Re: [R] Histogram ploting
Mateusz == Mateusz £oskot [EMAIL PROTECTED]
on Sun, 18 Apr 2004 17:13:34 +0200 writes:
Mateusz Hi Christophe, On 4/18/2004 3:17 PM, Christophe
Mateusz Pallier wrote:
The 'hist' function works on the raw data. In your data
set example, you have already computed the number of data
points in each bin.
Mateusz Yes, you are right. I evidently misunderstood the
Mateusz hist function usage described in manuals.
What you really want is probably a barplot of N You could
display your data:
plot(Class,N,'h')
Mateusz Yes, that's right. Thank you very much.
well, I think you did have real histogram data,
and in teaching about graphics I do emphasize the difference
between a barplot {in R: plot of table(); space between bars}
and a histogram {continuous x; no space between bars}.
In this case, I'd rather construct an object of class
'histogram' and plot() it, i.e., call the plot.histogram method:
(mids - seq(12.5, 47.5, by = 5))
N - c(3,10, 12,8, 7,3, 4,2)
## Construct breaks from mids in general
## (here, simply br - seq(10,50,by=5) is easier)
dx - mean(diff(mids))
br - (mids[-1] + mids[-length(mids)])/2
(br - c(br[1] - dx, br, br[length(br)] + dx))
his - list(breaks=br, counts=N, mids = mids)
class(his) - histogram
plot(his, main = Histogram of my stuff)
Regards,
Martin
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Re: [R] Histogram ploting
Hello Mateusz, The 'hist' function works on the raw data. In your data set example, you have already computed the number of data points in each bin. What you really want is probably a barplot of N You could display your data: plot(Class,N,'h') Or names(N)-Class barplot(N) Christophe Pallier oskot wrote: Hi, It's my first post on this group. I've just started learning using R and I like it ;-) I have I think simple question. I'm trying to plot a histogram for my data set. My data set is defined as follows: ClassN 12.53 17.510 22.512 27.58 32.57 37.53 42.54 47.52 Class means middle of set of my ranges I define. N column stores number of measurements counted to particular class. And now I would like to plot a simple histogram presenting numbers of measurements in each class. As I read in manual, hist function takes x (my N) as the first param but I can not identify how should I pass my class ranged into hist function. I believe you can understand my problem ;-))) Could anyone help me ? Kind regards __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Histogram ploting
Hi Christophe, On 4/18/2004 3:17 PM, Christophe Pallier wrote: The 'hist' function works on the raw data. In your data set example, you have already computed the number of data points in each bin. Yes, you are right. I evidently misunderstood the hist function usage described in manuals. What you really want is probably a barplot of N You could display your data: plot(Class,N,'h') Yes, that's right. Thank you very much. Kind regards -- Mateusz oskot mateusz at loskot dot net __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
