Displaying 20 results from an estimated 4000 matches similar to: "incomplete final line found by readLines on ..."
2006 Jul 11
2
0* log(0) should be zero but NaN
Dear R-users
>prob <- c(0.5,0.4,0.3,0.1,0.0)
>cal <- prob * log(prob,base=2)
>cal
[1] -0.5000000 -0.5287712 -0.5210897 -0.3321928 NaN
Is there any way to change NaN to zero ?
I did come up with this by applying Ripley's relpy to my previous question
cal <-prob*log(pmax(prob,0.00000001),base=2)
Any suggestion ?
Thank you
Taka
2006 Nov 06
3
CPU or memory
Hi R users
Having both a faster CPU and more memory will boost computing power. I was
wondering if only adding more memory (1GB -> 2GB) will significantly reduce
R computation time?
Taka,
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2006 Feb 07
1
(second round) creating a certain type of matrix
Hi R users
Here is what I got with help from Petr Pikal (Thanks Petr Pikal). I modified
Petr Pikal's code to a little
to meet my purpose.
I created a function to generate a matrix
generate.matrix<-function(n.variable)
{
mat<-matrix(0,n.variable,(n.variable/2)/5+1) #matrix of zeroes
dd<-dim(mat) # actual dimensions
mat[1:(dd[1]/2),1]<-1 #put 1 in first half of first column
2006 Sep 19
2
looking for some functions to analyze a data set.
Hi R-users
I have a data set. There are 10 products and the numbers of people who
ranked the products.
The format of the data set is
productID rank1 rank2 rank3 rank4 rank5 rank6 rank7 rank8 rank9 rank10
-------------------------------------------------------------------------------------------------------
1 10
2 3
3 6
4 2
5
2006 Jun 27
3
looking for a more efficient R code.
Dear R-users
I have four simple linear models, which are all in the form of a*X+b
The estimated parameter vectors are
a <- c(1,2,3,4)
b <- c(4,3,2,1)
My goal is to draw a plot where x-axis is X (range from -100 to 100) and
y-axis is the sum of
all four linear models
X <- seq(-100,100, length=10000)
plot(X, sum of the four linear functions)
I started with a function for summing
2006 Aug 10
2
index.cond in xyplot
Dear R-users
I have 5 dependent variables (y1 to y5) and one independent variable (x) and
3 conditioning variables (m, n, and 0). Each of the conditioning variables
has 2 levels. I created 2*4 panel plots.
xyplot(y1+y2+y3+y4+y5 ~ x | m*n*o,layout = c(4,2))
I would like to reorder the 8 panels. I tried to use index.cond (e.g.,
index.cond = list(c(1,3,2,4,5,7,6,8)) but it didn't work out.
2006 Jul 10
2
problem in my code
Dear R-users
I wrote a small program for assigning a membership
Here is my script
sample.size <- 60
x <- rnorm(sample.size, 0, 1)
y <- rnorm(sample.size, 0, 1)
x.mean <- mean(x)
y.mean <- mean(y)
membership <- numeric(sample.size)
for (i in 1:sample.size)
{
if ((x[i] < x.mean) && (y[i] < y.mean))
{
membership[i]
2007 Jun 29
1
extracting df and MS values from aov
Dear R users,
I would like to extract df and Mean Sq values. I tried several things (e.g.,
str(model1), names(model1)) but I can't find a way to extract these values.
I also tried to search using
RSiteSearch. Any help will be appreciated. Thanks Taka,
model1<-aov(dv~iv.1*iv.2*iv.3)
summary(model1)
Df Sum Sq Mean Sq
iv.1 1 3.200 3.200
2006 Feb 07
1
creating a certain type of matrix
Hi R users
I like to generate a certain type of matrix.
If there are 10 variables, the matrix will have nrow=10, ncol=((10/2))/5+1.
so the resulting matrix's dimension 10 by 2. If there are 50 variables the
dimension of the resulting matrix will be 50 by 6.
