Thanks a lot Paul!!
Best, Joel > Date: Thu, 28 Jan 2010 10:48:37 +0100 > From: p.hiems...@geo.uu.nl > To: joel_furstenberg_h...@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]]
______________________________________________ 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.