similar to: some questions about rattle.

Hi, I am using Rattle 2.6.4 with R 2.12.2 on win64, is this a bug ? Following is the content after execute the associate analysis process: Summary of the Apriori Association Rules: Number of Rules: 23351 Summary of the Measures of Interestingness: support confidence lift Min. :0.1250 Min. :1 Min. :2.667 1st Qu.:0.1250 1st Qu.:1 1st Qu.:2.667 Median :0.1250

Hi Does anybody know how to create ff objects with data reading from stream objects, such as data reading from PostgreSQL database through RPostgreSQL. For this purpose although we can save the data to a csv file through external tools and then read it through csv readers, but it requires one more data read and write operation, which is of high I/O cost for large datasets. Xiaobo.Gu

Hi Dirk I think there are problems with pg_config, the configure script of RPostgreSQL checks for pg_config and got ¡°checking for pg_config... /usr/bin/pg_config¡±. In Solaris 10u7 X64, three versions of PostgreSQL are installed, there are in /usr/postgres/8.2(8.2.9) and /usr/postgres/8.3(8.3.3), the corresponding bin files are in /usr/postgres/<version>/bin and

Hi, After reading the slices from ff project site I know ff can be used with snowfall to achieve parallel processing, I want to know is it the only way, can we combine package foreach and ff, especially in a SMP server, with doMC and multicore behind foreach. Xiaobo.Gu [[alternative HTML version deleted]]

Especially for large ff objects. Xiaobo.Gu [[alternative HTML version deleted]]

Hi, The read.csv.ffdf function in package ff will create the ff object physical file in the default directories, I am trying to let the files created in the paths users specify, I think the point is to make use of the asffdf_args parameter, I have a test CSV file named D:\rtemp\fftest.csv, the content of the file is as following: col1,col2,col3 1,"amber",2.4 2,"linda",4.5

Hi, I am using RpgSQL to retrieve data from a PostgreSQL database wich is with encoding UTF8, and I have some Chinese character in one of the columns, unfortunately R can't show it correctly. > df <- dbGetQuery(con, "select * from test") > df a b 1 1 ????????\xa2 2 2 ???? EURO\xa1 I see the following option, do I need to change the encoding option to show

Hi, I am trying to write a function do cast columns of data frame as factor in a loop, the source is : as.factor.loop <- function(df, cols){ if (!is.null(df) && !is.null(cols) && length(cols) > 0) { for(col in cols) { df[[col]] <- as.factor(df[[col]]) } } } source('D:/ambertuil.r') x <- 1:5 y <- 2:6 df <- data.frame(x=x, y=y)

Hi, Since we can?t access Google Groups here in China, so please forgive me if anyone has asked this question before. Sincerely Xiaobo Gu

Hi, I see the following is the credit scoreing in R guide : m2<-glm(formula = good_bad ~ checking + duration + history+ purpose +amount + savings + employed + installp + marital + coapp +age + other + depends + telephon + foreign +checking:amount What does checking:amount mean? Regards, Xiaobo Gu

A question, please about development of R packages: Are there any guidelines or best practices for deciding when and why to implement an operation in R, vs. implementing it in C? The "Writing R Extensions" recommends "working in interpreted R code . . . this is normally the best option." But we do write C-functions and access them in R - the question is, when/why is this

Hi, Can the plenty of analytical functions provided by base R and contributed packages be called with ff objects as parameters directly, or do we have to write special version of the functions for ff objects? If it is the latter case, is there a list of functions which support ff objects already. Xiaobo.Gu [[alternative HTML version deleted]]

Hi, The Transparency Layer feature of Oracle R Enterprise overcomes the RAM limitation of R, and can take advantage of multiple core processing of the database server by translating R expression into SQL, what about building a open source version of the transparency layer for relational databases? Xiaobo Gu

Hi, I post this message to the general r-help list hoping anyone within a wider range have suggestions: There are three ways to integration R and postgres, especially on 64bit Microsoft windows Platform, 1. via RODBC package, which has 32 bit and 64 bit version for windows 2. via RPostgres interface, which only has 32bit version currently 3. via plr for Greenplum, which only supports a

Hi, I am running the examples in page 70 of the ff package document, but it failed with the following error > cat("let's create some ff objects\n") let's create some ff objects > n <- 8e3 > a <- ff(sample(n, n, TRUE), vmode="integer", length=n, filename="d:/tmp/a.ff") > b <- ff(sample(255, n, TRUE), vmode="ubyte", length=n,

We have tried to build rattle on Solaris 10 X86 platform, and the results are : 1. Package XML and pmml can be built. 2. Package RGtk2 can be built but can’t be installed because the installer can’t find GTK on Solaris, but it seems GTK has been preinstalled on Solaris 10, but I don’t know how to configure it. 3. There are errors when building the cairoDevice package , the error

Windows 7, R 2.15.1 64bit, RStudio 0.97.312, Rattle 2.6.26 Hi, Please help. I removed rattle then reinstalled then loaded then attempted to open rattle with rattle(). But each time I do that My R session in R studio aborts and restarts. remove.packages("rattle") install.packages("rattle") library(rattle) How can I fix this? I saw something in rattle-users but that applied

Version 2.4.0 of Rattle has been released to CRAN. The rattle package (http://rattle.togaware.com) is a multi platform (GNU/Linux, Mac/OSX, MS/Windows) GTK based GUI for data mining (for exploring data and building descriptive and predictive models). It has undergone a lot of development over the past year. A companion book introducing data mining using Rattle is under development, with a draft

Version 2.4.0 of Rattle has been released to CRAN. The rattle package (http://rattle.togaware.com) is a multi platform (GNU/Linux, Mac/OSX, MS/Windows) GTK based GUI for data mining (for exploring data and building descriptive and predictive models). It has undergone a lot of development over the past year. A companion book introducing data mining using Rattle is under development, with a draft

Dear all, I've wanted to give a try to the rattle GUI for R. After long struggle with dependencies I've finally managed to install rattle and all of its dependencies, although for some of them I've been forced to use cran2deb. And now all I get is: > library(rattle) Loading required package: pmml Loading required package: XML Loading required package: RGtk2 Loading required