Hello,
I am trying to plot multiple histograms with the same scales, etc into one
plot. The commands below produce a 3 page PDF with each histogram occupying
the upper right quadrant. And use slightly different scales on the X and Y
axes.

> s21 <- dat[dat$sc_recov=="21",]
> s21.ED <- subset(s21, select=(bbED))
> s31 <- all[all$sc_recov=="31",]
> s31.ED <- subset(s31, select=(bbED))
> s41 <- all[all$sc_recov=="41",]
> s41.ED <- subset(s41, select=(bbED))
> pdf("234_1_ED.pdf")
> par(mfrow = c(2, 2), oma = c(0, 0, 2, 0))
> hist(s21.ED) + hist(s31.ED) + hist(s41.ED)
> dev.off()

Also, for example if I add something like col="x", or main="x" to the
hist(x, ...) nothing appears on the plot.  ?

Please advise,
Thank you kindly,
M Just

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