search for: disease

Displaying 20 results from an estimated 148 matches for "disease".

2008 Oct 13
25
Fw: Logistic regresion - Interpreting (SENS) and (SPEC)
Dear Mr Peter Dalgaard and Mr Dieter Menne, I sincerely thank you for helping me out with my problem. The thing is taht I already have calculated SENS = Gg / (Gg + Bg) = 89.97% and SPEC = Bb / (Bb + Gb) = 74.38%. Now I have values of SENS and SPEC, which are absolute in nature. My question was how do I interpret these absolue values. How does these values help me to find out wheher my
2009 Jul 09
2
datadist() in Design library
Hi I got an error message using datadist() from Design package: > library(Design,T) > dd <- datadist(beta.final) > options(datadist="dd") > lrm(Disease ~ gsct+apcct+rarct, x=TRUE, y=TRUE) Error in eval(expr, envir, enclos) : object "Disease" not found All variables inclduing response variable "Disease" are in the data frame "beta.final", why then "Disease" can not be found? I thought with datadist(), all va...
2017 Jul 05
1
Question about correlation
Hi Chin Yi, If you are trying to correlate "Health" with "Disease", i.e. cydf<-read.table(text="OTU ID Health Disease Bacterial 1 0.29 0.34 Bacterial 2 0.25 0.07 Bacterial 3 0.06 0.06 Bacterial 4 0.07 0.09 Bacterial 5 0.02 0.05", header=TRUE) print(cor(cydf$Health,cydf$Disease)) [1] 0.7103517 If you are getting that error, it proba...
2009 Jan 30
5
paste together object names to pass it on to a function
...lists/dataframes, which I want to specify with a name vector and paste together the object name and pass it on to a function. Here an (hopefully) instructive example #Data Example gnuff<-list() gnuff$IHD$LE<-66 gnuff$LUNG$LE <-55 #This is the list, where I collect data for different diseases at the second level of the list #Now I want to do calcualtions just for these two diseases and the sub-list "LE" within these diseases nam <- c("LUNG","IHD") for(i in 1:2) x[i] <- paste("gnuff",nam[i],"LE",sep="$") /2 x #So...
2010 Sep 16
2
Survival Analysis Daily Time-Varying Covariate but Event Time Unknown
Help! I am unsure if I can analyze data from the following experiment. Fish were placed in a tank at (t=0) Measurements of Carbon Dioxide were taken each day for 120 days (t=0,...120) A few fish were then randomly pulled out of the tank at different days, killed and examined for the presence of a disease T= time of examination in days from start (i.e. 85th day), E = 0/1 for nonevent/event My problem has been linking all the Carbon Dioxide measurements up to the day of examination and trying to create a survival object. I have considered interval censoring with right censored for fish with...
2017 Jul 05
1
Question about correlation
On 2017-07-05 11:56, Jim Lemon wrote: > Hi Chin Yi, > If you are trying to correlate "Health" with "Disease", i.e. > > cydf<-read.table(text="OTU ID Health Disease > Bacterial 1 0.29 0.34 > Bacterial 2 0.25 0.07 > Bacterial 3 0.06 0.06 > Bacterial 4 0.07 0.09 > Bacterial 5 0.02 0.05", > header=TRUE) > print(cor(cydf$Health,cydf$Disease)) &gt...
2013 Aug 28
1
can you please give guidance for generating future prediction values from existing heart disease data
Hi can you please give guidance for generating future prediction values from existing heart disease data and we want to know the which type of models are using for generating the future prediction. can you please tell me how can i write the formula for future predictive values. can you see the following attachment and send me solution for that problem..... -- Thanks and Regards, Bala Chan...
2017 Jul 05
1
Question about correlation
Greeting. Dear Mr/Mrs/Miss, OTU ID Health Disease Bacterial 1 0.29 0.34 Bacterial 2 0.25 0.07 Bacterial 3 0.06 0.06 Bacterial 4 0.07 0.09 Bacterial 5 0.02 0.05 Above show the first 6 data sets, may I ask that the reason of R show the error like "Error in cor(data) : 'x' must be numeric" ? And how to solve it? Besides, isn't t...
2010 Sep 15
6
Sas to R
...from Sas. I have tried using the following code in Sas using the x command but it just calls up dos and says ''D:\Program'' is not recognized as an internal or external command, operable program or batch file. ] SAS CODE: options xwait xsync; %let Rsource=S:\EPI_Data\Communicable Diseases\DR1355 Historic Communicable Disease Analaysis\R graphics; options xwait xsync; x ''"D:\Program Files\R\R-2.9.2\bin\Rgui.exe" --no-save --quiet <""&rsource.\Rtest.R""> ""&rsource.\Rtest.log""''; What I need it to do...
2017 Jul 05
1
Question about correlation
...n is right, I didn't take "cor(data)" literally. Jim On Thu, Jul 6, 2017 at 3:38 AM, G?ran Brostr?m <goran.brostrom at umu.se> wrote: > On 2017-07-05 11:56, Jim Lemon wrote: >> >> Hi Chin Yi, >> If you are trying to correlate "Health" with "Disease", i.e. >> >> cydf<-read.table(text="OTU ID Health Disease >> Bacterial 1 0.29 0.34 >> Bacterial 2 0.25 0.07 >> Bacterial 3 0.06 0.06 >> Bacterial 4 0.07 0.09 >> Bacterial 5 0.02 0.05", >> header=TRUE) >> print...
