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Dear R list, I think my question maybe easy for you but I really spent entire day to resolve it. Say I have a matrix, rows are 6000 genes, columns(1-6) are 3 genotypes (a,b,c) with 2 repeat. I have to use two groups each time for t-test, a vs. c or b vs. c, but I dont know how to write correct codes. Below is my codes, the last two lines are needed to be corrected....

Hi, how can i use operation + , - , / with veriable format DATES? for example i have two variable a <- 18/08/2008 and b <- 18/09/2010 and i want to calculate a-b ?? thank you? [[alternative HTML version deleted]]

Hey All, So - I promise to write a blog post on this topic and post it somewhere on the internet once I get to the bottom of this. Basically, the set-up to the problem is like this: 1. I have a data frame with dim (2547290, 4) 2. I need to make SQL like lookups on the dataframe. I have been using the following sort of syntax: a.dataframe[a.dataframe[[column_index]] %in% some_value, ] 3.

I'm working with a genomic data-set with ~31k end-points and have performed an F-test across 5 groups for each end-point. The QA measurments on the individual micro-arrays all look good. One of the first things I do in my work-flow is take a look at the p-valued distribution. it is my understanding that, if the findings are due to chance alone, the p-value distribution should be uniform. In

I am getting the following prblem from my Winblows printer. Using the CUPS printer Config tool, the printer can be setup as a smb://host_name/printer When I attempt to send a test page, I get the following message: Description: Brother LaserJet Location: royal Printer State: processing, accepting jobs. "Unable to connect to SAMBA host, will retry in 60 seconds...ERROR: Connection failed

I've tried various commands. ?plot, Teetor's book, "R Cookbook", and Mittal's book, "R Graphs Cookbook" without seeing how to write the command to create scatterplots from my data.frame. The structure is: > str(chemdata) 'data.frame': 14886 obs. of 4 variables: $ site : Factor w/ 148 levels "BC-0.5","BC-1",..: 104 145 126 115

Hallo Everyone, I have a problem getting R DCom to work on a MS Server 2003. I am using Visual Studio 2005 to use some statistical functions from R. I have installed DCOM 1.3.5. but as soon as the statement iR.Init("R") is executed I get the following error: Exception from HRESULT: 0x80040013 I have checked the path and the environmental variables and there are none associated with

I have a data set like the following: subject visit x1 1 1 0.5 1 2 1.2 1 3 0.7 2 1 0.4 2 2 0.6 2 3 1.0 ..... where x1 is the interval between the two visits. Now I want to calculate the cumulative intervals since the beinging, for example subject visit x1 cum 1 1 0.5 0.5 1 2 1.2 0.5+1.2 1 3 0.7 0.5+1.2+0.7 2 1 0.4 0.4 2 2 0.6 0.4+0.6 2 3 1.0 0.4+0.6+1.0 ..... is there an easy to generate the

I just started messing with puppet, and i love it! I have used cfengine in the past, and were in process of planing to replace cfengine now. One thing thats stumped me this weekend and i know i read your working on virtal defines so i can''t do that, but how can i get arond this issue with the curretn setup. I think i am missing something fundamentally simple here. i have this

Hi, Is in R any "fast" algorithm for correlation? What I mean is: I have very large dataset (microarray) with 55000 rows and 100 columns. I want to count correlation (p-value and cor.coef) between each row of dataset and some vector (of course length of this vector is equal to number of columns of dataset). In short words: For t-test we have: "normal" algorithm - t.test

Hi all I have a data set with the total number of columns =ncol, and the total number of rows=nrow. I am trying to loop over the values and id the value is less than or equal to 100 to be changed to 1. if the value is greater than 100 , to be changed to 0. if NA , let X[i,j]=NA. I ran into a problem where if one row in my data set had all values =NA, then the program does not continue working

Hi friends, Please can anyone help me with an easier solution of doing the below mentioned work. Suppose i have a dataset like this:--- i1 i2 i3 i4 i5 1 7 13 1 2 2 8 14 2 2 3 9 15 3 3 4 10 16 4 4 5 11 17 5 5 6 12 18 6 7 *i1,i2,i3,i4,i5 are my items.I am able to find all possible pairs i.e Say this dataframe is "item_pairs" **i1,i2 **i1,i3 **i1,i4 i1,i5 **i2,i1

Hi all, I have some microarray data on 40 samples that fall into two groups. I have a value for 480k probes for each of those samples. I performed a t test (rowttests) on each row(giving the indices of the columns for each group) then used p.adjust() to adjust the pvalues for the number of tests performed. I then selected only the probes with adj-p.value<=0.05. I end up with roughly 2000

Hi Everyone, quick question before the end of the year. I have soem indices to select data from a bigger sample. I want to select n days before each index and n days after the index. Any clever way to do it. A for loop would do but I wanted to know if there is a moreR-friendly way to approach this Example # InitialIndices i2 = (90, 190, 290) # Indices I want to end up with i3 = c(85, 86, 87,

Ok. I'm configuring my iptables scripts so that specific iptables rules for virtual network interfaces used for tinc go on tinc-up-fw and tinc-down-fw custom scripts. When I reload iptables rules manually to apply changes iptables scripts flush all chains and reapply rules and now also search in /etc/tinc/<netname>/ directories if the related virtual network interface is up and running

On 01/01/2013 02:45 PM, Duncan Sands wrote: > Hi Dmitry, > >> >> In our compiler we use a modified version LLVM Polly, which is very >> sensitive to >> proper code generation. Among the number of limitations, the loop region >> (enclosed by phi node on induction variable and branch) is required to >> be free >> of additional memory-dependent

On 9/25/2017 9:14 AM, Björn Pettersson A wrote: > > (Not sure if this exactly maps to “truncating store”, but I think it > at least touches some of the subjects discussed in this thread) > > Our out-of-tree-target need several patches to get things working > correctly for us. > > We have introduced i24 and i40 types in ValueTypes/MachineValueTypes > (in addition to

hello. i downloaded the latest i2 wiki from the subversion repository. i''m not able to see it working even running under webrick (under windows xp sp2). i created the database (mysql 4.1) via "rake migrate" and instantiated the first web through the console (as suggested by the readme file). when running it what i get in the browser window is a blank page and in the webrick

I'm using functions to return a matrix of all permutations of a specified size from a larger list for predictor selection. For each predictor size I use a seperate function like this: bag2 <- function(n) { rl <- c() for (i1 in seq(n)) { for (i2 in seq(n)) { if (length(unique(c(i1,i2)))==1) {next} rl <- cbind(rl,matrix(c(i1,i2))) } }

(Not sure if this exactly maps to “truncating store”, but I think it at least touches some of the subjects discussed in this thread) Our out-of-tree-target need several patches to get things working correctly for us. We have introduced i24 and i40 types in ValueTypes/MachineValueTypes (in addition to the normal pow-of-2 types). And we have vectors of those (v2i40, v4i40). And the byte size in our