Grokbase Groups R r-help June 2012

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704 discussions - 2,549 posts

  • Dear R list members, I have a vector of Cholesky parameterization of a matrix let say A. I would like to compute the determinant and inverse of the original matrix A from the vector of cholesky ...
    Jun 8, 2012 at 5:43 am
    Jun 20, 2012 at 9:44 am
  • I'm fairly new to R and still learning how to use it. I could really use some help with the following problem. I have a huge .csv file containing thousands of measurements on 34 different birds ...
    Jun 8, 2012 at 1:02 pm
    Jun 18, 2012 at 8:29 pm
  • Dear R users, You can literally safe my life my telling me the solution of my problem. I have created matrix of a data frame with 3 columns, with each column representing data of different year. 2 1 ...
    Eliza bottoEliza botto
    Jun 3, 2012 at 1:38 am
    Jun 5, 2012 at 12:05 pm
  • Hello, I have to solve Binary Quadratic Optimization problem i.e the objective function is quadratic, constraints are linear and variable are binary. I checked the "quadprog" package but it does not ...
    Anup BhatkarAnup Bhatkar
    Jun 15, 2012 at 11:47 am
    Aug 3, 2012 at 6:03 am
  • Hi everyone! I have a simple question. my data is predict_SO2_a 1 39.793231 2 30.252578 3 32.467584 4 31.941509 5 27.908320 6 11.594137 7 9.368125 8 12.319093 9 11.558811 10 7.937192 11 11.211306 12 ...
    Jun 29, 2012 at 5:01 pm
    Jul 2, 2012 at 3:42 pm
  • [ please copy me on answers, since I am not subscribed to the list ] Dear all, I am trying to write an R function which uses system.time to determine which of a given list of R expressions executes ...
    Jochen VoßJochen Voß
    Jun 29, 2012 at 5:36 pm
    Dec 9, 2012 at 6:39 pm
  • hi, i am a newbie to R using rocr package to find out accuracy of a model using rpart how to interpret this graph on x-axis cutoff values and on y -values-accuracy values are given . thanks
    Mudit guptaMudit gupta
    Jun 2, 2012 at 6:24 am
    Jul 26, 2012 at 7:46 pm
  • Man, R has a steep learning curve (but I suppose you all know this). I have very little programming knowledge, so when I search for answers to my questions, I struggle with making sense of a lot of ...
    Jun 22, 2012 at 4:21 pm
    Jul 12, 2012 at 7:42 pm
  • Dear R Users: I'm a STATA user converting to R, and I'd like to be to do the following. #Assign var_1 and var_2 a value 10- var1 20- var2 #Now I'd like to print the values of var_1 and var_2 by ...
    Jun 28, 2012 at 12:22 am
    Jun 29, 2012 at 7:59 pm
  • Dear List Members I used to play around with R to answer the following question by simulation (I am aware there is an easy explicit solution, but this is intended to serve as instructional example) ...
    Simon KnosSimon Knos
    Jun 15, 2012 at 8:40 am
    Jun 19, 2012 at 6:59 am
  • by considering this example from barley dataset #code start dotplot(variety ~ yield | site, data = barley, scales=list(x=list(log=TRUE)), layout = c(1,6), panel = function(...) { panel.dotplot(...) ...
    Jun 6, 2012 at 12:10 pm
    Jun 15, 2012 at 10:13 am
  • Hello dear R-users, I have a problem in my code about ignoring NA values without removing them. I'm working on a list of files. The aim is to fill one file from another according to the highest ...
    Jun 4, 2012 at 8:56 am
    Jun 6, 2012 at 6:13 pm
  • Hi, I have some trouble with the following: I have a table of 7 rows and 6columns. The columns 1,2,3 have information about the number of employees. The columns 4,5,6 have information about the ...
    Jun 15, 2012 at 8:09 am
    Jun 25, 2012 at 11:53 am
  • Hello, I am trying to build a large size identity matrix using diag(). The size is around 23000 and I've tried diag(23000), that took a long time. Since I have to use this operation several times in ...
