Displaying 20 results from an estimated 10000 matches similar to: "another histogram question"
2004 Aug 19
3
probability histogram question
Hello, all;
I get an unexpected result when trying to plot a probability histogram
with R1.9.1 on windows xp:
#with the following code:
> x <- runif(100,0,1)
> hist(x)
> hist(x, freq=F)
> h <- hist(x, freq=F)
> summary(h)
# Length Class Mode
#breaks 11 -none- numeric
#counts 10 -none- numeric
#intensities 10 -none- numeric
#density 10
2007 Aug 15
4
Possible to "import" histograms in R?
Hi,
I have a large amount of data that I would like to create a histogram of and
plot and do things with in R. It is pretty much impossible to read the data
into R, so I have written a program to bin the data and now have a list of
counts in each bin. Is it possible to somehow import this into R and use
hist(), so I can, for instance, plot the probability density? I have looked
at the help page
2008 Nov 15
1
Rename objects based on list
Hi all,
I am trying to find a way to rename R objects with names pulled from a
vector of names. For example, I have a data frame, my.data.frame, and
a list of names, my.names. My.names is simply the column names of
my.data.frame.
I want save the histogram with the column name as the name of the object.
for (i in 1:ncol(my.data.frame) {
tmp<-hist(my.data.frame[,i])
2006 Aug 25
1
How to get back POSIXct format after calculating with hist() results
Hi,
I have a casting/formatting question on hist.POSIXt:
The histogram plot from POSIXct works perfect (with help of Prof. Ripley
-thanks!).
When processing the hist(plot=FALSE) output and then plotting the
results over the x-axis (bins) coming from hist(), I lose the date/time
labels, getting instead integers displayed.
Trying to cast the $breaks with as.POSIXct gives silly results with
2011 Dec 31
1
Histogram omitting/collapsing groups
I have two large datasets (156K and 2.06M records). Each row has the
hour that an event happened, represented by an integer from 0 to 23.
R's histogram is combining some data.
Here's the command I ran to get the histogram:
> histinfo <- hist(crashes$hour, right=FALSE)
Here's histinfo:
> histinfo
$breaks
?[1] ?0 ?1 ?2 ?3 ?4 ?5 ?6 ?7 ?8 ?9 10 11 12 13 14 15 16 17 18 19 20 21
2009 Jul 26
2
problems hist() and density
Hello,
I have a problem with the hist() function and showing densities. The
densities sum to 50 and not to 1! I use R version 2.9.1 (2009-06-26) and
I load the seqinR library.
My data is the following vector:
[1] 0.1400000 0.2000000 0.2200000 0.2828283 0.1600000 0.1600000
0.3600000
[8] 0.1600000 0.2200000 0.2600000 0.2000000 0.3000000 0.2200000
0.2342342
[15] 0.1800000 0.2200000 0.1600000
2012 Feb 06
2
histogram
With R and the hist function, is there a way to make a histogram in which
the y axis denotes propotion with respect to a separate sample dataset of
the same range instead of frequency?
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2011 Oct 24
3
Creating a histogram properly
Hello all,
I'm trying to make a histogram of the data contained in my dataframe.
The summary of the data gives me exactly what I want
summary (Data)
V1 V2
first001: 3 last001: 9
first002: 3 last002: 7
first003: 2 last003: 6
(Other) :52 (Other): 27
But how do I capture the names and values in vectors so I can plot them?
2006 Apr 05
1
hist function: freq=FALSE for standardised histograms
Dear All,
I am a undergraduate using R for the first time. It seems like an excellent
program and one that I look forward to using a lot over the next few years,
but I have hit a very basic problem that I can't solve.
I want to produce a standardised histogram, i.e. one where the area under
the graph is equal to 1. I look at the manual for the histogram function and
find this:
freq:
2010 Mar 30
4
list index rules evaluation behavior
I have what may be a simple/foolish question, but I've done the due diligence
and looked through pages of posts here as well as several of the PDFs on the
CRAN site, but haven't been able find what I'm after.
