search for: frmes

...1 i 1 i 1 c 2 i 2 c 2 c 2 i 2 i ... 10000 I would like ,for each level of cola and for x in colb: -if colb[x]=="i" and colb[x-1] does not exist (first row in dataframes), then replace colb[x] by "l" -if colb[x]=="i" and colb[x-1]=="c" (previous row in data frmes), then replace colb[x] by "l" -if colb[x]=="i" and colb[x-1]=="i" (previous row in data frmes), then replace colb[x] by "h" Thanks in advance Paul -- View this message in context: http://www.nabble.com/change-values-in-data-frames-tp18151205p18151205.html...