Dear Michael: Thank you very much for your help.
Now it it is clear, meanlog and sdlog in the rlnorm are the mean and standard deviation of the normal distribution. once again many thanks steve On Sun, Jul 12, 2015 at 11:15 PM, Michael Weylandt < [email protected]> wrote: > You can test this yourself quite easily: > > x <- rlnorm(1e6, meanlog=4) > mean(x) > mean(log(x)) > > Cheers, > Michael > > > On Jul 12, 2015, at 7:40 PM, Steven Stoline <[email protected]> wrote: > > > > Dear All: > > > > I need someone to clarify the value of the *meanlog* and *stlog* used in > > the function *rlnorm* when you sample from log-normal distribution. > > > > rlnorm(n, meanlog = 0, sdlog = 1) > > > > > > > > *For example: *y<- rlnorm(25, meanlog = 5, sdlog = 1) > > > > > > Is the value of the meanlog, *5*, the mean of the log-normal > distribution. > > Similarly, is the value of the *sdlog*, *1*, the standard deviation of > the > > log-normal distribution. > > > > or 5 and 1 are the mean and standard deviation of the normal distribution > > of x = log(y) ~N(mean =5, var = 1) > > > > with many thanks > > > > steve > > > > > > -- > > Steven M. Stoline > > 1123 Forest Avenue > > Portland, ME 04112 > > [email protected] > > > > [[alternative HTML version deleted]] > > > > _______________________________________________ > > [email protected] mailing list > > https://stat.ethz.ch/mailman/listinfo/r-sig-teaching > -- Steven M. Stoline 1123 Forest Avenue Portland, ME 04112 [email protected] [[alternative HTML version deleted]] _______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-teaching
