Hello frnds, I have a data file with following coloumns: Drug_A Drug_B P_value odds my question is i have to plot a qplot of drug_A vs Drug_b. considering the p_value and odds. The result should have all the drugs both A and B on axis but dots should be seen only if p_value if < 0.05 i actually dont know how to represent a coloumn in R. in a loop. I am sure this thing is easy but my programming skills are very bad. Thank you all. -- View this message in context: http://r.789695.n4.nabble.com/Represent-column-in-a-loop-tp3697679p3697679.html Sent from the R help mailing list archive at Nabble.com.