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Hi, every one, I have translated <An Introduction to R > into simplified Chinese and traditional Chinese. You can browse them from these two URL: simplified Chinese: http://www.biosino.org/pages/newhtm/r/schtml/index.html#Top traditional Chinese: http://www.biosino.org/pages/newhtm/r/tchtml/ I have distributed these document in HTML format. That is because there is something wrong with

...d you like to tell me how to make some change so I can use polr() to obtain the estimators? Or anyone can give me a hint about the conditions for the existance of MLE in such a simple case? By the way, for the variable "resp" which must be ordered factor, how can I do it? Thanks a lot. Guohui The following is one example I used both in SAS and R. in R: library(MASS) dose.resp = matrix( c(1,1,1,1,2,2,2,3,3,3, 2,2,3,3,4,4,5,4,5,5), ncol=2) colnames(dose.resp)= c("resp", "dose") dose.resp #> dose.resp # resp dose # [1,] 1 2 # [2,] 1 2 # [3,]...

Dear friends, The user coordiante system in the R graphics is easy to understand as it simply corresponds to the range of values on the axes of the plot. However, sometimes, we want to kown the coordinates of a region in other system, e.g., the normal coordinate system whose origin is the the upper-left cornner of the drawing area which is used to set the hot regions in the HTML image maps.

Dear All, I am not familar with R. I want to use PCA (principal components analysis) and MDS (multidimensional scaling). Can someone tell me which R package I should use for PCA and MDS? I appreciate your help in advance. Ray

Dear All, I have written a function in c (in a file named 'a.c') as follows, void convolve(double *a, int *na, double *b, int *nb, double *ab) { int i, j, nab = *na + *nb - 1; for(i = 0; i < nab; i++) ab[i] = 0.0; for(i = 0; i < *na; i++) for(j = 0; j < *nb; j++) ab[i + j] += a[i] * b[j]; } Then, I created a shared file in the Windows, R CMD SHLIB -d -o

¸÷λºÃ£¬ http://rbbs.biosino.org/Rbbs/ ÏÖÔÚÔÚ²âÊÔ£¬»¶Ó­Òâ¼û¡£ -- ADDRESS: Bioinformatics Center, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences 320 Yueyang Road, Shanghai 200031, P.R.China [[alternative HTML version deleted]]

Dear All, I distributed the HTML style one year ago ( http://www.biosino.org/pages/newhtm/r/schtml and http://www.biosino.org/pages/newhtm/r/tchtml). Now I polished it, and rewrote it with Latex. You can download it from the URL: http://www.biosino.org/R/R-doc/ ( http://www.biosino.org/R/R-doc/files/R-intro_cn.pdf). Wish it will be useful for Chinese R users. Any