This is a drawing problem rading the use of histogram function since you dont have original data.
Then just use the rect function. e.g with you data

yrbreak<-c(0, 1, 2, 3, 3.5, 4.5, 5, 5.5, 6)
yrsurfa<-c (0, 0.2, 0.3, 0.3, 0.1, 0, 0.1, 0)

plot(yrbreak,yrsurfa,col="white",xaxt="n",xlim=c(0,7),ylim=c(0,1),ylab="")
axis(1,yrbreak,paste(yrbreak))

rect(1, 0, 2, 0.2, col = "grey");                                             # The first
rect(2, 0, 3, 0.3, col = "grey");                                             #The second
rect(3, 0, 3.5,0.6, col = "grey"); # ...
rect(3.5, 0, 4.5, 0.1, col = "grey");
rect(5, 0, 5.5, 0.2, col = "grey");

 


Justin BEM
BP 1917 Yaoundé
Tél (237) 99597295
    (237) 22040246

----- Message d'origine ----
De : squall44 <tobias.minder@bluewin.ch>
À : r-help@stat.math.ethz.ch
Envoyé le : Vendredi, 31 Août 2007, 10h15mn 55s
Objet : [R] Histogram


Hello,

Although I've done lots of research on histograms, I'm still not able to
create one. I'd be glad if someone could explain them to me.

That's what it eventually should look like:
http://www.nabble.com/file/p12423193/histogram.gif 

The interval limits are: (0), 1, 2, 3, 3.5, 4.5, 5, 5.5, (6)
The interval widths are therefore: (1), 1, 1, 0.5, 1, 0.5, 0.5, (0.5)
The surface areas are: (0), 0.2, 0.3, 0.3, 0.1, 0, 0.1, (0)

I think the argument for the interval limits is breaks, isn't it? How can I
define the interval widths?

Thanks for any clues
Tobias
-- 
View this message in context: http://www.nabble.com/Histogram-tf4359093.html#a12423193
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