similar to: [LLVMdev] Cache optimizations and data layout

Hi, is there a way to take a data frame with 100+ columns and large data set to do efficient exploratory analysis in R with pairs? I find using pairs on the whole matrix is slow and the resulting matrix is tiny. Also the variable of interest for me is a binary var Y or N . Is there an efficient way to graphically view many variable relationships that does not look teeny ? I could do

Hi, is there a way to take a dataset and extract numeric columns and create interaction columns from it automatically? For e.g. there are 5 columns of data: A,B,C,D,E. CDE are numeric. Can someone provide code to automatically create more columns such as: 1) C*D, C*E, C*D*E, (C+E)/(D+.01 (to avoid divide by zero), (D+E)/(C+.01 (to avoid divide by zero), (C+D)/(E+.01 (to avoid

Hi, To pretty print aggregates by various dimensions I needed to add a empty row in output of aggregate. For example. d<-(aggregate(data[,cbind("x")], by=list(data$group1,data$group2), sum)) Group.1 Group.2 x 1 A N 3 2 A Y 2 3 B N 420164905 Is there a way to add an empty

Hi All, I am new to this community and just subscribed. We have Asterisk running in production but I could not find out in documentation as well as web that how many maximum number of registrations an Asterisk Server can support. We have it on a 1.4 GHz Processor, 2 GB RAM and 40 GB HDD IBM Server. Please suggest urgently. Thanks. Best Regards, ------------------------------------- Abid

https://bugs.freedesktop.org/show_bug.cgi?id=101559 Bug ID: 101559 Summary: Displays fail to wake up when booting machine away from Display Port KVM switch Product: xorg Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority:

Hi, In a binary classification dataset is there a way to tune rpart to now allow any false positives. I.e. is there some setting that will enforce no false positives (prior etc)? (and yet Without making the tree pick all 0 or 1 outcome) Dhruv [[alternative HTML version deleted]]

Hi, Is there a way to get/extract a matrix of regression variable name, coefficient, and p values? (for lm and glm; which can be sort by p value?) thanks Dhruv [[alternative HTML version deleted]]

Hi, is there an easy way to get the calculated weights in a regression equation? for e.g. if my model has 2 variables 1 and 2 with coefficient .05 and .6 how can I get the computed values for a test dataset for each coefficient? data var1,var2 10,100 so I want to get .5, 60 back in a vector. This is a one row example but I would want to get a matrix of multiplied out coefficients

Hi, Is there a way to save R models (glm, lm , rpart etc) in a file that be read in later? I noticed models take up space. by space them off and removing them from memory it seems that would be useful. Also why do the models keep a copy of all columns in the original data set even those columns are not in the model. E.g. if I build a model on columns A, B even thought column C

Hi, How do I access the loop variables in a loop. for(i = 0; i < N; i++) for(j = 0; j < M; j++) A[i][j+k] = i + j; Is there anyway for me to know that in A[i][j+k], i & j are loop variables whereas k is not! Regards, Prasenjit Chakraborty Performance Modeling and Analysis IBM Systems & Technology Lab

Hi, 1) I have noticed that when I use the aggregate function it outputs numbers in the results. for example: aggregate by product group.1 Aggregate 1 ProductA 1000400.00 2 ProductB 23232323.00 3 Missing 232323.00 is there a way to suppress the numbers infront of aggregate outputs. I checked and they don't look like columns when I do a summary so I can't -1

Hi, I have some queries that I use to get time series information for 8 seperate queries which deal with a different set of time series each. I take my queries run them and save the output as csv file and them format the data into graphs in excel. I wanted to know if there is an elegant and clean way to read in 1 csv file but to read the seperate matrices on different rows into seperate

Hi, When I include a categorical variable (RACE with 3 levels - "white", "black" and "other") in my logistic regression model, the correlation matrix of the coefficients gets messed up. I get something like: ----------------------------------------- Correlation of Coefficients: ( A L RACEb AGE , 1 LWT , 1 RACEblack 1

Hi all, I need some quick help in jquery. While using jquery ajax.Submit(), we can specify the target div to be modified with the template rendered by the corresponding action. Is there way using which we can update multiple divs ( using render update) from the called action in ajax.submit() I am stuck and for now i am populating a complete page again but its incorrect. I need to update

Hi Prof. Williams, thanks for your suggestion. The updated code is below. It turns out it was a matter of displaying the second column in yval to get the number of N and subtracting it from the n column in the frame to get the number of Y remaining in a binary example. once this is added now the function returns the rules along with Y and N count affected by the resulting rule. I am ccing

Hi All, My R code takes very long time to finish the processing. I want to see at what stage the script is running. So I wrote some output messages using cat. But instead of displaying the cat messages at different stages they are buffered and displayed in the end when entire processing is done. Can you please suggest how to stop this buffering or some alternative way to display messages Thank

Hi All, I am trying to make R package using R 2.6.2 And I am getting following error. When I give R CMD check t1\ ---------- Making package t1 ------------ adding build stamp to DESCRIPTION making DLL ... making CGHseg_rewrite.d from CGHseg_rewrite.c making rowMedians.d from rowMedians.c making runavg.d from runavg.c gcc-sjlj -std=gnu99 -Ic:/R/R-2.6.2/include -O3 -Wall -c

Hello, I have installed R 2.6 on windows 2000 and now from the command prompt when I type R it show " 'R' is not recognized as an internal or external command, operable program or batch file." If I change the path to C:\R\R-2.6.2\bin and then type R it runs fine. I have changed my envionment variable Path to C:\R\R-2.6.2\bin; Still its not working. Can you please give some

Hi All, I am calling some c code from R. It successfully makes the dll and .so files. When I run .so in Linux is works prefect but hangs in windows. Though the dll loads but it never returns back from the c function Can you please suggest the possible cause of this thank you vidhu [[alternative HTML version deleted]]

Hi All, I am trying to make write a table in RSQLite. And I get the error mentioned below mat<-as.data.frame(matrix(rnorm(n=244000000),nrow=244000,ncol=1000)) > dbWriteTable(con, "array", mat) [1] FALSE *Warning message: In value[[3]](cond) : RS-DBI driver: (error in statement: too many SQL variables)* Can someone please tell me what is maximum size of a table( max number of