Displaying 20 results from an estimated 400 matches similar to: "Create DataSet with MCAR type"
2010 Oct 05
2
Sampling from data set
Dear all.
I have data with 2 variable x,y size 10000.
I want to sampling from this data with size 100.
How I can do it.
THANK.
--
Jumlong Vongprasert
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
THAILAND
34000
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2010 Nov 06
4
calculate probability
Dear All
I have 2 value assume 2.4 and 2.9 and mean = 2 variance = with n = 10
I want to find probability = 2.4 and 2.9.
How I can do this.
Many Thanks.
Jumlong
--
Jumlong Vongprasert Assist, Prof.
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
THAILAND
34000
[[alternative HTML version deleted]]
2010 Nov 08
2
conditional probability
Dear all
I have problem with calculate probability, I have data x1,...,x10,
I want to calculate probability x11 given x1,...,x10 with two conditions.
1. x is normal
2. unknow distribution
How I can do this.
Many Thanks.
Jumlong
--
Jumlong Vongprasert Assist, Prof.
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
2010 Oct 19
2
calculate power of test
Dear All
I want to calculate power of test. I want to test H0: Rho = 0 VS H1: Rho
!= 0.
Assume, I have r=0.2 and sample size = 100.
How I can do this.
Many Thanks
Jumlong
--
Jumlong Vongprasert Assist, Prof.
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
THAILAND
34000
[[alternative HTML version deleted]]
2010 Oct 15
4
split data with missing data condition
Dear all
I have data like this:
x y
[1,] 59.74889 3.1317081
[2,] 38.77629 1.7102589
[3,] NA 2.2312962
[4,] 32.35268 1.3889621
[5,] 74.01394 1.5361227
[6,] 34.82584 1.1665412
[7,] 42.72262 2.7870875
[8,] 70.54999 3.3917257
[9,] 59.37573 2.6763249
[10,] 68.87422 1.9697770
[11,] 19.00898 2.0584415
[12,] 60.27915 2.5365194
[13,] 50.76850
2010 Oct 20
1
remove unused variable and data
Dear All
I have this
> ls()
[1] "IWJR.complete" "IWJR.missing" "IWJR.reg.temp"
[4] "IWJR.reg.temp.x" "IWJR.reg.temp.y" "IWJR.temp"
[7] "Power.record.100.3.5" "col.delete" "correlation.100.3.5"
[10] "i" "index.temp"
2011 Sep 04
1
Test for Random Walk and Makov Process
Dear All
I want to test my data for Random Walk or Markov Process.
How I can do this.
Many Thanks
--
Jumlong Vongprasert Assist, Prof.
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
THAILAND
34000
[[alternative HTML version deleted]]
2010 Nov 12
1
calculate variance with trimm mean
Dear All
I have problem about calculte variance use R.
I use trimm mean by mean(x, trim=.05) and I want to calculate variance
with trimm=.05.
How I can do this.
Many Thanks.
Jumlong
--
Jumlong Vongprasert Assist, Prof.
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
THAILAND
34000
[[alternative HTML version deleted]]
2010 Oct 15
1
Impute missing data by regression in R
Dear all
I have data (x,y) with data x is missing in 5 record of 100 record.
I want to impute data x by use regression.
How I can do this.
THX
Jumlong
--
Jumlong Vongprasert Assist. Prof.
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
THAILAND
34000
2011 Jan 23
2
Problem with combined two data frame.
Dear All.
I have some problem with combined two data frame.
....
I have first data frame ..
GPAX THAI MATH SCINCE SOCIAL HEALT ART CAREER LANGUAGE
1227 2.99 3.32 2.50 2.64 3.05 3.60 3.72 3.57 2.62
1704 2.81 2.56 2.48 2.86 3.22 3.19 3.55 3.20 2.51
617 2.18 1.90 1.97 2.06 2.38 3.50 3.54 2.33 1.70
876 2.82 3.14 2.73 2.46 2.71 3.11 3.04 3.24 2.90
2010 Oct 16
1
Error in eval(expr, envir, enclos) : object 'x' not found
Dear all
I tried to use regression to predicted mu data, but it has error like this:
> IWJR.complete
x y
[1,] 33.17635 2.4705021
[2,] 81.61225 3.3815620
[3,] 65.47392 1.6518975
[4,] 57.97806 1.6110785
[5,] 76.05528 2.1601246
[6,] 41.36090 1.5498132
[7,] 68.77844 2.8078691
[8,] 55.57040 2.1183063
[9,] 41.29287 1.8015709
[10,] 65.43935 2.3483183
[11,] 22.44821
2011 Sep 04
0
Markov Switching GARCH Package
Deal All
I want to use MSGARCH for my data.
What package I will used.
Many THanks
--
Jumlong Vongprasert Assist, Prof.
Institute of Research and Development
Ubon Ratchathani Rajabhat University
Ubon Ratchathani
THAILAND
34000
[[alternative HTML version deleted]]
2005 Nov 14
1
Little's Chi Square test for MCAR?
Hi.
Can anyone point me to any module in R which implements "Little's Chi
Square test" for MCAR.
The problem is that i have around 60 behavioural variables on a 6 point
categorical scale which i need to test for MCAR and MAR. What i can make
out from preliminary analysis is that moderate (0.30 to 0.60)
correlations may be present in several variable pairs leading me to
suspect
2012 Nov 30
1
Little's Chi Square test for MCAR?
Is there any further development in R to identify the missing data Mechanism?
Would you please help ?
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2010 Aug 19
0
Little's MCAR test
L.S.,
Does anyone know if there is an R library which implements Little's MCAR
test for completely at random missing values? It is implemented in SPSS and
SAS, and widely mentioned in the literature.
Thanks in advance!
Sander van Kuijk
--
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2011 Feb 07
1
multiple imputation manually
Hi,
I want to impute the missing values in my data set multiple times, and then
combine the results (like multiple imputation, but manually) to get a mean
of the parameter(s) from the multiple imputations. Does anyone know how to
do this?
I have the following script:
y1 <- rnorm(20,0,3)
y2 <- rnorm(20,3,3)
y3 <- rnorm(20,3,3)
y4 <- rnorm(20,6,3)
y <- c(y1,y2,y3,y4)
x1 <-
2010 Aug 30
1
New to R
I'm relatively new to R, and not particularly adept yet, but I was wondering
if there was a simply way to simulate missing data that are MAR, MNAR and
MCAR. I've got a good work-around for the MCAR data, but it's sort of hard
to work with.
Josh
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2012 Aug 13
1
R-help question
Hi there,
I have subscribed to R-help but am not sure how to view or post questions? I think this is the right way.
I am planning on doing a multivariate regression investigating the relationship between depression (a continuous variable) and social support variables (mostly continuous, some categorical) among older people. I have a number of demographic and health-related variables that I am
2011 Jun 03
3
Not missing at random
Hello!
I would like to sample 30 % of cases (with at least 1 value lower than 3) and
among them I want to set all values lower than 3 (within selected cases) as NA
(NMAR- Not missing at random). I managed to sample cases, but I don’t know how
to set values (lower than 3) as NA.
R code:
x <-
2010 Apr 04
2
logistic regression in an incomplete dataset
Dear all,
I want to do a logistic regression.
So far I've only found out how, in a dataset of complete cases.
I'd like to do logistic regression via max likelihood, using all the study
cases (complete and incomplete). Can you help?
I'm using glm() with family=binomial(logit).
If any covariate in a study case is missing then the study case is
dropped, i.e. it is doing a complete case