Dear all, I would like to estimate the correlation between concentration and biological response, but the correlation is not linear as concentration increases gradually along time with 3 peaks of concentration and response increases as well but less quickly and with three decreasing peaks corresponding to the concentration peaks as shown on the figure: http://n4.nabble.com/file/n2216510/example.jpg Does it exist a package in R to do so ?? Which kind of correlation could I use ?? I know this question is a bit in between statistics and R but I really wanted to know if such correlations are implemented in R. Thanks a lot for your help, ChloƩ -- View this message in context: http://r.789695.n4.nabble.com/correlation-pulses-of-concentration-and-biological-responses-tp2216510p2216510.html Sent from the R help mailing list archive at Nabble.com.
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