I am working with a list of say 3 histogram objects A, B & C, and each
histogram is a list of 7 elements. I would like to access $name, the 6th
element, of histograms A,B and
2009 Jun 01
1
Bug in hist() when working with Dates ?
Hi,
It seems that hist() has a buggy behavior when breaking over "days".
The bug can be reproduced in a few steps:
> d=data.frame(date=c("2009-01-01", "2009-01-02", "2009-01-02"))
> d$date=as.Date(d$date)
> d$date
[1] "2009-01-01" "2009-01-02" "2009-01-02"
> h=hist(d$date, "days")
> h$count
[1] 3
2008 Jan 11
1
Histogram from frequency table?
Hi, I've had some trouble figuring out how to produce a histogram in R directly given a frequency table or relative frequency table. I've looked through the documentation and mailing list, and have only found information on producing histograms given the original data set. Any help would be appreciated!
An example of what I'd like to do would be to take the following frequency table:
2006 Nov 30
1
scaling y-axis to relative frequency in multiple histogram (multhist)
Hi,
I'm plotting a multiple histogram using the function multhist {package
plotrix}, something like:
library(plotrix)
mh <- list(rnorm(200, mean=200, sd=50), rnorm(200, mean=250, sd=50))
multhist(mh)
In this graph y-axis represents the frequency of observations.... but I
would like it to be scaled into relative frequencies,
does anybody know how to do this with multhist or similar
2008 Feb 16
3
how to specify the location of tick mark on x axies
Dear:
I want to plot barplot and let bar be in the middle of each x axis category.
Do you have this experience?
Many Thanks!
Xin
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2010 Apr 23
1
help in conditional histogram
Dear Dr. Sarkar,
When I try to run the codes, I found the following problem:
> h<- sample(1:14, 319, rep=T)
> c<- sample(1:14, 608, rep=T)
> n<- sample(1:14, 1140, rep=T)
> vt<-c(h, c, n)
> ta<-rep(c("h", "c", "n"), c(319, 608, 1140))
>
> to<-data.frame(vt,ta)
> library(lattice)
Attaching package: 'lattice'
2004 Nov 26
2
hist and truehist
Hello!
Up to now I have been using hist() to display the distributions.
Howevere, I noteiced strange numbers on y (vertical) axis, if I used
probability = T or freq = F option. I thought it is a bug and launched
the R-bug system and found some posts on that matter. Brian Ripley
responded to one, that one should look at truehist() for that. Ok I can
use truehist() if I want to see the ratios
2008 Jan 16
2
Own classes in "histogram"
Hi,
I try to make a histogram from a variable that contains the number of
shoots from about 1000 individuals from a specific plant species (the range is 1-110).
Those numbers are highly skewed to the right.
My question is: how can I make my own classes with the lattice
"histogram"?
I tried it with "breaks=c(0,5,10,15,20,25,110)" but my "25-110"-class is presented
2007 Aug 05
1
Any "special interest" in R/pic interface?
Hi Folks,
I'm wondering if there are people out there who would
be interested in what would be involved in developing
an interface between R graphics and the 'pic' language.
Explanation; 'pic' has been part of the Unix 'troff'
typesetting suite since very early days (1970s), and also
of the GNU troff: 'groff'. Its function is to act as a
preprocessor,
2011 Jan 27
3
Warning with mle
Hi there,
I'm pretty new to the field of fitting (anything). I try to fit a
distribution with mle, because my real data seems to follow a
zero-inflated poisson distribution. So far, I tried a simple example
to see whether I understand how to do it or not:
# example count data
x <- 0:10
y <- dpois(x, lambda = 1.4)
# zero-inflated poisson
zip <- function(x, lambda, prop) {
(1 -
2007 Dec 30
1
Histogram with different colors for different portions
Dear Rusers,
I would like to color different sections of a histogram different colors.
I have an example that was done by "brute force" given below. Has anyone
implemented something like this in general? If not, any suggestions/pointers
on how to write a general function to do so would be most appreciated.
Alan-