
> >> It sounds like something is going wrong with the melting. Could you
> >> please include the output of str(original data frame), and
> >> str(melted)? (Or even better a small version of your data created
> >> with dput)
> >
> 
> > And this is a str output of the original data frame (first few rows of that
> > displayed in the console):
> >
> > `data.frame':   6 obs. of  720 variables:
> >  $ -179.75: num  -99.9 -99.9 -99.9 -99.9 -99.9 -99.9
> >  $ -179.25: num  -99.9 -99.9 -99.9 -99.9 -99.9 -99.9
> >  $ -178.75: num  -99.9 -99.9 -99.9 -99.9 -99.9 -99.9
> >  $ -178.25: num  -99.9 -99.9 -99.9 -99.9 -99.9 -99.9
> >  $ -177.75: num  -99.9 -99.9 -99.9 -99.9 -99.9 -99.9
> >
> 
> Oooh, sorry, I thought your original was a matrix.  So you should do:
> 
> melted <- melt(as.matrix(yourdataframe))


I've just tried this and unfortunately it only produces a list of the latitude (column name) values from -89.75 to 89.75, without any of the other data:

> dim(melted)
[1] 360   0
> str(melted)
 num[1:360, 0 ] 
 - attr(*, "dimnames")=List of 2
  ..$ : chr [1:360] "-89.75" "-89.25" "-88.75" "-88.25" ...
  ..$ : NULL


Is there a  way of retrieving the other data?


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