Displaying 20 results from an estimated 1000 matches similar to: "Linear Regression"
2007 Oct 02
5
Linear Regression
Hello,
I would like to fit a linear regression and when I use summary(), I got the
following result:
Call:
lm(formula = weight ~ group - 1)
Residuals:
Min 1Q Median 3Q Max
-1.0710 -0.4938 0.0685 0.2462 1.3690
Coefficients:
Estimate Std. Error t value Pr(>|t|)
groupCtl 5.0320 0.2202 22.85 9.55e-15 ***
groupTrt 4.6610 0.2202 21.16 3.62e-14
2007 Jul 03
4
sequences
Hi, I would like to generate a series in the following form (0.8^1, 0.8^2,
..., 0.8^600)
Could anyone tell me how can I achieve that? I am really new to R.
--
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Sent from the R help mailing list archive at Nabble.com.
2007 Jul 05
3
Loop and function
Hi All, I am trying to make a loop for a function and I am using the
following codes. "p" and "var" are some matrix obtained before. I would like
to apply the function "gpdlow" for i in 1:12 and get the "returnlow" for i
in 1:12. But when I ask for "returnlow" there are warnings and it turns out
some strange result.
for (i in 1:12){
gpdlow
2007 Jun 19
2
Histogram
Hello, I am using the following codes to plot a histogram and density line
for x. For the density line, I just want it to show the two tails, eg, for x
larger than 0.05 ans smaller than -0.05
hist (x, seq(-0.1,0.1,0.01),freq = FALSE)
lines (density(x,bw="SJ"), x> 0.05 & x< (-0.05), col = "red")
But is does not work, can anyone give me some advice?
--
View this
2007 Dec 03
2
Linear Regression, Data is a list
Hello,
I would like to perform a linear regression and the data is a list.e.g
lm(list$abc~., data=list) or lm(abc~., data=list), which would give the same
result.
The problem is I would like to call the response variable in a more general
form. What I try to achieve is sth like lm(list$(paste("a","b","c"))~.,
data=list), but it does not work.
Could anyone give me
2007 Jul 10
3
ECDF, distribution of Pareto, distribution of Normal
Hello all,
I would like to plot the emperical CDF, normal CDF and pareto CDF in the
same graph and I amusing the following codes. "z" is a vector and I just
need the part when z between 1.6 and 3.
plot(ecdf(z), do.points=FALSE, verticals=TRUE,
xlim=c(1.6,3),ylim=c(1-sum(z>1.6)/length(z), 1))
x <- seq(1.6, 3, 0.1)
lines(x,pgpd(x, 1.544,0.4373,-0.2398), col="red")
y
2007 Jun 29
2
cbind
Hi, I have a series of return data, a and b are factors. I would like to
build a matrix which contains each vector of "returns". I am thinking about
something as following, but I guess there should be a sensible way of doing
this.
returns <- split(return, list(regimef, assetf))
cbind(returns[[1]], returns[[2]],...,returns[[n]])
Could anyone give me some advice? Many thanks.
--
2007 Sep 17
2
vector name
I have got a list named "filtered", I would like to construct alist named
"fdata" as following:
fdata <- cbind(matrix(unlist(filtered),ncol=28), myregime)
If I try names(filtered), it gives all the correct name for each vector, but
if I try names(fdata), it appears "filtered[[1]]" "filtered[[2]]" ...,
How can I keep the name in "fdata"?
2007 Oct 31
2
cbind()
Hello,
I would like to use the cbind() function to construct a matrix used in the
middle of a function as following
for (i in 1:1000) {
b[i] <- function(cbind(a[[1]][[i]],
a[[2]][[i]],a[[3]][[i]],...a[[67]][[i]]))
}
Is there an easy way of achieving this rather than "cbind" every column?
