similar to: R 中国BBS论坛 （R China Forum）

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

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

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.

A colleague from China is visiting our lab is working with us on some R-based remote sensing projects, and he was curious if there is a r-help listserv in Chinese and, if not, if it would be possible to set one up? I didn't see one listed on the Mailing List page on the cran-r website. Thanks! --j

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

ÈÈÃŵÄѧ¿Æ ȨÍþµÄ»ú¹¹ Ò»Á÷µÄר¼Ò ×îеÄÄÚÈÝ Áé»îµÄÊÚ¿Î »ªÖпƼ¼´óѧ½¯ÊÏ»ù½ð¹¤ÒµÅàѵÖÐÐÄ ±±¾©ÏÖ´ú׿Խ¹ÜÀí¼¼Êõ½»Á÷ÖÐÐÄ ÔÚÖ°ÈËÔ±ÏîÄ¿¹ÜÀíÑо¿Éú¿Î³Ì½øÐÞ°à ÕÐ Éú ¼ò Õ һ¡¢ÏîÄ¿¹ÜÀíÑо¿Éú¿Î³Ì½øÐÞ°àµÄ¿ªÉè±³¾°

µÚÎå½ì±±¾©¡°¹ú¼ÊÖÜ¡±³ÏÑûÄúµÄ(¹«Ë¾¡¢ÆóÒµ)²Î¼Ó -- Öйú±±¾©¹ú¼Ê¿Æ¼¼²©ÀÀ»áôßÖйú±±¾©¸ßм¼Êõ²úÒµ¹ú¼ÊÖÜ ¡°ÊÀ½ç500Ç¿CEOÓëÖйú¶¥¼¶ÆóÒµÊ×ÄÔÂÛ̳¡± »áÒé˵Ã÷£º ¾­ÖлªÈËÃñ¹²ºÍ¹ú¹úÎñÔºÅú×¼£¬ ÖлªÈËÃñ¹²ºÍ¹ú¿Æѧ¼¼Êõ²¿¡¢Í⾭󲿡¢½ÌÓý²¿¡¢ÐÅÏ¢²úÒµ²¿¡¢Öйú¹ú¼ÊóÒ×´Ù½øίԱ»á¡¢¹ú¼Ò֪ʶ²úȨ¾ÖºÍ±±¾©ÊÐÈËÃñÕþ¸®¹²Í¬Ö÷°ì£¬ ±±¾©ÊÐó´Ù»á³Ð°ìµÄ¡ª¡ªµÚÎå½ìÖйú±±¾©¸ßм¼Êõ²úÒµ¹ú¼ÊÖÜ(ÒÔϼò³Æ¿Æ²©»á(¹ú¼ÊÖÜ)£¬

µÚÎå½ì±±¾©¡°¹ú¼ÊÖÜ¡±³ÏÑûÄúµÄ(¹«Ë¾¡¢ÆóÒµ)²Î¼Ó -- Öйú±±¾©¹ú¼Ê¿Æ¼¼²©ÀÀ»áôßÖйú±±¾©¸ßм¼Êõ²úÒµ¹ú¼ÊÖÜ ¡°ÊÀ½ç500Ç¿CEOÓëÖйú¶¥¼¶ÆóÒµÊ×ÄÔÂÛ̳¡± »áÒé˵Ã÷£º ¾­ÖлªÈËÃñ¹²ºÍ¹ú¹úÎñÔºÅú×¼£¬ ÖлªÈËÃñ¹²ºÍ¹ú¿Æѧ¼¼Êõ²¿¡¢Í⾭󲿡¢½ÌÓý²¿¡¢ÐÅÏ¢²úÒµ²¿¡¢Öйú¹ú¼ÊóÒ×´Ù½øίԱ»á¡¢¹ú¼Ò֪ʶ²úȨ¾ÖºÍ±±¾©ÊÐÈËÃñÕþ¸®¹²Í¬Ö÷°ì£¬ ±±¾©ÊÐó´Ù»á³Ð°ìµÄ¡ª¡ªµÚÎå½ìÖйú±±¾©¸ßм¼Êõ²úÒµ¹ú¼ÊÖÜ(ÒÔϼò³Æ¿Æ²©»á(¹ú¼ÊÖÜ)£¬

Hey, everyone, I am using proportional odds model for ordinal responses in dose-response experiments. For some samll data, SAS can successfully provide estimators of the parameters, but the built-in function polr() in R fails. Would 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

I''m at a point where I''d like to start adding search capability to my app, so I thought I''d ask: Anyone have any recommendations for a good Rails search library/plugin/etc? There seem to be quite a few different ones out there, but I don''t have much context on any of them. What is the difference between using Ferret, or a SearchGenerator, SimpleSearch,

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

Dear R help I have been trying to conduct a chi square test on two groups of variables to test whether there is any relationship between the two sets of variables chisq.test(oxygen, train) Pearson's Chi-squared test data: oxygen X-squared = 26.6576, df = 128, p-value = 1 > chisq.test(oxygen) Pearson's Chi-squared test data: oxygen X-squared = 26.6576, df = 128,

Hi, I would like to know the similarity between variables, but I don't exactly how begin and as from what dataframe or matrix! I have a matrix where in row I have 'Good', 'Medium','Bad' and in columns I have my Criterions ! What function and package should I use? Thanks a lot Sabine --------------------------------- ils, photos et vidéos ! [[alternative

# CASE 1 # The following plots a single cell or block for all three location 0,1,2. y <- rep(2,8) hist(y) # why is this a single block? hist(y,xlim=c(0,2)) # same thing hist(y,breaks=2) # same # CASE 2 # adding a different value, plots as expected y <- append(y,0) hist(y) # plots as expected In most cases of the data I have variances in the data so

Hello anyone used to do similar things: search for the final C function that corresponding to the drawing of a rectangle? As listed in the subject, I started from heatmap() in R and after several steps reached the GRect() in C. However, then it refers to rect() which further seems to refer to do_rect(), and then, surpringly, do_rect refers to GRect()!!! A dependency circle! How can it work if no

Dear all, I search the mail list about this topic and learn that no simple way is available to get "lsmeans" in R as in SAS. Dr.John Fox and Dr.Frank E Harrell have given very useful information about "lsmeans" topic. Dr. Frank E Harrell suggests not to think about lsmeans, just to think about what predicted values wanted and to use the predict

Dear all, 1)how can I easily get p value for the coefficients of factors in a multinomial model? 2)why the p values for "type III" test with Anova are not identical to that from SAS? for example: A,B and C are categorical variables,but the proportions of each level in each categorical variables are not balance. Y is a nominal variables(>=3 categories); To do