Displaying 20 results from an estimated 7000 matches similar to: "Searching 1st number within a ch. string"
2009 May 11
3
Searching within a ch. string
Hi all, is there any function to find some words in a character-string? For
example suppose the string is : "gdfsa-sdhchc-88", now I want to find
whether this string contains "sdhch". Is there any R function to do that?
Regards,
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2008 Dec 30
5
Downloading data from Economagic
I was trying to dw data from Economagic
[http://www.economagic.com/em-cgi/data.exe/libor/day-ussnon], using
following code :
library(fimport)
dat2 = economagicSeries("libor/day-ussnon", frequency = "daily")
Here I see that data is not complete, downloaded data starts from
"2007-12-31 ", whereas actual data is available from 2001.
secondly, how I convert that data
2008 Dec 02
3
How to solve following equation?
I need to solve a equation like this :
a = b/(1+x) + c/(1+x)^2 + d/(1+x)^3
where a,b,c,d are known constant. Is there any R-way to do that?
Thanks in advance
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2009 Jul 18
7
Question on qplot
Hi, suppose I have following codes :
library(zoo); library(ggplot2)
dat <- matrix(rnorm(500*2), 500); dat <- zooreg(dat, start =
as.Date("01/01/01", "%m/%d/%y"), frequency=1); plot(dat)
head(dat); month.no <- format(index(dat), "%m"); dat1 <-
cbind(coredata(dat), as.numeric(month.no))
x <- dat1[,1]; y <- dat1[,2]; z <- dat1[,3]
Now I draw a
2009 Jan 11
4
How to get solution of following polynomial?
Hi, I want find all roots for the following polynomial :
a <- c(-0.07, 0.17); b <- c(1, -4); cc <- matrix(c(0.24, 0.00, -0.08,
-0.31), 2); d <- matrix(c(0, 0, -0.13, -0.37), 2); e <- matrix(c(0.2, 0,
-0.06, -0.34), 2)
A1 <- diag(2) + a %*% t(b) + cc; A2 <- -cc + d; A3 <- -d + e; A4 <- -e
fn <- function(z)
{
y <- diag(2) - A1*z - A2*z^2 - A3*z^3 - A4*z^4
2008 Nov 05
2
How to extract following data
Hi everyone,
I have this kind of raw dataset :
- <Temp diffgr:id="Temp14" msdata:rowOrder="13">
<Date>2005-01-17T00:00:00+05:30</Date>
<SecurityID>10149</SecurityID>
<PriceClose>1288.40002</PriceClose>
</Temp>
- <Temp diffgr:id="Temp15" msdata:rowOrder="14">
2009 Nov 16
2
How to make all elements all elements lower-cap ?
I have a vector of letters like c("a", "B", "c"). Is there any R function to
force all elements to lower-cap ?
Thanks,
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2008 Nov 22
1
How to draw following plot in R?
I want to draw following plot, given here
http://www.2shared.com/file/4327128/830b82c4/pic.html
for the following data :
dat <- cbind(rnorm(100), sample(c(1:4), 1000, T))
colnames(dat) <- c("data","level")
Here x-axis should be on "data" and y-axis is for "level" and z-axis should
be to display the frequency of "data" for a particular
2005 Nov 03
3
Search within a file
Hi,
I am looking for a way to search a file for position of some expression,
from within R. My current code:
sha1Pos = gregexpr("<sha1>", readChar(filename,
file.info(filename)$size))[[1]]
Works fine for small files, but text files I will be working with might get
up to Gb range, so I was trying to accomplish the same without loading the
whole file into R.
I realize this is
2011 Sep 27
2
searching several subsequences in a single string sequence
Hi all
I am analyzing bird song element sequences. I would like to know how can I
get how many times a given subsequence is found in single string sequence.
For example:
If I have this single sequence:
ABCABAABABABCAB
I am looking for the subsequence "ABC". Want I need to get here is that the
subsequence is found twice.
Any idea how can I do this?
Thanks
how to count the total number of (INCLUDING overlapping) occurrences of a substring within a string?
2009 Dec 20
1
how to count the total number of (INCLUDING overlapping) occurrences of a substring within a string?
Last one for you guys:
The command:
length(gregexpr('cus','hocus pocus')[[1]])
[1] 2
returns the number of times the substring 'cus' appears in 'hocus pocus'
(which is two)
It's returning the number of **disjoint** matches. So:
length(gregexpr('aa','aaa')[[1]])
[1] 1
returns 1.
**What I want to do:**
I'm looking for a way to count
2008 Dec 16
6
Sorting a date vector
I have a date-like-vector like :
> date_file
"10-02-2008" "10-03-2008" "10-06-2008" "10-07-2008" "10-09-2008"
"10-10-2008" "10-13-2008" "10-14-2008" "10-15-2008"
"10-16-2008" "10-17-2008" "10-20-2008" "10-21-2008" "10-22-2008"
"10-23-2008"
2008 Sep 11
4
All possible pairs of two variables
I have two variables (x,y) :
x : it takes all integer values from 0 to y and,
y : takes all values from 0, 10
I am looking for some R code to find all possible pairs of (x,y). Can anyone please help me?
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2007 Apr 18
5
Problem with ?curve
Dear all R gurus,
I have following syntax:
y = c(1:10)
chippy <- function(x)
{
y[5] = x
sin(cos(t(y)%*%y)*exp(-t(y)%*%y/2))
}
curve(chippy, 1, 20, n=200)
But I am getting error while executing :
Error in xy.coords(x, y, xlabel, ylabel, log) :
'x' and 'y' lengths differ
In addition: Warning message:
number of items to
2012 Dec 26
3
Working with date
Hi,
Let say I have a date variable:
> ?asd <- as.Date("2012-01-03")
> asd
[1] "2012-01-03"
Now, I want to express this date like 3/1/2012.
can somebody help me how to achieve that?
Thanks,
2008 Nov 08
2
[Stat related] Understanding Portmanteau test
Sorry to be off-topic. Can somebody please explain me what is Portmanteau
test? Why it's name is like that? When I would say, a particular test is
portmanteau test? I did some googling but got no satisfactory answer at all.
Please anybody help for understanding that?
Regards,
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2008 Nov 20
2
How to Clear all variables stored in current and previous sessions
Is there any function in R to clear values from all variables stored in
current and previous sessions? R site search do not give the desired result
at all, all results are about to clear screen only not variables.
Thanks,
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2009 Jun 18
2
Altering columns
Hi,
Suppose I have following dataset :
mat <- matrix(rnorm(100), 50)
Now I want to put 2nd column in the place of 1st and 1st column in the place
of 2nd. Is there any "quick" way to do that?
Thanks and regards,
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2010 Sep 15
3
Keyword to clear the screen
Hi all, can anyone please tell me what is the key-word to clear the screen? I am aware of the "cont+L", however I need some R-syntax, that can be typed into the console to clear the screen.
Thanks
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2009 Nov 13
2
All combination
Please consider the following :
> expand.grid(rep(list(c(1:3)), 3))
Var1 Var2 Var3
1 1 1 1
2 2 1 1
3 3 1 1
4 1 2 1
5 2 2 1
6 3 2 1
7 1 3 1
8 2 3 1
9 3 3 1
10 1 1 2
11 2 1 2
12 3 1 2
13 1 2 2
14 2 2 2
15 3 2 2
16 1 3 2
17 2 3 2
18