--
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2007 Jun 19
2
Function -return value
Hi, I am trying to write a function with the following codes and I would like
it to return the values for "alpha
beta para parab " seperately. Then I would like to use this funstion for
"variable" with factor "a" and "b". But the result turns out to be a matrix
with element like "Numeric,2" ... I guess they are just the values for
2007 May 31
2
Import data from Access
Hi, I want to import some data from Access and I am using the following
codes:
testdb <- file.path("c/../db1")
channel <- odbcConnect("testdb")
sqlFetch(channel,"tbl",colnames = TRUE, rownames = FALSE)
It comes out the error message:
1: [RODBC] ERROR: state IM002, code 0, message [Microsoft][ODBC Driver
Manager] Data source name not found and no default
2003 Apr 02
2
pacf.mts
I am getting the following:
*** Weave Errors ***
Error in driver$runcode(drobj, chunk, chunkopts) :
Error in eval(expr, envir, enclos) : couldn't find function "pacf.mts"
*** Source Errors ***
Error in eval(expr, envir, enclos) : couldn't find function "pacf.mts"
make[1]: *** [checkVignettes] Error 1
I don't really understand the new namespace mechanism,
2010 Sep 04
1
tail.matrix returns matrix, while tail.mts return vector
Hi
I have a few problems with tail/head when applied to multiple time
series. I'm not sure as whether I did not understand the function or
whether it correspond to an unexpected behavior.
When head(a,n) is applied on data.frame or matrix, it returns a
data-frame or matrix with first n obs of *each* variable. When applied
to a mts object, it returns first n obs of *first* variable only,
2001 Jul 03
1
plot.mts() with type="p" (PR#1010)
There appears to be a bug in plot.mts() in R-1.3.0 when attempting to
do a multiple point plot (this worked in 1.2.2).
Reproduce by:
> version
_
platform sparc-sun-solaris2.8
arch sparc
os solaris2.8
system sparc, solaris2.8
status
major 1
minor 3.0
year 2001
2007 Sep 12
2
Tick intervals
Hi, I would like to plot a histogram with the following codes, and I would
like to make the tick intervals smaller. I tried to add "lab=c(1,1,12)", but
nothing changes.
par(mfrow=c(1,1),font=1, cex=0.8)
hist (data1, seq(-0.01,0.3,0.01),freq = FALSE,
main="Figure1.",xlab="return",lab=c(1,1,12))
lines(density(data1), col="blue")
Could anyone give me sone
2009 Jan 06
5
Changing Matrix Header
Dear all,
I have the following matrix.
> dat
A A A A A A A A A A
[1,] 0 0 0 0 0 0 0 0 0 0
[2,] 0 0 0 0 0 0 0 0 0 1
[3,] 0 0 0 0 0 0 0 0 0 2
How can I change it into:
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,] 0 0 0 0 0 0 0 0 0 0
[2,] 0 0 0 0 0 0 0 0 0 1
2009 Jul 16
2
ffmpeg2theora 0.24 regression: accelerated video output (converted from h264)
Here's another problem I have with the 0.24 version of ffmpeg2theora.
When I try to convert a h264 file to theora...
(Note that for size and runtime reasons, foo.mts is a truncated file,
I just took the first 32MB of the original file)
ffmpeg2theora-0.24.linux32.bin foo.mts -x 1280 -y 720 -o
foo-ffmpeg2theora-0.24.ogv
Input #0, mpegts, from 'foo.mts':
Duration: 00:00:15.83, start:
2013 May 02
5
[PATCH 0/3] vhost-scsi: file renames
This reorgs the files a bit, renaming tcm_vhost to
vhost_scsi as that's how userspace refers to it.
While at it, cleanup some leftovers from when it was a
staging driver.
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
Michael S. Tsirkin (3):
vhost: src file renames
tcm_vhost: header split up
vhost_scsi: module rename
drivers/vhost/Kconfig | 10 ++-
2013 May 02
5
[PATCH 0/3] vhost-scsi: file renames
This reorgs the files a bit, renaming tcm_vhost to
vhost_scsi as that's how userspace refers to it.
While at it, cleanup some leftovers from when it was a
staging driver.
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
Michael S. Tsirkin (3):
vhost: src file renames
tcm_vhost: header split up
vhost_scsi: module rename
drivers/vhost/Kconfig | 10 ++-
2008 Nov 26
8
Mobile as FXO
Greetings List,
I have configured chan_mob for Nokia 7610. I can succefully dial from
softphone to mobile and land line numbers,
Softphone (PC) =====> Asterisk ====> FXO (Nokia 7610) ====> Destination
Number
When call is established I have to use Nokia 7610 for conversation. Is it
possible to use softphone, dial via mobile phone and have conversation using
softphone?