Dear all R users,
I wanted to calculated a sample Variance covariance matrix of a five-variate
normal distribution. However I stuck to calculate each element of that matrix.
My question is should I calculate ordinary variance and covariances, taking
pairwise variables? or I should take partial
Dear all R users,
Is there any function to omit repeated values in a vector? Your help will be
highly appreciated.
Thanks
stat
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Dear all,
Suppose I have a date variable:
c = "99/05/12"
I want to extract the parts of this date like month number, year and day. I
can do it in SPSS. Is it possible to do this in R as well?
Rgd,
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Heres a
Dear all R users,
Suppose I have a dataset like that, data =
1 1.957759e-09
2 1.963619e-09
3 1.962807e-09
4 1.973951e-09
5 1.983401e-09
6 1.990894e-09
7 2.000935e-09
8 1.998391e-09
9
Dear R users,
I did following with a date variable
library(date)
date = "03/11/05"
date = as.Date(date, format="%m/%d/%y")
date
[1] "2005-03-11"
s = vector(length=3)
s[1] = date
s[1]
[1] 12853
But here I got s[1] as 12853. But this is not that I want. I need s[1] as
original date.
Good day,
Here I was trying to write a code for Garch(1,1)
. As garch problem is more or less an optimization
problem I also tried to get the algorithm for "nlminb"
function. What I saw that if use this function
'nlminb" I can easyly get the estimate of parameters.
But any other function is n
Dear all R users,
I am wondering whether it is possible in R to rotate any plot like Histogram,
scatter plot, correlogram etc along with their legend, comments etc.
Thanks and regrads,
stat
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Find out what India is ta
Dear all R users,
Suppose,
Dear all R users,
Suppose,
pauto.cor = pacf(lh, plot=F)
max.lag = max(pauto.cor$lag)
min.lag = min(pauto.cor$lag)
centre = (max.lag - min.lag)/2
pauto.cor = pauto.cor$acf
pauto.cor = pauto.cor[-1]
par(mar=c(3,0,1,1))
barplot(pauto.cor, axes=F,xlim=c(max(pauto.cor),
Dear all,
May be question seems trivial for most of the R
users, but really at least for me, this comes out to
be very problematic.
Suppose I have the following data:
> r
[1] -0.0008179960 -0.0277968529 -0.0105731583
-0.0254050262 0.0321847131 0.0328170674
[7] 0.0431894392 -0.0217614918
Dear all R users,
I am wondering if there is any way to define a 3 dimentional or 4 dimentional
array in R.
Sincerely yours,
thanks in advance
Send instant messages to your online friends http://in.messenger.yahoo.com
Stay connected with your friends even when away from PC.
Dear all R users,
Suppose I have a data frame "data" like this:
5/2/2006 36560
5/3/2006 36538
5/4/2006 36452
5/5/2006 36510
5/8/2006 36485
5/9/2006 36502
5/10/2006 36584
5/11/200636571
Now I want to create a for loop like this:
date =
Dear all R users,
I have a query on "Edit" function. Suppose I have a data frame named "data".
I can use EDIT function to see the materials contained in data, by using the
command:
> edit(data)
But when I close the window then again the materials contained in data is
displayed
Dear r users,
Few days ago I posted the same topic but unable to receive any suggestion. So
I am asking this same question.
I was trying to fit a garch(1,1) model to my dataset. But while executing I
got a warning message "NaNs produced in: sqrt(pred$e)". And got the estimated
sd's
Dear r users,
I was trying to fit a garch(1,1) model to my dataset. But while executing I
got a warning message "NaNs produced in: sqrt(pred$e)". And got the estimated
sd's along with five "NA", but as per my best knowledge I should get only one
"NA" i.e. corresponding to the first observa
Dear r-users,
Suppose I have three datasets:
Dataset-1:
Date x y
Jan-1,2005120 230
Jan-2,2005123 -125
Jan-3,2005-110 300
Jan-4,2005114 -21
Jan-7,200511299
Mar-5,2005200 311
Dataset-2:
Date
Dear r-users,
Suppose I have three datasets:
Dataset-1:
Date x y
Jan-1,2005120 230
Jan-2,2005123 -125
Jan-3,2005-110 300
Jan-4,2005114 -21
Jan-7,200511299
Mar-5,2005200 311
Dataset-2:
Date
Dear R-users,
I am wondering if anyone can tell me how Garch coefficients are calculated in
R. What is algorithm for that? If anyone give me a detail desceiption I will be
very grateful.
Thanks and Regards,
stat74
thanks in advance
hi all
can anyone tell me what is head() function in r. what
is it's utility?
thanks in advance
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hi all,
Somewhere I got a phrase - the function returns a S3 object of class "hclust"
- can anyone tell me what is "S3 objects"?
thanks in advance
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hi everyone,
Suppose I have three variables a, b, and c each with 10 values. Now I
construct a corr matrix for them. Now I want to give the names of columns of
corr matrix as a, b, c, i.e. the first column of corr matrix will have name as
a second column with b and so on. Can anyone gi
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