Displaying 20 results from an estimated 10000 matches similar to: "Equality of Vectors"
2010 Jun 22
5
Displaying Iteration Count
Hello,
I'm running a very long for loop that usually takes hours. For my own piece
of mind, it would be nice if I could check periodically and see which
iteration the loop is on. A line of code that told R to print the iteration
number every 100 or 200 iterations would be perfect.
Does anyone know something like this? I've never known how to print
anything within a for loop before the
2011 Sep 23
4
'save' saved object names instead of objects
Hello,
I created an array to hold the results of a series of simulations I'm
running:
d.eta <- array(0,dim=c(3,3,200))
<simulation goes here and populates the array but it's not important>
Then I tried to save the results using this:
save(d.eta,file="D:/Simulation Results/sim 9-23-11 deta")
When I later tried to reload them using this:
d.eta <-
2011 May 17
2
Minimum value by ID
Hello,
I have a longitudinal dataset where each individual has a different number
of entries. Thus, it is of the following structure:
x <- runif(12)
id.var <- factor(c(rep("D1",4),rep("D2",2),rep("D3",3),rep("D4",3)))
dat <- as.data.frame(x)
dat$id.var <- id.var
dat
> dat
x id.var
1 0.9611269 D1
2 0.6738606 D1
3
2011 Jul 01
2
merge function
Hello,
I'm clearly confused about the merge function. In the following
r <- merge(x,y,all.x=T,all.y=F)
my y vector has only unique values (no duplicates). So I don't understand
how this can ever generate an r which is of greater length than x.
I thought the default behavior was only matching rows are included, but
that using all.x=T included rows with unmatched x's as well. If
2011 May 29
1
Setting max. iterations for lmer
Hello,
I hate to ask a question which is directly addressed in the documentation,
but can someone please give me an example of how to change the maximum
number of iterations used by lmer. I'm having a hard time understanding
this:
control a list of control parameters. See below for details.
control
a named list of control parameters for the estimation algorithm, specifying
only
2011 Nov 09
2
Installing binaries from R-Forge
Hello,
I'm attempting to install the splm package from R-Forge.
https://r-forge.r-project.org/R/?group_id=352
The page says, "In order to successfully install the packages provided on
R-Forge, you have to switch to the most recent version of R..." It later
says "To install this package directly within R type:
install.packages("splm",
2012 Mar 08
1
Panel models: Fixed effects & random coefficients in plm
Hello,
I am using {plm} to estimate panel models. I want to estimate a model that
includes fixed effects for time and individual, but has a random individual
effect for the coefficient on the independent variable.
That is, I would like to estimate the model:
Y_it = a_i + a_t + B_i * X_it + e_it
Where i denotes individuals, t denotes time, X is my independent variable,
and B (beta) is the
2011 Feb 25
1
Hierarchical Power Analysis
Hello,
A colleague is trying to do a fairly complicated power analysis for a
project. The project would be evaluating random assignment to one of three
conditions within each of 8 sites. The dependent variable would be binary
(we do not care at this point whether it would be analyzed with logit or
probit).
We can simulate the data in a bunch of iterations and do analyses in each
iteration, but
2010 Apr 19
2
ecdf
Hello,
I'd like to plot an empirical cumulative distribution function, except
instead of the fraction of values < x, I'd like the fraction of values > x.
I think this can be done using the ecdf function in {Hmisc}. I installed
the package and loaded it. However, when following the example given in the
documentation, I get an error:
x <- rnorm(100)
ecdf(x,what='1-F')
2010 Mar 11
1
VAR with contemporaneous effects
Hi,
I would like to estimate a VAR of the form:
Ay_t = By_t-1 + Cy_t-2 + ... + Dx_t + e_t
Where A is a non-diagonal matrix of coefficients, B and C are matricies of
coefficients and D is a matrix of coefficients for the exogenous variables.
I don't think the package {vars} can do this because I want to include
contemporaneous cross-variable impacts.
So I want y1_t to affect y2_t and I
2010 Apr 12
1
Strange results from Multivariate Normal Density
Hello,
I'm using dmnorm from the package {mnormt} and getting strange results.
