search for: epi

Displaying 20 results from an estimated 184 matches for "epi".

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2010 Aug 31
2
R and Epi Info
Hello, I was wondering who to contact to see about somehow interconnecting or integrating the programs R and Epi Info. I have been involved in the development of Epi Info which is a software program developed by the Centers for Disease Control and Prevention (CDC) in Atlanta (www.cdc.gov/epiinfo<http://www.cdc.gov/epiinfo>). Epi Info allows for creating data entry systems and performs certain epidemio...
2017 Jun 24
2
Orden de categorías en gráficos de barras (position = "stack")
?? Hola. Estoy intentando ordenar el gráfico tal que las columnas se apilen en el siguiente orden: debajo, los EPI; los SemiEPI en el medio y los NoEpi arriba de todo. Estos son mis datos: > tabla.barras Rangos Clase Asistentes 1 De 45d EPI 405 2 De 1a EPI 812 3 De 2a EPI 1639 4 De 3a EPI 2202 5 De 4a EPI 1994 6 De 5a EPI 255 7 D...
2017 Jun 25
3
Orden de categorías en gráficos de barras (position = "stack")
Hola, Mira la versión de ggplot2 que estás usando por tenerla actualizada a la última... A mi me funciona introduciendo algún cambio salvo la última línea cuando cambias el tema... #----------- Lines <- " id Rangos Clase Asistentes 1 45d EPI 405 2 1a EPI 812 3 2a EPI 1639 4 3a EPI 2202 5 4a EPI 1994 6 5a EPI 255 7 45d SemiEPI 614 8 1a SemiEPI 881 9 2a SemiEPI 2174 10 3a SemiEPI 3254 11 4a SemiEPI 2934 12 5a SemiEPI...
2005 Dec 15
3
Name conflict between Epi and ROC packages
The name conflicts in Epi and ROC packages (2 'ROC' functions are the problem) cause the following code to work once, but not twice: library(MASS); data(cats); x = cats[,2] y = ifelse(cats[,1]=='F',0,1) library(Epi); ROC(x,y,grid=0)$AUC library(ROC); AUC(rocdemo.sca(y, x, dxrule.sca)) What i...
2012 Jul 26
1
optimal cut off with Epi package
Dear all, I would like to calculate the optimal cut off (threshold) of a test using the Epi package. Here I am presenting some data based on the output of two tests. I am interested in identifying the optimal cut off an its 95% CI. Running the ROC() function with the Epi package I obtain a nice picture that returns what I interpret as the optimal cut off with lr.eta=0.431. would be this...
2011 May 17
1
epi.2by2
This is a really simple question, I'm sure,but I can't make EpiR work! I keep getting the following: > epi.2by2(47, 263483, 282, 935028, method="cohort.time", conf.level=0.95) Error in epi.2by2(47, 263483, 282, 935028, method = "cohort.time", conf.level = 0.95) : unused argument(s) (935028) and I really don't know why!. Any ide...
2007 Oct 30
1
Epi Info
Hello: Does anybody knows if Epi Info, from CDC (www.cdc.gov/epiinfo) runs on Wine? I did try AppDB first but there are no entries for Epi Info. Epi Info is a data base for epidemiology and public-heath developed by Centers for Disease Control and Prevention (USA) and heavilly used in the world. It is based on Access 97 or 2000...
1999 Nov 24
0
problem with multiple figure postscript file
...r linux. Here are the commands I have been using: postscript("crocheinterp.ps", family="Times", height=7, width=4, horizontal=FALSE, paper="letter") par(mfcol=c(2,2)) par(mfg=c(1,1,2,2)) par(mai=c(0.5, 0.5, 0.5, 0.5)) plot(croche.day.epi.grid$xy, type="n", xlim=c(0,100), ylim=c(0,200), xlab="", ylab="") image(croche.day.epi.grid$x, croche.day.epi.grid$y, matrix(croche.day.epi.grid$krige$zhat, length(croche.day.epi.grid$x), length(croche.day.epi.grid$y)), add=T, col=grays)...
2005 Feb 11
1
how ot get covariance matrix from survreg
...matrix of the coefficients. I know how to get corr from survreg, say, summary(f,corr=T), but how to get covariance matrix of the coefficient ? can I put them in a matrix and output ? thanks below is what I did <mailto:r-help@stat.math.ethz.ch> n=100; beta=1.0 z=runif(n) u=runif(n) epi=log(u/(1-u)) d=rep(1,n) t=z*beta+epi f<-survreg(Surv(t,d)~z+epi, dist="logistic") summary(f, corr=T) below is the result > summary(f, corr=T) ....... ........ Correlation of Coefficients: (Intercept) z epi z -0.882 epi 0.16...