    Ceci TamCeci Tam
    Jun 7, 2012 at 7:55 am
    Jun 15, 2012 at 8:05 pm
  • Hi all, How do I obtain the current active path of a function that's being called? That's to say, I have several source files and they all contain definition of function A. I would like to figure out ...
    Jun 5, 2012 at 8:58 pm
    Jun 7, 2012 at 6:56 pm
  • Hi folks, I have some data where I have to investigate with a suitable QQ-plot wheter or not the measurement erros are normally distributed. The distributed data are form the residuals of a lineair ...
    Jun 19, 2012 at 10:12 am
    Jun 20, 2012 at 6:48 am
  • Hello all, I'm new here and new to R, but I have to admit I'm learning rather fast. Right now I need to write a loop, and I don't seem to think I'm doing it properly, judging by the errors I get! ...
    Jun 15, 2012 at 9:41 pm
    Jun 18, 2012 at 4:43 pm
  • Hi I have a follow up question, relating to subsetting to list items. After using the list and min(sapply()) method to adjust the length of the variables, I specify a dynamic regression equation ...
    Lekgatlhamang, lexi SetlhareLekgatlhamang, lexi Setlhare
    Jun 30, 2012 at 10:04 pm
    Jul 2, 2012 at 3:55 pm
  • Hi All, when using the linear model lm() to fit data of the form y = k * x + b, is it possible to know the p-value for the parameters k and b? i.e. can we find the result of the form (k, ?k; b, ?b)? ...
    Li SUNLi SUN
    Jun 24, 2012 at 3:47 pm
    Jun 24, 2012 at 10:46 pm
  • Hi, I have been trying to get the sub function to work but can't for the life of me figure it out. I tried looking at ?sub but I think there is something that I am just not understanding. Example ...
    Lopez, DanLopez, Dan
    Jun 14, 2012 at 10:23 pm
    Jun 19, 2012 at 8:44 pm
  • Hello, How do I change this: [1] "\002" "\001" "\102" this: [1] "2" "1" "102" Having trouble because of this: [1] 1 Thanks! Ben
    Ben quantBen quant
    Jun 8, 2012 at 5:11 pm
    Jun 15, 2012 at 4:55 pm
  • useRs- I'm attempting to scan a more than 1Gb text file and read and store the values that follow a specific key-phrase that is repeated multiple time throughout the file. A snippet of the text file ...
    Jun 6, 2012 at 4:54 pm
    Jun 8, 2012 at 2:30 pm
  • Hi! I am getting a lot of numbers in the background of the pca screeplots if i use call("plot") and eval(somecall). Til now, creating the calls and plotting later on this way worked fine. Example ...
    Jessica StreicherJessica Streicher
    Jun 28, 2012 at 3:03 pm
    Jul 2, 2012 at 10:53 am
  • Hello, helpeRs, I am attempting to reshape (either base R or package reshape) multiple .csv spreadsheets from a very unfortunate wide format to long format. ?Each spreadsheet looks something like ...
    Jun 20, 2012 at 4:08 pm
    Jun 21, 2012 at 7:06 pm
  • Hi all, I just started using the rgl package in R, and I need to know how I connect the dots I created. A simple line from one co?rdinate (x0,y0,z0) to another (x1,y1,z1) will do. I tried using the ...
    Jun 12, 2012 at 3:45 pm
    Jun 14, 2012 at 3:37 pm
  • Hi all, I have done a backward stepwise selection on a full binomial GLM where the response variable is gender. At the end of the selection I have found one model with only one explanatory variable ...
    Jun 4, 2012 at 11:00 am
    Jun 6, 2012 at 5:44 pm
  • Hello, I'd have a time series, where I am plotting the means and sd of a distance for a variety of positions along a bird's bill. I'd like to set each line (represented by "point") to start at zero, ...
    Kristiina HurmeKristiina Hurme
    Jun 30, 2012 at 9:21 pm
    Jul 2, 2012 at 8:51 pm
  • Hi all, I have a text file in which the graph info is stored as: node1 node2 attr1 attr2 where there is an edge b/w node1&2 and attr1&2 are edge atttributes is there any way to create a graph using ...
