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mela
2005 Nov 13
1
selection of missing data
...tasis. If there is a metatsasis there is
the symbol "_". i want to exclude the row without metastasis wich
represent the NA data.
so, i wrote this
mela is the data fram
mela1=ifelse(mela[,c(11:12,14:21,23,24)]=="_",1,0) # selection of the
colomn of metastasis localisation
mela4=subset(mela3,Skin ==0 & s.c == 0 & Mucosa ==0 & Soft.ti ==0 &
Ln.peri==0 & Ln.med==0 & Ln.abdo==0 & Lung==0 & Liver==0 &
Other.Visc==0 & Bone==0 & Marrow==0 & Brain==0 & Other==0) ## selection
of the row with no metastasis localisation
nrow(mel...