2005 Jun 19
0
Epi package
There is now an Epi-package on CRAN. It is intended for epidemiological analysis in R. It has its own homepage, http://www.pubhealth.ku.dk/~bxc/Epi The package has been used at the course "Statistical practise in Epidemiology with R", see http://www.pubhealth.ku.dk/~bxc/SPE. A mailing list for people usi...
2005 Jun 19
0
Epi package
There is now an Epi-package on CRAN. It is intended for epidemiological analysis in R. It has its own homepage, http://www.pubhealth.ku.dk/~bxc/Epi The package has been used at the course "Statistical practise in Epidemiology with R", see http://www.pubhealth.ku.dk/~bxc/SPE. A mailing list for people usi...
2012 Aug 01
0
Optimal cut off with ROC (Epi package)
Dear all, I would like to calculate the optimal cut off (threshold) of a test using the Epi package. Here I am presenting some data based on the output of two tests. I am interested in identifying the optimal cut off and its 95% CI. Running the ROC() function with the Epi package I obtain a nice picture that returns what I interpret as the optimal cut off with lr.eta=0.491. would be thi...
2005 Aug 09
1
Adding Functionality to stat.table in Epi
The stat.table function in the Epi package won't do standard deviations. It didn't seem that it would be difficult to add an "sd" function to the stat.table function. Following the example for the mean, I set up a similar function for the sd (and included it as an options) but it just won't work. (I tried sendi...
2011 Apr 13
2
setting pairwise comparisons of columns
...with 3 genes, there are 3 comparisons, 4 genes=6 comparisons) in a new data.frame or matrix so that I can then test each pair with a chi-square test in a loop. Below is some sample data of the form I will be using. > lets<-c("ab","ac","bc","bd") > epi<-data.frame(cbind("M1"= c(sample(lets,10, replace=TRUE)),"M2"=c(sample(lets,10,replace=TRUE)), "M3"=c(sample(lets,10, replace=TRUE)))) > print(epi) M1 M2 M3 1 ac bc bd 2 ac ac bd 3 bd bd bd 4 ab ac bd 5 ac bc bd 6 bd bd bc 7 ab ac ab 8 bc bd ab 9 bd a...
2008 Jan 17
0
New version of Epi package out (1.0.7)
A new major upgrade of the Epi package for Epidemiological data analysis has been put on CRAN, it is now at version 1.0.7. It contains an entirely new way of representing follow-up data on multiple timescales and multiple states. See the function Lexis(). Plus a lot of other useful stuff for epidemiological analysis. See more...
2018 May 23
1
CKD-Epi formula
Hi all, I have a question and I do not know If I am at the right place to ask this question. But is there someone that has the formula of CKD-Epi in code in R? I have tried a lot of loops, but none of the approaches give me the right answer. Is there someone who has this formula coded? Thank you! [[alternative HTML version deleted]]
2012 Aug 31
2
test Breslow-Day for svytable??
Hi all, I want to know how to perform the test Breslow-Day test for homogeneity of odds ratios (OR) stratified for svytable. This test is obtained with the following code: epi.2by2 (dat = daty, method = "case.control" conf.level = 0.95, units = 100, homogeneity = "breslow.day", verbose = TRUE) where "daty" is the object type table svytable consider it, but when I run the code does not throw the homogeneity test. Thanks....
2016 Nov 17
2
problem with normalizePath()
...haven" (and possibly others) no longer access files on shared network drives. The problem appears to be in the normalizePath() function. The file can be read from a local drive or by functions that don't call normalizePath(). The error thrown is Error: path[1]="\\Hzndhhsvf2/data/OCPH/EPI/BHSDM/Group/17.xls": The system cannot find the file specified Here's my session: library(readxl) library(XLConnect) # attempting to read file from network drive df1 <- read_excel("//Hzndhhsvf2/data/OCPH/EPI/BHSDM/Group/17.xls") # pathname is fully qualified, but error thro...
2011 Jun 20
0
AUC calculated from Epi package
Hi, I have a dataset (see attached) with 2 variables "Y" is binary, "x" is a continuous variable. I want to calculate area under the curve (AUC) for the ROC curve, but I got different AUC values using ROC() from Epi package vs. rcorr.cens() from rms package: test<-read.table("test.txt",sep='\t',header=T,row.names=NULL) y<-test$y x<-test$x library(Epi) ROC(form=y~x,plot="ROC") library(rms) rcorr.cens(x,y) lrm(y~x) As you can see, ROC() gave an AUC 0.782, while both rcorr...
2016 Nov 18
2
problem with normalizePath()
...>> problem appears to be in the normalizePath() >> function. The file can be read from a local drive or by >> functions that don't call normalizePath(). The error >> thrown is >> >> Error: >> path[1]="\\Hzndhhsvf2/data/OCPH/EPI/BHSDM/Group/17.xls": >> The system cannot find the file specified >> >> Here's my session: >> >> library(readxl) library(XLConnect) >> >> # attempting to read file from network drive df1 <- >> read_excel(...