Displaying 20 results from an estimated 41 matches for "syrvn".
2011 Oct 13
8
Remove specific rows in a matrix/data.frame
...rs are also identical then I want to
remove either the first or the
second row of that letter. If for a letter the numbers are 1 and 0 I want to
remove the row with the 0.
That means if the code works I would and up with the following
matrix/data.frame
Letter Number
a 1
b 1
c 1
d 1
Many thanks,
Syrvn
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2011 Oct 06
3
Duplicate elements of a vector
Hi,
let's assume I have the following vector a:
1 5 23
How can I use R to duplicate the elements so that my new vector looks like:
1 1 5 5 23 23
Many thanks,
Syrvn
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2010 Sep 03
5
how to get row name of matrix when result is a vector
...3
b 5 34 5 2 4
> a[which(a[,3] < 6), ]
[1] 5 34 5 2 4
I actually thought it must be rather easy to somehow extract the row name
when the result is just a vector as in the second example and not a matrix.
I tried several ways but without any success.
Any advice?
Best,
syrvn
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2011 Oct 13
3
Create order of numbers based on a given vector
...FALSE)
I can I create the following order of numbers based on vector vec:
1, 2, 2, 3, 3, 3, 4, 5
Whenever there is a FALSE I increase the number (starting with 1).
Whenever there is a TRUE I set the same number as the previous FALSE has
been assigned to.
I would be happy for any input
Cheers,
Syrvn
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2011 Aug 23
3
R system command does not work with objects/variables
...ain it
does not run and I don't know how to overcome that issue.
p1 <- "../path1"
p2 <- "../path2"
p3 <- "../path3"
system("perl p1 p2 p3")
I also tried:
system("perl 'p1' 'p2' 'p3'")
Can anyone help?
Best,
syrvn
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2012 Jul 08
3
list.files() find files beginning with a .
...RUE, all.files = TRUE)
files
/XXX/ZZZ/.R_history
/XXX/ZZZ/AAA/Script.r
/XXX/ZZZ/BBB/test.xlsx
/XXX/ZZZ/CCC/.xyz
files <- files[grep("^.*$", files)]
I want grep to return only the following to lines:
/XXX/ZZZ/.R_history
/XXX/ZZZ/CCC/.xyz
Any ideas on how to solve that issue?
Cheers
syrvn
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2011 Nov 15
2
Extract pattern from string
Hello,
with Sys.time() you get the following string:
"2011-11-15 16:25:55 GMT"
How can I extract the following substrings:
year <- 2011
month <- 11
day_time <- 15_16_25_55
Cheers,
Syrvn
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2011 Oct 04
1
texi2dvi problem when compiling incorrect Latex code
...or
the process of texi2pdf / texi2dvi is not finished as the programme waits
for user input (mostly just press "enter" key). The problem is that R
outputs the output only after the whole programme finished so I always end
up having to kill my R console.
Is there any workaround for that?
Syrvn
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2011 Nov 19
1
Eclipse StatET - create own code formatting
Hello,
does anybody know whether it is possible to create its own code formatting
rules?
Defining rules under Eclipse -> Preferences -> R Code Formatting is so
limited.
Cheers,
Syrvn
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2011 Nov 26
1
dir.create() does not create directory
...ory is not
been created. The strange thing is that it happens only to some
sub-folders... On the other hand when I use the normal windows explorer in
one of these sub-folders and create a folder it works.
Any ideas? I also tried the mode="777" option but still the same problem
Cheers,
syrvn
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2010 Aug 10
2
p-values with pvclust
...s changing and not significant any longer (84).
I was wondering why this happens because I thought that for each brunch the
p-value is calculated independently?
Does anybody know how to get a correct p-value for the first brunch (7 and
8) maybe without adding an additional brunch?
Best regards
syrvn
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2011 Sep 29
1
simplest pgfSweave example results in error
...here:
http://www.text-upload.com/read.php?id=147997&c=7898288 test.tex
I have no clue at all why it doesn't work. For sweating I use the Sweave.sty
which comes with R.
Do I have to use a different file for pgfSweave?
Help is very much appreciated as I totally run out of ideas...
Best,
syrvn
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2010 Jan 29
2
Vectors with equal sd but different slope
...and x1 must have
the same sd. y and y1 should also exhibit the same sd's but different ones
as x and x1. Plotting x,y and x1,y1 should produce a plot with 2 vectors
having a different slope. Plotting both vector pairs in one plot with fixed
axes should reveal the different slope.
many thanks
syrvn
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2011 Oct 16
3
Which function to use: grep, replace, substr etc.?
...what_is_your_surname_peter"
I would like to apply predefined abbreviations for peter=p and name=n to
both strings
so that the new strings look like the followings:
str1: "My_n_is_p"
str2: "what_is_your_surn_p"
Which method is the best to use for that particular problem?
syrvn
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2010 Nov 29
2
Significance of the difference between two correlation coefficients
...difference for z values
is mathematically defined but I do not know how to incorporate the sample
size.
I found a couple of websites that provide that service but since I have huge
data sets I need to automate this procedure.
(http://faculty.vassar.edu/lowry/rdiff.html)
Can anyone help?
Cheers,
syrvn
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2011 Jul 13
7
Error when writing to Excel files using the packages xlsx and xlsx2
Dear group,
I am working on a rather big project where the output data frames have
dimensions of 3000 x 15 or greater. We are using xlsx and xlsx2 to write the
data.frames to Excel sheets.
Since recently we get the following error, when trying to write the data
frames to the excel sheets:
Error in ls(envir = envir, all.names = private) :
invalid 'envir' argument
We figured out that
2012 Mar 01
5
select rows by criteria
Hello,
I am stuck with selecting the right rows from a data frame. I think the
problem is rather how to select them
then how to implement the R code.
Consider the following data frame:
df <- data.frame(ID = c(1,2,3,4,5,6,7,8,9,10), value =
c(34,12,23,25,34,42,48,29,30,27))
What I want to achieve is to select 7 rows (values) so that the mean value
of those rows are closest
to the value of 35
2010 Jun 28
2
How to run Bibtex with pdfLatex in StatEt/MikTex on Windows ?
Hello,
I'm running R2.10, Eclipse, StatEt and MikTex 2.8 to create Sweave
documents, and everything seems to work great, until today...
I was trying to add citations from a Bibtex file, but I just got [?]
citations. However, if I open the .tex file that StatEt created in
MikTex and run the latex+bibtex+pdflatex command, the citations are present.
Does anyone know how to either configure
2012 Feb 11
2
Detect numerical series
Hello,
I am struggling with detecting successive digits in a numerical series
vector.
Here is an example:
vec <- c(1, 15, 26, 29, 30, 31, 37, 40, 41)
I want to be able to detect 29, 30, 31 and 40, 41.
Then, I would like to delete the successive digits from the vector.
1, 15, 26, 29, 37, 40
Cheers
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2012 Feb 23
2
extract subset of data.frame
Hello,
consider the following data.frame df and vector v
df <- data.frame(group = c("A","B","C","D"), value = c(1,2,3,4))
v <- c(2,3)
How can I return a sub data.frame which has only the rows left where value
matches v
df:
group value
B 2
C 3
Cheers
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