Displaying 20 results from an estimated 3000 matches similar to: "mspath analyzes transitions between multiple state with history dependence"
2004 Nov 05
0
R check passes code and docs that don't match
I have code and documentation that don't match, but R CMD check didn't
flag it.
in mspath.R
mspath <- function(formula, # formula with observed Markov states
~ observation times (required)
qmatrix, # matrix of 1s and 0s with indices of
allowed transitions (diagonal is ignored) (required)
misc = FALSE,
ematrix = NULL, # matrix
2010 Nov 22
1
using rpart with a tree misclassification condition
Hello
I want to build a classification tree for a binary response variable
while the condition for the final tree should be :
The total misclassification for each group (zero or one) will be less then
10% .
for example: if I have in the root 100 observations, 90 from group 0 and 10
from group 1, I want that in the final tree a maximum of 9 and 1
observations out of group 0 and 1, respectively,
2011 May 12
1
Saving misclassified records into dataframe within a loop
Greetings R world,
I know some version of the this question has been asked before, but i need
to save the output of a loop into a data frame to eventually be written to a
postgres data base with dbWriteTable. Some background. I have developed
classifications models to help identify problem accounts. The logic is this,
if the model classifies the record as including variable X and it turns out
2007 Apr 18
1
undefined symbol: Rf_rownamesgets
I get the error
undefined symbol: Rf_rownamesgets
when I try to load my package, which include C++ code that calls that
function. This is particularly strange since the code also calls
Rf_classgets, and it loaded OK with just that.
Can anyone tell me what's going on?
For the record, I worked around this with the general purpose
attribute setting commands and R_RowNamesSymbol. I
2010 Jan 26
1
stable, testing, and backports
The cran2deb archives target testing.
I just pulled a package from them onto a stable system; the library
loaded but said
> library(akima)
Warning message:
package 'akima' was built under R version 2.10.0
Are this and other packages likely to work correctly with different R's
(2.7 in the case of stable)?
How well are they likely to work with a backported R? The R version
would
2004 Sep 06
2
Bug#270019: serial/lp rules for logcheck
At the moment I've no host with which to test ppp/lp things on. If you (or
anyone) could provide complete regexes, (each beginning with ^ and ending with
$) I will patch the rules accordingly.
If not, sending the full log lines is a good start.
Thanks!
--
[ Todd J. Troxell ,''`.
Student, Debian GNU/Linux Developer, SysAdmin, Geek :
2006 Sep 27
1
MSM modeling and transition rates in R
Greetings,
I'm using MSM (mutli-state markov modeling) package to study the
progression of fibrosis in U.S hepatitis C population. I find this is a
very fascinating tool for an applied researcher like myself.
I have a four stage progression only model without any absorbing stage,
also assuming no misclassification error in the data for the time being.
I also have a couple covariates in the
2010 Jan 13
1
Rd output garbled in some circumstances
I'm having trouble getting correct help output in some circumstances for
a package I've created. Though this is not an issue with the current R,
I would like my package to work with previous ones as well.
I'm looking for suggestions about how I could rework my .Rd file so that
it will work with prior R's. In particular, R 2.7 is in the latest
stable release of Debian, so I'd
2004 Aug 20
1
R CMD check testing environment
I can't tell from the docs ("Writing R Extensions" 1.9.1) exactly what
environment the tests, examples, and vignettes that R CMD check tries to
run are in.
In particular:
1) how do I get the package loaded?
2) how do I access data in the data/ directory?
3) where is the material in the other directories? (e.g., has inst/
material been installed? where?)
Apparently (section 1.3)
2009 Aug 25
0
comparing tables from replicated data
Dear friends, I'm examining the characteristics of two models that both
fit the sodium concentration in 16 pigs quite well under treatment or
control conditions. The more complicated model is by anova better than
the less complicated model. To take it further I have generated
replicate data using the independent variables and parameter estimates
under the two models. A clinically
2010 Jan 21
1
Rgeneric.py assists in rearranging generic function definitions
I've attached a script I wrote that pulls all the setGeneric definitions
out of a set of R files and puts them in a separate file, default
allGenerics.R. I thought it might help others who find themselves in a
similar situation.
