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Hello sir: As to the 2*2 table format for reporting results comparing a new test to true diagnosis,when I got the sensitivity and specificity,how can I calculate the exact 95% confidence intervals (based on the binomial distribution) for sensitivity and specificity via R? Thanks a lot! My best! ------------------------------ ******************************************* Xin Meng Capitalbio

Hello sir: How can I perform McNemar (paired chi square test) by using R? Thanks! ------------------------------ ******************************************* Xin Meng Capitalbio Corporation National Engineering Research Center for Beijing Biochip Technology BioPharma-informatics & Software Dept. Research Engineer Tel: +86-10-80715888/80726868-6438 Fax: +86-10-80726790 Email??xmeng

Hello sir: There are 2 questions about string. 1 How to calculate the width of a string? e.g string "abc"'s width is 3; 2 How can I get the "substring" in such kind of condition: "f:\\JPCS_signal.txt" "f:\\PC1_signal.txt" "f:\\PC2_signal.txt" What I wanna get is "JPCS" "PC1" "PC2".How can I achieve them by R

Hi all: I wanna know how to expoort ".xls" file. And in the exported ".xls" file, how to set different cells with different color? Thanks a lot! My best. ------------------------------ ******************************************* Xin Meng Capitalbio Corporation National Engineering Research Center for Beijing Biochip Technology BioPharma-informatics & Software

Hello sir: group1:1,2,3,4 group2:1,3,4,5 group3:2,4,8,9 .. ... group1000:9,3,8,2 I wanna get the "intersection set" and "union set". I've tried command "setdiff"and "union",but only two groups is permited.How can I deal with multi groups to find the "intersection set" and "union set"? Thanks a lot! My best

Hello sir: I use Rcmd to execute R code,such as : "C:\\Program Files\\R\\R-2.2.1\\bin\\Rcmd.exe" BATCH globalLowessRun.r globalLowessRun.r is a R function written by myself. But I wanna make the "globalLowessRun.r" changeable,such as globalLinearRun.r or gridbasedLowessRun.r,and so on. How can I achieve this goal via Rcmd.exe BATCH ? The only finding is: Rcmd BATCH

Hello sir: How can I read data file of EXCEL format from disk("d:\\data.XLS" for example)? I can only read data file of .txt format read.delim("d:\\data.txt",header=T,as.is=T),but only EXCEL format is available at present. Thanks a lot

Hello sir: Here's the result of repeated measures ANOVA. $"Error: Within" Df Sum Sq Mean Sq F value Pr(>F) t 2 524177 262089 258.24 1.514e-06 *** Residuals 6 6089 1015 --- Signif. codes: 0 `***' 0.001 `**' 0.01 `*' 0.05 `.' 0.1 ` ' 1 My question is: How to extract the F value only? If the result is a

Hello sir: Here's a question: x<-1:5 y<-c(2,1,4) I wanna get the different elements between x & y,i.e. 3,5. How can I get the result(3,5) via R function? Thanks a lot for your help. My best! ------------------------------ ******************************************* Xin Meng Capitalbio Corporation National Engineering Research Center for Beijing Biochip Technology

Hello sir: Here's a question on covariance analysis which needs your help. There're 3 experiments,and x refers to control while y refers to experimental result. The purpose is to compare the "y" values across the 3 experiments. experiment_1: x:0.1 0.2 0.3 0.4 0.5 y:0.5 0.6 0.6 0.7 0.9 experiment_2: x:1 2 3 4 5 y:3 4 6.5 7.5 11 experiment_3: x:10 20 30 40 50 y:18 35 75 90

As to the function"pnorm",the default degree of freedom(df) is infinite. I wanna know how to set the df as I want. Help on pnorm doesn't have df setting.The only choice are:"mean, sd, lower.tail, log.p",but no df. For instance: sample size=6 df=6-1=5 t value=9.143 I wanna to the corresponding p value by using function "pnorm". How can I do it? Thanks a lot

Hello,sir: Here's a little question about R which needs your help.Thanks in advance. If I wanna make a sequence just like a,b,c,d (In other words,a vector consists of 4 characters :a,b,c,d ).How can I do it in a shortcut manner? Yes,I can do it as following: c("a","b","c","d") and the result is:[1] "a" "b" "c"

Hi all: As to hcluster,how can I control the cluster is performed according to rows(genes for instance) or columns(samples for instance)? I can't find the parameters for it. Thanks a lot! My best!

hi all: If there's a dataframe: x y 1 a 2 b 3 c The info of the data such as : name date author The result I want is: name date author x y 1 a 2 b 3 c In other words,I wanna add the info above the dataframe. How can I do it ? Thanks a lot! My best

Hello sir: a data with 2 columns: id x a 1 b 2 c 3 I wanna get such kind of plot: x: a b c y:1 2 3 But the plot command doesn't permit string character as x. How can I get it ? Thanks a lot ! My best

Hi I'm using R 2.0 in SuSE 9.2. When I plot data as a boxplot, the boxes appear on the plot in alphabetical order (of group) rather than the order in which they appear in the data. So far, the only thing I can do to fix this is to prefix the group labels with a,b,c...etc to trick R into plotting them in the right order. Can sorting be turned off? How should I address this sensibly? Thanks

An NA in the rownames of a matrix (or dataframe) causes misalignment when the matrix is printed: R> x <- matrix(1:12, 3,4, dimnames=list(letters[1:3], LETTERS[1:4])) R> rownames(x)[2] <- NA R> x A B C D a 1 4 7 10 <NA> 2 5 8 11 c 3 6 9 12 The bug is in function Rstrlen, in src/main/printutils.c. MatrixRowLabel and MatrixColumnLabel (same file) rely on Rstrlen

Easy question that I can't find an answer for. I'm trying to subset a data frame and want to exclude the positive values, i.e. I want the NA values. My data: > summary(temp$tuna) Min. 1st Qu. Median Mean 3rd Qu. Max. NA's 1 2 3 3 4 5 1211 Querying for subset(temp, tuna %in% "NA", select.... subset(temp, tuna == NA,

Hi, I'm sorry to send email to everyone on this list, but I have a simple question which is bothering me and I can't seem to figure out the correct answer. I just downloaded R and I'm trying to reproduce some simple analysis I've done on other packages. In particular, if I have a vector of experimental values and a vector of their uncertainties, is there a way to plot the

On Thu, 18 Nov 2004 00:38:47 +0000 (UTC), Gabor Grothendieck <ggrothendieck@myway.com> wrote : >DIFFERENCE BETWEEN USING .RBUILDIGNORE AND NOT > >The reason that the processing is different according to whether one >uses .Rbuildignore or not is that > R CMD build >takes the .Rbuildignore file into account but > R CMD install > R CMD check > R CMD build