The arrangement of elements of this matrix is important to me and I can't
figure out how to arrange elements.
If I have 20
2007 Jun 01
2
scan a directory and then make a string vector consisting of file names
Dear R-users,
I am looking for a way to scan a directory and then make a string vector
consisting of the file names in the directory.
For example, under c:\temp\
there are 4 files
a.txt, b.txt, c.txt, and d.txt
I would like to have a string vector
c("a.txt","b.txt","c.txt","d.txt")
How do I do that?
Thanks
Taka,
2006 Feb 05
2
generating strings in a tricky order
Hi R users
I like to generate some strings (a character vector) in a special way like
If i have 5 variables
"002.001",
"003.001", "003.002",
"004.001", "004.002", "004.003",
"005.001", "005.002", "005.003", "005.004"
so the created string vector's elements are
"002.001",
2006 Feb 18
2
figure out whether 1 is between two numbers
Hi R users
I have two variables (X and Y)
X <- rnorm(100,.7,.5)
Y <- rnorm (100,.3,.1)
I like to know whether 1 is between each pair of X and Y or not.
Thanks
TM
2006 Feb 05
3
reading in a tricky computer program output
Hi R user
I need to read in some values from a computer program output.
I can't change the output format because the developer of the program
doesn't allow to change the format of output.
There are two formats.
First one looks like this
if I have 10 variables,
------------------------------------------------------------------------------------------------------
[ 1]
2006 Sep 24
2
s language version and complie languages
Hi R users
Which version of S does the current R version use? Venables and Ripley's
book (2000) says R is version 3 of S language. Is there any change since
2000 ?
I searched R-help archive for using C or C++ with R. Although there are some
postings, I am looking for up-to-date answers. Which one ( C and C++) works
better with R? What complier is the best suited for R ( gcc or visual
2006 Feb 14
2
combine elements of a character vector into a character
Hi R users
I have a simple question to ask
x <- c("a","b","c")
x
[1] "a" "b" "c"
I like to have "abc" instead of having "a" "b" "c"
I tried to use paste and other functions related to character.
Is there any function (command) that enable me to combine elements of a
character vector into
2006 Feb 04
2
saving a character vector
Hi R users
I wrote a function that generates some character strings.
generate.index<-function(n.item){
for (i in 1:n.item)
{
for (j in ((i+1):n.item))
{
cat("i",formatC(i,digits=2,flag="0"),".",formatC(j,digits=2,flag="0"),"\n",sep="")
}
}
}
I
2007 Jul 30
3
Bind together two vectors of different length...
Dear everyone,
I've got difficulties in realizing the following
task:
I have two vectors:
A <- c(1:10)
B<- seq(1,10,2)
Now I want to make a table form vectors A and B as rows, and if a value of A
isn't present B, then I want to put a N/A symbol in it:
Output should look like this:
1 2 3 4 5 6 7 8 9 10
1 0 3 0 5 0 7 0 9 0
How can I do this in R?
Thank you.
--
Andris
2006 Jun 30
1
apply a function to several lists' components
Dear R-user
I have 100 lists.
Each list has several components.
For example,
>data1
$a
[1] 1 2
$b
[1] 3 4
$c
[1] 5
There are data1, data2,...., data100. All lists have the same number and the
same name of components.
Is there any function I can use for applying to only a specific component
across 100 lists?
(e.g., taking mean of $c acorss 100 lists) or do I need to write my own
2006 Jan 18
2
Display an Image on a Plane
Hi,
I am new to R and I would like to display an image on a plane in a 3D plot,
i.e. I would like to be able to specify a theta and a phi parameters like in
the function persp to display a 2D image on an inclined plane.
Regards,
vincent
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2006 Jan 18
2
Display an Image on a Plane
Hi,
I am new to R and I would like to display an image on a plane in a 3D plot,
i.e. I would like to be able to specify a theta and a phi parameters like in
the function persp to display a 2D image on an inclined plane.
Regards,
vincent
[[alternative HTML version deleted]]