Displaying 20 results from an estimated 2000 matches similar to: "Combinations"
2009 Dec 04
3
Combinations and joint probabilities
Dear R helpers
Suppose I have two sets of ranges (interest rates) as
Range 1 : (7 – 7.50, 7.50 – 8.50, 8.50 – 10.00) with respective probabilities 0.42, 0.22 and 0.36.
Range II : (11-12, 12-14, 14-21) with respective probabilities 0.14, 0.56 and 0.30 respectively.
My problem is to form the combinations of these ranges in a decreasing order of joint probabilities. It is assumed that
2009 Dec 23
2
Mean, median and other moments
Hi!
Suppose I have a dataset as follows
pd = c(10,7,10,11,7,11,7,6,8,3,12,7,7,10,10)
I wish to calculate the mean, standard deviation, median, skewness and kurtosis i.e. regular standard statistical measures.
average = mean(pd)
stdev = sd(pd)
median = median(pd)
skew = skewness(pd)
kurt = kurtosis(pd)
Q. No (1)
How do I get these at a stretch using some R package? I came across
2010 Feb 03
2
How to change output 'csv' file
Dear R helpers
After executing the R code, where the last few lines of the code are something like given below.
## Part of my R code
n = 20
........
.........
final_output = data.frame(Numbers = numbers, ABC = data1, XYZ = data2, PQR = data3)
write.csv(data.frame(Scenario = paste("Sc_", 1:n, sep = ""), final_output'), 'result.csv', row.names
2010 Feb 12
1
how to read csv file having variables unequal column sizes
Dear R helpers
Suppose e.g. I have a csv file having three variables defined and each of these variables have data items of say 40, 50, 45 length. When I open this csv file in 'R', I get 10 trailing 'NA's under first column and 5 'NA' s in case of 3rd column.
How do I get rid of these NA's s.t. when I read the first column, there should be only 40 data items, 2nd
2010 Feb 18
1
Matrix in a Reverse order
Dear 'R' friends
I have a sort of stupid question to ask.
I have a matrix say of the order 4 X 3 as
83 98 90
21 83 84
70 39 56
65 29 38
Is there any command in R which will reverse the order i.e. I need to have same 4 X 3 matrix but as given below
65 29 38
70 39 56
21 83 84
83 98 90
i.e. the last row becomes first row, second - last row
2008 Jun 10
2
How to join data.frames and vectors of different length, in an inteligent way?
I have a data set something like this:
"YYYY", "Value"
1972 , 117
1984 , 73
1969 , 92
1976 , 113
1999 , 80
1996 , 78
1976 , 98
1984 , 106
1976 , 99
it could be created with:
> dafSamp <- data.frame(cbind(c(1972,1984,1969,1976,1999,1996,1976,1984,1976),c(117,73,92,113,80,78,98,106,99)))
The real dataset is of cause much larger, app. 100.000 samples
2009 Dec 15
1
Changing Column names in (Output) csv file
Dear R helpers
Following is a part of R code.
data_lab <- expand.grid(c("R11", "R12", "R13"), c("R21", "R22", "R23"), c("R31", "R32", "R33"), c("R41", "R42", "R43"), c("R51", "R52", "R53"), c("R61", "R62", "R63"),
2010 Aug 17
2
dims error
Greetings,
I am a very novice user with R, and in the course of running a linking procedure :
P.old<- function (a, c, b, xi){
#a contains a parameters
#c contains c parameters
#b contains b parameters
#xi is a one column vector containing quadrature points for xi(=theta-gamma)for one item
tmp <- a*(xi-b)
2010 Feb 10
4
Readjusting the OUTPUT csv file
Dear R helpers
I have some variables say ABC, DEF, PQR, LMN and XYZ. I am choosing any three varaibles at random at a time for my analysis and name these files as input1.csv, input2.csv and input3.csv. So if I choose variables say ABC, DEF and PQR, I am passing the specifications of these variables to input1.csv, input2.csv and input3.csv respectively.
This means in another case even if I
2010 Aug 23
4
Draw a perpendicular line?
Hi,
I am trying to draw a perpendicular line from a point to two points.
Mathematically I know how to do it, but to program it, I encounter some
problem and hope can get help. Thanks.
I have points, A, B and C. I calculate the slope and intercept for line
drawn between A and B.
