Displaying 20 results from an estimated 10000 matches similar to: "extraction of element"
2010 Oct 29
2
plot pdf
I want to plot the unstadardized version of a normal plot. Can you explain why that is not working?
Dev.set(1)
xcrit=-1.645
cord.x <- c(-3,seq(-3,xcrit,0.01),xcrit)
cord.y <- c(0,dnorm(seq(-3,xcrit,0.01)),0) # what does final 0 do here?
curve(dnorm(x,0,1),xlim=c(-3,3),main='Normal PDF')
polygon(cord.x,cord.y,col='orange')
2009 Jul 25
4
graphs
Hello,
I am plotting two distributions and want to draw a vertical line at the
critical point 149.
How can I stop it from going further up than the norm(140,15) curve?
x<-seq(75,225,0.1)
plot(x,dnorm(x,mean=140, sd=15), type='l', col='navy')
abline(v = 149, col = "black")
curve(dnorm(x,mean=150, sd=15),from=75, to=225, col='orange', add=TRUE)
Thank you.
2009 Jul 28
2
formatting in r
Hello,
I have output that I want to print out. I am having a few issues.
1] output u to power is really nothing more than a 2 x 11 set of values
formed using cbind function
and printed out as a data frame
How can I get it to output over several lines such as seen here?
2] Critical Z etc. were added by hand. I need an example of how I can
mix alphanumeric
and numeric data on
2009 Jul 23
2
mathematical notation in R
Does this approach what you're looking for?
See
?is.finite
for more info
> LBAuo<- -9999
> LBAuo
[1] -9999
> if (LBAuo <= -9999) LBAuo <- -Inf
> LBAuo
[1] -Inf
>
HTH
Steven McKinney
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Mary A. Marion
> Sent: Wednesday, July 22, 2009
2010 Nov 01
1
combining plots (curve + Plot functions)
Hello,
?
What I really want to do is to add a rejection region in the
form of a long rectangle to a density plot I have drawn.?
I am getting? 2 plots.?
How can I add rectangle to first plot?? see code below.
First section works fine.? It just is not quite what I want.
# NORMAL DISTRIBUTION PLOT OF RAW DATA WITH UPPER CRITICAL LEVEL - ok
xcrit=144.1
# *** single-sample Upper one-tailed
2009 Jul 09
2
naming of columns in R dataframe consisting of mixed data (alphanumeric and numeric)
Hello,
I have an r function that creates the following dataframe tresults2.
Notice that column 1 does not have a column heading.
Tresults2:
[,1]
estparam 18.00000
nullval 20.00000
. . .
ciWidth 2.04622
HalfInterval 1.02311
pertinent code:
results<-cbind( estparam, nullval, t, pv_left, pv_right, pv_two_t,
estse, df, cc, tbox, llim, ulim, ciWidth,
2009 Jul 10
2
IF STATEMENTS
Hello,
I am working on using if statements. What is the error message telling
me here and how do I correct for it?
I have tried various combinations of quotes.
Thank you.
Sincerely,
Mary A. Marion
#Find critical values
crit<-function(n,alpha,type)
{
if (type==twoSided)
{
alpha2=alpha/2
tL<-qt(alpha2,n-1)
tU<-qt(1-alpha2,n-1)
}
if (type==Lower)
{
tL<- -9999
2012 Jul 03
3
design matrix creation in R
Hello,
I want to create a design matrix using R. Can you explain the code which creates the following please? I understand the first part.
b=g1(?) does what?
dd <- data.frame(a = gl(3,4), b = gl(4,1,12)) # balanced 2-way
dd
a b
1 1 1
2 1 2
3 1 3
4 1 4
5 2 1
6 2 2
7 2 3
8 2 4
9 3 1
10 3 2
11 3 3
12 3 4
I am using the tree dataset in R. I want to form a reparameterized design
2011 Nov 01
2
drawing ellipses in R
Hello,
I have been following the thread dated Monday, October 9, 2006 when Kamila Naxerova asked a question about plotting elliptical shapes. Can you explain the equations for X and Y. I believe they used the parametric form of x and y (x=r cos(theta), y=r sin(theta). I don't know what r is here ? Can you explain 1)the origin of these equations and 2) what is r?
Sincerely,
Mary A. Marion
2009 Mar 20
2
print of objects in R
Hello,
I have been watching my output as I create functions and do other things
in r.
One thing I don't like is the [1,] type notation at the beginning of a
line. I have been
able to change that to a number such as 1 2 etc. using
as.data.frame(object).
How can I stop the printing of a line number and column heading if I
want to?
