search for: cenreg

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2013 Apr 15
2
regression with paired left-censored data
...ed (i.e. has values below the detection limit). I have been using the NADA package of R to derive summary statistics and do some regression. I am now trying to carry out regression on paired data where both my X and Y have left-censored data within them. I have tried various commands in R: rega = cenreg(Cen(conc, cens_ind) ~ Gp_ident))? with all X and Y data stacked and using a group identifier to look at the differences this doesn't take account of the paired data though. I have also tried splitting the data and regessing one on the other rega = cenreg(Cen(conc1, censind1) ~ Cen(conc2,cens...