I am trying to check whether I can draw a perpendicular line from C to line
AB and get the x,y value for the point D
2009 Jul 14
2
hi friends, is there any wait function in R
hi,
is there any wait function in R. I am running one R script to plot
many graphs it is in the for loop. its showing no error but its not
plotting well I think i can solve this problem with a wait function.
Please help me in this regards. If u need any clarification about
programme. u can find the script below.
best regards,
Deepak.M.R
Biocomputing Group
University of Bologana.
#!/usr/bin/R
2011 Nov 30
1
All combinations
Dear all,
I would like something simple to do in R that I do not know how I should search for it.
Let's say that I have a list of
a<-c(1,2,3,4,5)
b<-(6,7,8)
and I want to get back all their possible cominations like
1,6
1,7
1,8
2,6
2,7
2,8
3,6
3,7
3,8
and so on.
How I can do that?
B.R
Alex
[[alternative HTML version deleted]]
2011 Mar 11
2
How to get all combinations between two character vectors?
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Hi
I know there is a function - I have used it before - but I always forget
what it is called...
I need the combination of two character vectors, i.e:
x <- c("a", "b")
y <- c("x", "y")
z <- THEFUNCTION(x, y)
z == c("ax", "ay", "bx", "by")
I promise I will
2004 Jan 06
2
How to flash hook when there is no hook ?
Hi all,
I'm using regular analog phones with * and an ATA186, and I plan to move
to cordless phones. But cordless phones usually have no way to flash
hook cause there is no hook :-)
I seem to recall there is a way to simulate a flash hook using dtmf
tones in *, but I can't find which combination to use.
More generally, where can I find all those magic cominations to put
people on hold,
2010 Dec 22
3
Help with Amelia
Hi
I have used the amelia command from the Amelia R package. this gives me a number
of imputed datasets.
This may be a silly question, but i am not a statistician, but I am not sure how
to combine these results to obtain the imputed dataset to usse for further
statistical analysis. I have looked through the amelia and zelig manuals but
still can not find the answer. This maybe because I dont
2012 Oct 30
1
Amelia imputation - column grouping
Hi everybody,
I am quite new to data imputation, but I would like to use the R package '
Amelia II: A Program for Missing Data '. However, its unclear to me how
the input for amelia should look like:
I have a data frame consisting of numerous coulmns, which represent
different experimental conditions, whereby each column has 3 replicates. I
want amelia to perform an imputation across
2011 Jul 14
1
Amelia_Multiple_Imputation_with_observational_priors_noms
I am fairly new at using R/programming in general so I apologize if I am
leaving crucial parts of the puzzle out, but here goes.
First and foremost this is the error I am receiving:
Error in muPriors[priors[, 1:2]] <- priors[, 3] :
NAs are not allowed in subscripted assignments
This occurs only when I am using observational priors and some number of
nominal variables, it does not
2012 Dec 11
1
Debian packaging and openblas related crash when profiling in R
Hello R-sig-debian and (hopefully) Dirk:
On Debian wheezy, I have the R packaging that CRAN (you) provide. I
run into a little trouble while trying to fiddle with alternative
BLAS.
I know you and I went around on this last year and I think perhaps
I've found something wrong in the framework, or I've just done
something wrong.
I installed the packages openblas-base and openblas-dev, and
2012 May 19
2
how to predict/forecast missing values in time series ?
i have time series as
1.3578511
0.5119648
1.3189847
0.9214787
1.2272616
4.9167998
1.2272616
1.2272616
0.8854192
2.3386331
1.6132899
0.2030302
0.8426226
1.2277843
NA
1.3189847
1.3578511
0.8530141
2.3386331
1.0541099
0.7747481
0.5764672
1.3189847
1.2160533
1.2272616
0.6715839
0.9651803
1.6132899
1.2006974
0.6875047
1.3245534
1.2006974
0.8221709
1.3101684
1.6132899
1.6132899
1.2006974
1.3189847
2013 Jan 07
1
Amelia algorithm
Dear all.
First of all, my english isn't verry good, but I hope I can convey my concern.
I've a general question about the Amelia algorithm. I'm no mathematician or
statistician, but I had to use R and impute and analyse some data, and Amelia
showed results that fitted my expectations. I'll have to defend my choice soon,
but I haven't totally grasped what Amelia does. I'm