[R] help

[PIKAL Petr]

Hi

You have got an extensive explanation by Frede Aakmann Tøgersen. I consider it pretty strightforward and I do not have anything to add.

Do not expect that somebody can change your result, if your data does not support it.

Regards
Petr


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of javad bayat
> Sent: Tuesday, January 07, 2014 4:24 PM
> To: R-help at r-project.org
> Subject: Re: [R] help
> 
> I apologies for asking this question;
> I run the codes but why all the prediction for pH in 21-25 month are so
> close?
>  station month          pH
>           1   21  8.275635958
>           2   21  8.275635962
>           3   21  8.275635963
>           4   21  8.275635963
>           5   21  8.275635963
>           6   21  8.275635963
> 
> 
> 
> On Tue, Jan 7, 2014 at 2:12 PM, javad bayat <j.bayat194 at gmail.com>
> wrote:
> 
> > Dear Pikal Petr;
> > thanks for code.
> > It was usefull.
> >
> >
> >
> > On Tue, Jan 7, 2014 at 11:30 AM, PIKAL Petr
> <petr.pikal at precheza.cz>wrote:
> >
> >>  Hi
> >>
> >>
> >>
> >> and what is wrong with e.g.
> >>
> >>
> >>
> >> fit  <- neuralnet(pH~station+month, data=yourdata)
> >>
> >>
> >>
> >> As I said I am not an expert in neural nets  but here is some
> >> explanation how it works
> >>
> >> http://gekkoquant.com/2012/05/26/neural-networks-with-r-simple-
> exampl
> >> e/
> >>
> >>
> >>
> >> based on that after fitting you could do
> >>
> >>
> >>
> >> compute(fit, testdata)
> >>
> >>
> >>
> >> where testdata shall be station and month.
> >>
> >>
> >>
> >> However for time series it can be more appropriate something like
> >> ARIMA modelling.
> >>
> >>
> >>
> >> Petr
> >>
> >>
> >>
> >> *From:* javad bayat [mailto:j.bayat194 at gmail.com]
> >> *Sent:* Monday, January 06, 2014 5:58 PM
> >> *To:* PIKAL Petr
> >> *Subject:* Re: [R] help
> >>
> >>
> >>
> >> Dear Petr;
> >>
> >> I want to write function that: for example for pH:
> >>
> >> according these 20 months predict the variability of pH for next
> >> month and stations.
> >>
> >> all best.
> >>
> >>
> >>
> >> On Mon, Jan 6, 2014 at 7:23 PM, PIKAL Petr <petr.pikal at precheza.cz>
> >> wrote:
> >>
> >> Hi
> >> can you be more specific? In what aspect those packages does not
> >> comply with your data? What did you do for testing it?
> >>
> >> I am not an expert in neural networks but I do not see anything
> which
> >> prevents using your data in nnet.
> >>
> >>
> >> Petr
> >>
> >>
> >> > -----Original Message-----
> >> > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> >> > project.org] On Behalf Of javad bayat
> >>
> >> > Sent: Monday, January 06, 2014 3:16 PM
> >> > To: R-help at r-project.org
> >> > Subject: Re: [R] help
> >> >
> >>
> >> > Dear Petr;
> >>
> >> > I saw the nnet and neuralnet packag, and I cant find some thing
> >> > relating with my data based on neural network.
> >> >
> >> >
> >> > On Mon, Jan 6, 2014 at 10:55 AM, PIKAL Petr
> >> > <petr.pikal at precheza.cz>
> >> > wrote:
> >> >
> >> > > Hi
> >> > >
> >> > > Why you did not use dput for sending data? It is far better than
> >> > > picture, which can not be used without retyping.
> >> > >
> >> > > Redarding neural network, did you try e.g. nnet or neuralnet
> package.
> >> > >
> >> > > Petr
> >> > >
> >> > > > -----Original Message-----
> >> > > > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> >> > > > project.org] On Behalf Of javad bayat
> >> > > > Sent: Monday, January 06, 2014 7:37 AM
> >> > > > To: R-help at r-project.org
> >> > > > Subject: Re: [R] help
> >> > > >
> >> > > > Dear all;
> >> > > > many thanks for your answers.
> >> > > > Hear is my data (not all row: the station was 8 station at 20
> >> > month)
> >> > > > which I forward it as image. I hope some one can help me to do
> >> > > > Neural network for prediction of next month.
> >> > > > many thanks.
> >> > > > all bests.
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > > >
> >> > > > --
> >> > > > Best Regards
> >> > > > Javad Bayat
> >> > > > M.Sc. Environment Engineering
> >> > > > Shahid Beheshti (National) University (SBU) Alternative Mail:
> >> > > > bayat194 at yahoo.com
> >> > >
> >> >
> >> >
> >> >
> >> > --
> >> > Best Regards
> >> > Javad Bayat
> >> > M.Sc. Environment Engineering
> >> > Shahid Beheshti (National) University (SBU) Alternative Mail:
> >> > bayat194 at yahoo.com
> >> >
> >>
> >> >       [[alternative HTML version deleted]]
> >>
> >> >
> >> > ______________________________________________
> >> > R-help at r-project.org mailing list
> >> > https://stat.ethz.ch/mailman/listinfo/r-help
> >> > PLEASE do read the posting guide http://www.R-project.org/posting-
> >> > guide.html and provide commented, minimal, self-contained,
> >> > reproducible code.
> >>
> >>
> >>
> >>
> >>
> >> --
> >>
> >> Best Regards
> >> Javad Bayat
> >> M.Sc. Environment Engineering
> >> Shahid Beheshti (National) University (SBU) Alternative Mail:
> >> bayat194 at yahoo.com
> >>
> >
> >
> >
> > --
> > Best Regards
> > Javad Bayat
> > M.Sc. Environment Engineering
> > Shahid Beheshti (National) University (SBU) Alternative Mail:
> > bayat194 at yahoo.com
> >
> 
> 
> 
> --
> Best Regards
> Javad Bayat
> M.Sc. Environment Engineering
> Shahid Beheshti (National) University (SBU) Alternative Mail:
> bayat194 at yahoo.com
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.