartlett5p(indata)
>      out = indata;
>      if length(indata) > 3 then
>          out( 3:$-2 ) = 0.2 * indata( 1:$-4 ) + 0.2 * indata( 2:$-3 ) +
> 0.2 * indata( 3:$-2 ) + 0.2 * indata( 4:$-1 ) + 0.2 * indata( 5:$ );
>      end
> endfunction
>
> And tried various sets of weights: (0.1, 0.2, 0.4, 0.2, 0.2 etc.) before
> settling on the "median5p()" set above.
>
> The result (as shown in the attachment) is that whilst it addresses the
> cases where the barlett3p() leaves inflections in the dataset (albeit much
> reduced); it leaves inflections where the barlett3p() doesn't :(
>
> >
> > Someone suggested to compare the raw data with the smoothed data - and
> > determine persistent issues. Maybe delete the tricky data that doesn't
> > ensure convex space ... I think that's your best option because the
> > remaining data is true to your original data. If deleting a data point
> > is of concern - the alternative is to replace the bad data point with a
> > data point interpolated between the surrounding data.
>
> Yes. I'm rapidly coming to the conclusion that I need to stop looking for
> a continuous 'mathematical solution' to this problem and return to the
> prosaic, procedural code that detects negative slopes and simply deletes
> the points that cause them, that I had when when I first asked the question
> here.
>
> Since there doesn't seem to be any nice way of coding that in SciLab, and
> I'm vastly more comfortable in Perl, I'll code my solution there where I
> won't be running into anomalies that bring me back here asking dumb
> question every five minutes.
>
> Thanks for your time and observations; they've been very helpful.
>
> Cheers, Buk.
>
> ____________________________________________________________
> Can't remember your password? Do you need a strong and secure password?
> Use Password manager! It stores your passwords & protects your account.
> Check it out at http://mysecurelogon.com/manager
>
> _______________________________________________
> users mailing list
> users at lists.scilab.org
> http://lists.scilab.org/mailman/listinfo/users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.scilab.org/pipermail/users/attachments/20160406/cd1776d3/attachment.htm>