I am thinking about publishing and writing of papers.
2004 Sep 16
3
Estimating parameters for a bimodal distribution
For several years, I have been using Splus to analyze an ongoing series of
datasets that have a bimodal distribution. I have used the following
functions, in particular the ms() function, to estimate the parameters: two
means, two standard deviations, and one proportion. Here is the code I've
been using in S:
btmp.bi <- function(vec, p, m1, m2, sd1, sd2)
{
2011 Nov 05
1
3-D ellipsoid equations
+
Hello,
The parametric equations of an ellipsoid can be written in terms of spherical coordinates. The three spherical coordinates are converted to Cartesian coordinates by
X=a cos (α) sin(θ)
Y=b sin(α) sin(θ)
Z=c cos(θ)
for α and θ
The parameter α varies from 0 to 2 π and θ varies from 0 to π . Here ( X o , Y o ,Z o ) is the center of the ellipsoid, and θ is the angle
2012 Jan 16
3
list: index of the element, that is TRUE
Dear People,
I have got the following example for a vector and the index of the TRUE
element:
Myvector <- c(FALSE,FALSE,FALSE,FALSE,FALSE,FALSE,FALSE,TRUE)
which(Myvector)
Now I would like to find out the same for a list:
Mylist <- list(FALSE,FALSE,FALSE,FALSE,FALSE,FALSE,FALSE,TRUE)
...
Does anyone know how to do this?
Thank you very much in advance,
Marion
[[alternative HTML
2010 Nov 10
1
par mfrow in "function" problem
Hi all,
I defined the following
#############################
myhist=function(x){
hist(x,xlab="",main="")
h=hist(x)
xfit=seq(min(x),max(x),length=100)
yfit=dnorm(xfit,mean(x),sd=sd(x))
yfit=yfit*diff(h$mids[1:2])*length(x)
lines(xfit, yfit, col="blue", lwd=2)
}
#############################
individually, it worked fine
however, if I used
par(mfrow=c(2,2))
2013 Jun 07
1
Folder permissions not working
I seem to be having a bit of a brain fade with regard to permissions in
samba. I have a share with several folders owned by different groups:
drwxrws--- 13 root accounts 4.0K Jun 7 12:12 Accounts
drwxrws--- 16 ian accounts 4.0K Jun 7 11:24 Administration
drwxrws--- 14 accounts users 4.0K Apr 22 12:05 Downloads
drwxrwsr-x 7 ian users 4.0K Mar 22 13:51
2011 Sep 19
2
pasting elements of one character vector together
hello,
i am familiar with the paste command with which i can paste for exaple:
object <- "Hello"
paste(object,"World")
now i would like to be able to paste all the elements of the same vector
together e.g:
object <- c("Hello","World")
getting as a result also:
"Hello World".
Does anyone know the solution to this problem?
Thank you
2011 Oct 11
2
binding all elements of list (character vectors) to a matrix as rows
dear r-users,
i have got a problem which i am trying to solve:
i have got the following commands:
Mymatrix <- matrix(1:9,ncol=3)
Z <-
list("V1"=c("a","",""),"V2"=c("b","",""),"V3"=c("c","",""),"V4"=c("d","",""))
Mymatrix <-
2012 May 05
3
download extremely slow
I have been trying to download the latest version to my Macbook X version
10.6.8 from my institutions mirror http://cran.cnr.Berkeley.edu
Usually is only takes minutes, but regardless of the browser or where I
connect to the internet I have been unable to download because it would
take upwards 2 days according to the download dialogue box.
I'd really like to get the newest version to run some
2013 Feb 23
1
Problem importing mail from maildir directory
Hi,
I am trying to import mail from a maildir directory into dovecot using the 'doveadm import' command:
-----------
bash-4.0$ doveadm -D import -u marion maildir:${HOME}/Mail '' ALL
doveadm(marion): Debug: Loading modules from directory: /usr/lib64/dovecot
doveadm(marion): Debug: Module loaded: /usr/lib64/dovecot/lib10_quota_plugin.so
doveadm(marion): Debug: Loading modules
2007 Oct 13
2
How to identify the two largest peaks in a trimodal distribution
Hello all
I'm trying to do a simulation that involves identifying the minimum
point between two peaks of a (usually) bimodal distribution. I can do
this easily if there are only two peaks:
CnBdens<-density(Ys/Xs) #probability density function for ratio of Ys
to Xs
for(p in 1:512) ifelse(CnBdens$y[p]>CnBdens$y[p-1],peak1<-p,break)
#identifies first peak in probability