Dear all, I attempted to transform my data using "asin" but a WARNING message appears: dat1$Abu.tr<-asin(sqrt(dat1$Abundance/100)) Warning message: In asin(sqrt(dat1$Abundance/100)) : NaNs produced What does it mean? Is it a problem? How can I solve this? Thank you! XAVIER
This is a math question, not an R question. You cannot give numbers to asin that
are less than -1 or greater than 1 and get a defined answer.
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On February 22, 2015 10:28:24 AM PST, CHIRIBOGA Xavier <xavier.chiriboga at
unine.ch> wrote:>Dear all,
>
>
>
>I attempted to transform my data using "asin" but a WARNING
message
>appears:
>
>
>
>dat1$Abu.tr<-asin(sqrt(dat1$Abundance/100))
>Warning message:
>In asin(sqrt(dat1$Abundance/100)) : NaNs produced
>
>
>
>What does it mean? Is it a problem? How can I solve this?
>
>
>
>Thank you!
>
>
>
>XAVIER
>
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CHIRIBOGA Xavier <xavier.chiriboga <at> unine.ch> writes:> > Dear all, > > I attempted to transform my data using "asin" but a WARNING message appears: > > dat1$Abu.tr<-asin(sqrt(dat1$Abundance/100)) > Warning message: > In asin(sqrt(dat1$Abundance/100)) : NaNs produced > > What does it mean? Is it a problem? How can I solve this? > > Thank you! > > XAVIERTo follow up on this, try printing dat1$Abundance[is.na(dat1$Abu.tr)] to see which values are causing the problem.
Le 22/02/2015 19:28, CHIRIBOGA Xavier a ?crit :> Dear all, > > > > I attempted to transform my data using "asin" but a WARNING message appears: > > > > dat1$Abu.tr<-asin(sqrt(dat1$Abundance/100)) > Warning message: > In asin(sqrt(dat1$Abundance/100)) : NaNs produced > > > > What does it mean? Is it a problem? How can I solve this? > > >One or more of your Abundance data is negative, higher than 100 or non-finite: > asin(seq(from=-2, to=2, by=0.1)) [1] NaN NaN NaN NaN NaN NaN NaN [8] NaN NaN NaN -1.5707963 -1.1197695 -0.9272952 -0.7753975 [15] -0.6435011 -0.5235988 -0.4115168 -0.3046927 -0.2013579 -0.1001674 0.0000000 [22] 0.1001674 0.2013579 0.3046927 0.4115168 0.5235988 0.6435011 0.7753975 [29] 0.9272952 1.1197695 1.5707963 NaN NaN NaN NaN [36] NaN NaN NaN NaN NaN NaN Message d'avis : In asin(seq(from = -2, to = 2, by = 0.1)) : production de NaN > sqrt(seq(from=-2, to=2, by=0.1)) [1] NaN NaN NaN NaN NaN NaN NaN NaN [9] NaN NaN NaN NaN NaN NaN NaN NaN [17] NaN NaN NaN NaN 0.0000000 0.3162278 0.4472136 0.5477226 [25] 0.6324555 0.7071068 0.7745967 0.8366600 0.8944272 0.9486833 1.0000000 1.0488088 [33] 1.0954451 1.1401754 1.1832160 1.2247449 1.2649111 1.3038405 1.3416408 1.3784049 [41] 1.4142136 Message d'avis : In sqrt(seq(from = -2, to = 2, by = 0.1)) : production de NaN But take a look at this also about arcsine transformation: Warton, D.I., Hui, F.K.C., 2011. The arcsine is asinine: the analysis of proportions in ecology. Ecology 92, 3-10. Sincerely, Marc
Le 22/02/2015 19:28, CHIRIBOGA Xavier a ?crit :> Dear all, > > > > I attempted to transform my data using "asin" but a WARNING message appears: > > > > dat1$Abu.tr<-asin(sqrt(dat1$Abundance/100)) > Warning message: > In asin(sqrt(dat1$Abundance/100)) : NaNs produced > > > > What does it mean? Is it a problem? How can I solve this? > > >One or more of your Abundance data is negative, higher than 100 or non-finite: > asin(seq(from=-2, to=2, by=0.1)) [1] NaN NaN NaN NaN NaN NaN NaN [8] NaN NaN NaN -1.5707963 -1.1197695 -0.9272952 -0.7753975 [15] -0.6435011 -0.5235988 -0.4115168 -0.3046927 -0.2013579 -0.1001674 0.0000000 [22] 0.1001674 0.2013579 0.3046927 0.4115168 0.5235988 0.6435011 0.7753975 [29] 0.9272952 1.1197695 1.5707963 NaN NaN NaN NaN [36] NaN NaN NaN NaN NaN NaN Message d'avis : In asin(seq(from = -2, to = 2, by = 0.1)) : production de NaN > sqrt(seq(from=-2, to=2, by=0.1)) [1] NaN NaN NaN NaN NaN NaN NaN NaN [9] NaN NaN NaN NaN NaN NaN NaN NaN [17] NaN NaN NaN NaN 0.0000000 0.3162278 0.4472136 0.5477226 [25] 0.6324555 0.7071068 0.7745967 0.8366600 0.8944272 0.9486833 1.0000000 1.0488088 [33] 1.0954451 1.1401754 1.1832160 1.2247449 1.2649111 1.3038405 1.3416408 1.3784049 [41] 1.4142136 Message d'avis : In sqrt(seq(from = -2, to = 2, by = 0.1)) : production de NaN But take a look at this also about arcsine transformation: Warton, D.I., Hui, F.K.C., 2011. The arcsine is asinine: the analysis of proportions in ecology. Ecology 92, 3-10. Sincerely, Marc