First, according to the documentation, dmnorm should return a vector of
densities, and I'm only getting one value returned (which is what I would
expect). I've been interpreting this as the joint density of all values in
the x vector (which is what I want). Should a vector of densities be
returned, and if
2009 Apr 16
2
Count data with several numbers separated by commas
Dear all,
I have a data file with 3 variables (x1, x2, x3) where variable x1
have data that consists of several numbers separated by commas.
id name x1 x2 x3
aa101 1,4,5 2 1
aa102 1,2,5 1 2
aa103 1,2,5 1 1
aa104 1,2,3 1 2
aa105 1,5 2 2
aa106 1,2,5 2 2
aa107 1,2,5 2 1
aa108 1,4,5 2 1
aa109 1,2 1 2
aa110 3,5 1 2
I want to count the number of data for each
2005 Jun 26
2
is.all.equal
Hi,
The description of all.equal states "is.all.equal should be used for
programming, typically in if expressions. It is a simple wrapper using
identical as shown in the documentation there.", but is.all.equal is
not explicitly defined there (although there is a hint in the comments
that is.all.equal <- function(x,y) isTRUE(all.equal(x,y))).
Could the documentation be corrected? (or
2005 Aug 29
5
Testing if all elements are equal in a vector/matrix
Is there a canonical way to check if all elements of a vector or matrix are
the same? Solutions below work, but look hackish to me.
> x <- rep(1, 10)
> all(x == x[1]) # == operator does not provide for small differences
[1] TRUE
> isTRUE(all.equal(x, rep(x[1], length(x)))) # ugly
[1] TRUE
Best,
Vincent
--
Vincent Goulet, Associate Professor
??cole d'actuariat
2009 Feb 16
2
solve.QP with box and equality constraints
Dear list,
I am trying to follow an example that estimates a 2x2 markov transition
matrix across several periods from aggregate data using restricted least
squares.
I seem to be making headway using solve.QP(quadprog) as the unrestricted
solution matches the example I am following, and I can specify simple
equality and inequality constraints. However, I cannot correctly specify a
constraint
2006 Feb 03
2
all.equal() and which()
Please excuse the lack of a complete dataset here, if its needed I'll be
happy to provide it.
Can anyone show me how to rewrite this?
Browse[1]> time(data)[24210:24220]
[1] 24.209 24.210 24.211 24.212 24.213 24.214 24.215 24.216 24.217
[10] 24.218 24.219
Browse[1]> which(time(data)==24.211)
numeric(0)
I'm assuming its an eps fault but
which(all.equal(time(data),24.211))
dosnt
2018 Sep 03
2
compairing doubles
Maybe a new Operator could be defined for a fast and easy double
Comparison: `~~`
`~~` <- function (e1, e2) all.equal(e1, e2)
And document it properly.
2010 Apr 07
1
Vectorized forms of isTRUE, identical and all.equal?
Dear all,
I'm wondering if there exist vectorized forms of 'isTRUE()',
'identical()' and 'all.equal()'. My problem is that I wish to test if
each element of a vector is equal to a particular value (or
numerically close), whilst dealing carefully with NAs and so on.
However, using sapply() with identical() is very slow because it makes
so many separate function calls:
2009 Jun 16
1
Testing if all elements are equal in a vector/matrix
Hi All,
There are several replies to the question below, but I think there must
exist a better way of doing so.
I just want to check whether all the elements of a vector are same. My
vector has one million elements and it is highly likely that there are
distinct elements in the first few itself. For example:
> x = c(1,2,rep(1,100000))
I want the answer as FALSE, which is clear from the
2005 Aug 17
7
Need help with the rubyonrails wiki - instiki filters
I am trying to do a tutorial improvement on the wiki but I am having
some problems with the auto formatting. Using httdp.conf produces
http://httpd.conf when filtered. Using *.so produces .so and bold text
there after.
Is there any shorthand for the user for making text appear as it should
without the linking and re-writes? Or does the admin have to change the
filters in Instiki?
Tesla