[R] Represent column in a loop

[hrishi]

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.

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