[R] Error Missing values where true/false needed

[PIKAL Petr]

Huh

and what is the result of e.g.

data$Rain[indicNAs[1]]

I bet that you will see

[1] NA

and your if question askes if (NA eqals 60) which results in NA and "if" is telling you that it expects TRUE or FALSE but not NA.

I do not see how much clearer the error message shall be.

Cheers
Petr

> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of
> Frederic Ntirenganya
> Sent: Wednesday, November 26, 2014 7:27 AM
> To: Michael Dewey
> Cc: r-help at r-project.org
> Subject: Re: [R] Error Missing values where true/false needed
>
> Hi PIKAL,
>
> The error seems to be starnge to me because i access the indices of
> NAs.
> Indices can't be non-applicable.
> This is the output of indecs having the NA in my dataset. my dataset is
> very big that's why I did not provide it.
>
> > indicNAs <- which(data$Rain %in% NA)
> > indicNAs
>  [1]   426   792  1158  1890  2256  2622  3354  3720  4086  4818  5184
> 5550  6282  6648  7014  7746  8112
> [18]  8478  9210  9576  9942 10674 11040 11406 12138 12504 12870 13602
> 13968 14334 15066 15432 15798 16530
> [35] 16896 17262 17994 18360 18726 19458 19824 20190
>
> Regards,
> Frederic.
>
> Frederic Ntirenganya
> Maseno University,
> African Maths Initiative,
> Kenya.
> Mobile:(+254)718492836
> Email: fredo at aims.ac.za
> https://sites.google.com/a/aims.ac.za/fredo/
>
> On Tue, Nov 25, 2014 at 3:51 PM, Michael Dewey
> <info at aghmed.fsnet.co.uk>
> wrote:
>
> > You do not tell us what you are trying to do but I think there is
> > something wrong in the logic of your thinking as on the one hand you
> > are selecting just precisely those elements of data$Rain which are NA
> > and then testing whether any of them equals 60.
> >
> >
> >
> > On 25/11/2014 12:19, Frederic Ntirenganya wrote:
> >
> >> Dear All,
> >>
> >> I am getting this error and don't know why it comes. can you please
> help ?
> >>
> >> Error in if (data$Rain[i_NA] == 60) { :
> >>    missing value where TRUE/FALSE needed
> >>
> >> The loop is :
> >>
> >> indicNAs <- which(data$Rain %in% NA)
> >>    ind_nonleap = c() # NAs due to non leap years
> >>    ind_nonrecord = c() # NAs due to non recording values
> >>    for (i_NA in indicNAs ){
> >>      if(data$Rain[i_NA] == 60){
> >>        ind_nonleap <- append(ind_nonleap,i_NA)
> >>      }
> >>      else {
> >>        ind_nonrecord<-append(ind_nonrecord,i_NA)
> >>      }
> >>     #cat(ind_nonrecord)
> >>     #cat( ind_nonleap)
> >>    }
> >>    ind_nonleap
> >>
> >> Regards,
> >> Frederic.
> >>
> >> Frederic Ntirenganya
> >> Maseno University,
> >> African Maths Initiative,
> >> Kenya.
> >> Mobile:(+254)718492836
> >> Email: fredo at aims.ac.za
> >> https://sites.google.com/a/aims.ac.za/fredo/
> >>
> >>         [[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.
> >>
> >>
> >> -----
> >> No virus found in this message.
> >> Checked by AVG - www.avg.com
> >> Version: 2015.0.5577 / Virus Database: 4223/8627 - Release Date:
> >> 11/25/14
> >>
> >>
> >>
> > --
> > Michael
> > http://www.dewey.myzen.co.uk
> >
>
>       [[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.

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