2017 Jul 06
0
Question about correlation
...an > On Thu, Jul 6, 2017 at 1:38 AM, G?ran Brostr?m <goran.brostrom at umu.se > <mailto:goran.brostrom at umu.se>> wrote: > > On 2017-07-05 11:56, Jim Lemon wrote: > > Hi Chin Yi, > If you are trying to correlate "Health" with "Disease", i.e. > > cydf<-read.table(text="OTU ID Health Disease > Bacterial 1 0.29 0.34 > Bacterial 2 0.25 0.07 > Bacterial 3 0.06 0.06 > Bacterial 4 0.07 0.09 > Bacterial 5 0.02 0.05", >...
2008 Aug 22
2
Help on competing risk package cmprsk with time dependent covariate
Dear R users, I d like to assess the effect of "treatment" covariate on a disease relapse risk with the package cmprsk. However, the effect of this covariate on survival is time-dependent (assessed with cox.zph): no significant effect during the first year of follow-up, then after 1 year a favorable effect is observed on survival (step function might be the correct way to say t...
2006 Apr 08
1
Welcome to Your WebMD Health Newsletters
...ent WebMD features that just may affect you. See the latest in our News Center. Features -- http://aolsvc.health.webmd.aol.com/living_better/default.htm Newscenter -- http://aolsvc.health.webmd.aol.com/home/default.htm Use our in-depth information to learn about a disease or condition that matters to you. Start with our Diseases, Conditions, and Health Topics table of contents or our Site Map. Disease and Condition Center -- http://aolsvc.health.webmd.aol.com/condition_centers/default.htm Site Map -- http://aolsvc.health.webmd.aol.com/s...
2007 Apr 17
4
Extracting approximate Wald test (Chisq) from coxph(..frailty)
...extract the approximate Wald test for the frailty (in the following example 17.89 value)? What about the P-values, other Chisq, DF, se(coef) and se2? How can they be extracted? ######################################################> kfitm1 Call: coxph(formula = Surv(time, status) ~ age + sex + disease + frailty(id, dist = "gauss"), data = kidney) coef se(coef) age 0.00489 0.0150 sex -1.69703 0.4609 diseaseGN 0.17980 0.5447 diseaseAN 0.39283 0.5447 diseasePKD...
2008 Feb 27
7
Cross Validation
Hello, How can I do a cross validation in R? Thank You!
2008 Sep 16
3
Hosmer- Lemeshow test
...on the Credit scorecard model. I am using the Logistic regression to arrive at the regression coefficients model. I want to use the Hosmer - Lemeshow test . In order to understand the use of R - language, I had referred the following URL       http://www.stat.sc.edu/~hitchcock/diseaseoutbreakRexample704.txt The related data ''diseaseoutbreak'' is available at the following URL        http://www.stat.sc.edu/~hitchcock/diseaseoutbreakdata.txt The R code as mentioned therein is #### # A function to do the Hosmer-Lemeshow test in R. # R Function i...
2010 Jun 07
2
Desolve package: How to pass thousand of parameters to C compiled code?
Hi, I have used DeSolve package for my ODE problem regarding infectious disease transmission and currently am trying to pass lots (roughly a thousand) of model parameters to the C compiled model (I have to use C compiled code instead of R code purely because of the speed). I can''t go define it one by one as it gonna take ages to finish and also quite difficult to rev...
2012 Jan 17
6
net classification improvement?
Greetings, I have generated several ROC curves and would like to compare the AUCs. The data are cross sectional and the outcomes are binary. I am testing which of several models provide the best discrimination. Would it be most appropriate to report AUC with 95% CI''s? I have been looking in to the "net reclassification improvement" (see below for reference) but thus far I can
2010 Apr 19
2
Error message GSA package
Dear list, I have gene expression measurements obtained by PCR on 11 genes, tabulated as a data matrix. I''m attempting to use GSA package to distinguish any significant changes in these genes as a pathway. My response variable is binary, 0=no disease, 1=disease. I have read the PCR data into R as follows: data <- read.delim("CD4PCR.txt",header=TRUE,row.names=1,sep="\t",dec=".",fill=TR UE) x<-as.matrix(data) dim(x) (11,37) =11 genes =37 samples (20 no disease, 17 disease) this code: set.seed(100...
2010 Oct 18
6
R 2.12.0 for Windows: error when loading (some) packages
...-2.12.0/library" I had to reinstall them from CRAN. -- Renaud Lancelot EDEN Project, coordinator http://www.eden-fp6project.net/ UMR CIRAD-INRA "Contr?le des maladies animales exotiques et ?mergentes" Joint research unit "Control of emerging and exotic animal diseases" CIRAD, Campus International de Baillarguet TA A-DIR / B F34398 Montpellier http://umr-cmaee.cirad.fr/ Tel.? +33 4 67 59 37 17? -? Fax? +33 4 67 59 37 95 Secr. +33 4 67 59 37 37? - Cell. +33 6 77 52 08 69