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day1_exercise3

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day1_exercise3 [2017/12/13 18:12] (current)
hyjeong created
Line 1: Line 1:
 +  #1
 +  dat=read.csv(file='​Ex_data.csv',​stringsAsFactors=F)
 +  #2
 +  head(dat)
 +  #3
 +  dim(dat)
 +  #4
 +  write.table(dat[,​1],​file='​gene_name.txt',​quote=F,​sep=''​)
 +  #5
 +  x=dat[,​2:​10]
 +  head(x)
 +  write.table(x,​file='​sub_data.txt',​quote = F,sep = '​\t'​)
 +  #6
 +  y=dat[nchar(dat[,​1])>​7,​]
 +  dim(y)
 +  write.table(y,​file='​sub_data2.csv',​sep=','​)
 +  #7
 +  sum(is.na(dat))
 +  #8
 +  which(is.na(dat))
 +  #9
 +  which(is.na(dat),​arr.ind = T)
 +  #10
 +  index=which(is.na(dat),​T)
 +  dat[index]=10
 +  sum(is.na(dat))
 +  dat[index]
  
day1_exercise3.txt ยท Last modified: 2017/12/13 18:12 by hyjeong