[R] Histogram plot help

[David L Carlson]

Does it work the way you want if you add prob=TRUE to the second and third
hist() commands and run do.call() before abline()?

----------------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77843-4352

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of YAddo
> Sent: Monday, December 03, 2012 4:22 PM
> To: r-help at r-project.org
> Subject: [R] Histogram plot help
> 
> Dear All:
> 
> I plotted a histogram with Abline, clipping with color codes but i run
> into
> some problems.   The "abline' does not show up at all,  and when i
> request
> the 'prob=True' (to obtain the freqs), my clipped region colors the
> section
> of the graph instead of the plot only.
> 
> Is there any way i can get the y-axis figures  to be in whole numbers
> rather
> than decimals?
> 
> Many thanks for your help.
> YA
> 
> Here are the working codes i am tweaking.
> 
> Everything worked fine before i trying adding stuffs (prob=T, etc).
> 
> 
> x <- rnorm(1000)
> hist(x, xlim=c(-4,4),ylab="Prevalence",prob=T,lwd=3,las=1)
> lines(density(x),col="black",lwd=2)
> usr <- par("usr")
> clip(usr[1], -2, usr[3], usr[4])
> hist(x, col = 'red', add = TRUE)
> clip(2, usr[2], usr[3], usr[4])
> hist(x, col = 'blue', add = TRUE)
> abline(v=c(-1),lty=1,lwd=3,col="black")
> do.call("clip", as.list(usr))  # reset to plot region
> 
> 
> 
> 
> 
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