The "situation" was that I had to change the order in which files in my
package were parsed; the scheme in which the generic definition is in
the
2011 Apr 19
2
Markov transition matrices , missing transitions for certain years
Hi all,
I am working for nest box occupancy data for birds and would like to
construct a Markov transition matrix, to derive transition probabilities for
ALL years of the study (not separate sets of transition probabilities for
each time step). The actual dataset I'm working with is 125 boxes over 14
years that can be occupied by 7 different species, though I have provided a
slimmed down
2011 Mar 15
2
(R) transitions in a Markov Chain
Dear experts,
I have to generate 1000 transitions of a discrete time Markov Chain and
then give and estimation of the equilibrium distribution.
I know the transition matrix.
0.3 0.7 0
0.2 0.5 0.3
0 0.4 0.6
Do you know how to do it with R?
Thanks a lot!
Estefania
[[alternative HTML version deleted]]
2011 Sep 02
2
misclassification rate
Hi users
I'm student who is struggling with basic R programming. Would you please
help me with this problem.
"My english is bad" I hope that my question is clear:
I have a matrix in wich there are two colmns( yp, yt)
Yp: predicted values from my model.
yt: true values ( my dependante variable y is a categorical;3 modalities
(0,1,2)
I don't know how to procede to calculate the
2007 Oct 29
1
Bug#448510: logcheck-database: revised pattern for spamd
Package: logcheck-database
Version: 1.2.63
Severity: normal
Tags: patch
spamassassin is now reporting Unix domain sockets in the rport field.
I'm not exactly sure what changed to cause this to happen; it started
after an upgrade whose only remotely relevant package was razor.
I think the following pattern in ignore.d.server/spamd will work
^\w{3} [ :0-9]{11} [._[:alnum:]-]+
2007 Jun 16
0
Function for misclassification rate/type I,II error??
HI
Is there any function in R that tells us error rate(misclassification rate)
for logistic regression type classification?
i also want to know the function to determine type I and type II error.
I have found a link where "misclass" and "confusion" are used. But I dont
know the package name.
http://alumni.media.mit.edu/~tpminka/courses/36-350.2001/lectures/day32/
2008 Feb 24
1
what missed ----- CART
Hi all,
Can anyone who is familar with CART tell me what I missed in my tree code?
library (MASS)
myfit <- tree (y ~ x1 + x2 + x3 + x4 )
# tree.screens () # useless
plot(myfit); text (myfit, all= TRUE, cex=0.5, pretty=0)
# tile.tree (myfit, fgl$type) # useless
# close.screen (all= TRUE) # useless
My current tree plot resulted from above code shows as:
2011 Oct 25
2
Logistic Regression - Variable Selection Methods With Prediction
Hello,
I am pretty new to R, I have always used SAS and SAS products. My
target variable is binary ('Y' and 'N') and i have about 14 predictor
variables. My goal is to compare different variable selection methods
like Forward, Backward, All possible subsests. I am using
misclassification rate to pick the winner method.
This is what i have as of now,
Reg <- glm (Graduation ~.,
2005 Oct 14
1
Predicting classification error from rpart
Hi,
I think I'm missing something very obvious, but I am missing it, so I
would be very grateful for help. I'm using rpart to analyse data on
skull base morphology, essentially predicting sex from one or several
skull base measurements. The sex of the people whose skulls are being
studied is known, and lives as a factor (M,F) in the data. I want to
get back predictions of gender, and
2012 Aug 19
1
e1071 - tuning is not giving the best within the range
Hi everybody,
I am new in e1071 and with SVMs. I am trying to understand the performance
of SVMs but I face with a situation that I thought as not meaningful.
I added the R code for you to see what I have done.
/set.seed(1234)
data <- data.frame( rbind(matrix(rnorm(1500, mean = 10, sd = 5),ncol = 10),
matrix(rnorm(1500, mean = 5, sd = 5),ncol = 10)))
class <- as.factor(rep(1:2,