
Thanks a lot Paul!!

 

Best,

 

Joel
 
> Date: Thu, 28 Jan 2010 10:48:37 +0100
> From: p.hiemstra@geo.uu.nl
> To: joel_furstenberg_hagg@hotmail.com
> CC: r-help@r-project.org
> Subject: Re: [R] NA Replacement by lowest value?
> 
> Joel Fürstenberg-Hägg wrote:
> > Hi all,
> >
> > 
> >
> > I need to replace missing values in a matrix by 10 % of the lowest available value in the matrix. I've got a function I've used earlier to replace negative values by the lowest value, in a data frame, but I'm not sure how to modify it...
> >
> > 
> >
> > nonNeg = as.data.frame(apply(orig.df, 2, function(col) # Change negative values to a small value, close to zero
> > {
> > min.val = min(col[col > 0])
> > 
> 
> > col[col < 0] = (min.val / 10)
> > col # Column index
> > }))
> >
> > 
> >
> > I think this is how to start, but the NA replacement part doesn't work...
> >
> > 
> >
> > newMatrix = as.matrix(apply(oldMatrix, 2, function(col)
> >
> > {
> >
> > min.val = min(mData, na.rm = T) # Find the smallest value in the dataset
> >
> > col[col == NA] = (min.val / 10) # Doesn't work...
> > 
> use is.na(col) t find the NA's.
> 
> cheers,
> Paul
> > col # Column index
> >
> > }
> >
> > 
> >
> > Does any of you have any suggestions?
> >
> > 
> >
> > 
> >
> > Best regards,
> >
> > 
> >
> > Joel
> >
> > 
> > 
> > _________________________________________________________________
> > Hitta kärleken i vinter!
> > http://dejting.se.msn.com/channel/index.aspx?trackingid=1002952
> > [[alternative HTML version deleted]]
> >
> > 
> > ------------------------------------------------------------------------
> >
> > ______________________________________________
> > R-help@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.
> > 
> 
> 
> -- 
> Drs. Paul Hiemstra
> Department of Physical Geography
> Faculty of Geosciences
> University of Utrecht
> Heidelberglaan 2
> P.O. Box 80.115
> 3508 TC Utrecht
> Phone: +3130 274 3113 Mon-Tue
> Phone: +3130 253 5773 Wed-Fri
> http://intamap.geo.uu.nl/~paul
> 
 		 	   		  
_________________________________________________________________
Hitta hetaste singlarna på MSN Dejting!
http://dejting.se.msn.com/channel/index.aspx?trackingid=1002952
	[[alternative HTML version deleted]]