    Jun 29, 2012 at 5:28 pm
    Jul 1, 2012 at 5:33 am
  • Hello, R-help, does anybody have already a work-around for the problem that the formula version of sunflowerplot() throws an error when provided with a value for xlab (or ylab) different from NULL ...
    Gerrit EichnerGerrit Eichner
    Jun 27, 2012 at 11:16 am
    Jun 29, 2012 at 1:35 pm
  • Dear list! I would like to calculate "chisq.test" on simple data set with 70 observations, but the output is ''Warning message:'' Warning message: In chisq.test(tabele) : Chi-squared approximation ...
    Omphalodes VernaOmphalodes Verna
    Jun 26, 2012 at 6:27 pm
    Jun 28, 2012 at 4:39 am
  • Hi is there a command that calculates the correct adjusted R-squared, when I work without intercept? (The R-squared from lm without intercept is false.) Greetings Chrsitof
    Christof KlußChristof Kluß
    Jun 27, 2012 at 7:33 am
    Jun 27, 2012 at 1:44 pm
  • Hi, I work with data sets with lots of missing values. We often need to conduct logical tests on numeric vectors containing missing values. I've searched around for material and conversations on this ...
    Anthony DamicoAnthony Damico
    Jun 20, 2012 at 8:44 pm
    Jun 20, 2012 at 11:20 pm
  • Hi all, Is there any problem of precision when using seq?. For example: x<- seq(0,4,0.1) x[4]=0.3 BUT: x[4]-0.3=5.551115e-17 It means when I use this condition within an if clause, it does not find ...
    Jun 18, 2012 at 7:58 pm
    Jun 19, 2012 at 5:12 am
  • I noticed about a couple weeks ago that my R start up script starting showing the below errors, following the line "Type 'q()' to quit R" Not sure what I did different and so far it hasn't caused ...
    Lopez, DanLopez, Dan
    Jun 18, 2012 at 3:25 pm
    Jun 18, 2012 at 10:42 pm
  • hello, I want to know we can separate the sentence after finding a particular word... for example I love to watch movies of Hollywood but should not be romantic...I want to join you school but ...
    Jun 13, 2012 at 12:06 pm
    Jun 14, 2012 at 3:42 pm
  • I am very new to Linux so I probably am doing something stupid but I cannot seem to update to R 2.15 Using Ubuntu 12.02 Precise Penguin I realise that debian packages are not updated regularly so I ...
    John KaneJohn Kane
    Jun 12, 2012 at 3:46 pm
    Jun 12, 2012 at 5:38 pm
  • R-Help community, I understand that data.frames can hold elements of type double, string etc but NOT objects (such as a matrix etc). This is not convenient for me in the following situation. I have a ...
    Onur UncuOnur Uncu
    Jun 10, 2012 at 10:41 am
    Jun 12, 2012 at 3:15 pm
  • Dear useRs, I reran an analysis with bam (mgcv, version 1.7-17) originally conducted using an older version of bam (mgcv, version 1.7-11) and this resulted in the same estimates, but much lower ...
    Martijn WielingMartijn Wieling
    Jun 2, 2012 at 4:25 pm
    Jun 11, 2012 at 11:36 am
  • I'm attempting to change a data set by compressing rows into columns. Currently there are several rows that all have information about one "patient," but at different cycles. I'm trying to make each ...
    Jun 6, 2012 at 4:07 am
    Jun 6, 2012 at 9:26 pm
  • Dear list, I have install R15.0 on Ubuntu system using the source code. It is install to my home directory. I have no root privilege. When I start R, I got this warning message: During startup - ...
    Jinyan HuangJinyan Huang
    Jun 3, 2012 at 6:34 am
    Jun 4, 2012 at 5:10 am
  • Hi R users all , I have a clean install of R-2.15.0 in a win32 machine and a problem loading Matrix 1.0-6 that looks like this: Loading required package: lattice Error : object ?kronecker? is not ...
    Jun 9, 2012 at 12:52 am
    Jul 10, 2012 at 1:48 am
  • Dear List, I've created a two-dimensional array which shall contain a value and its error, respectively. These two values are concatenated in al list and bear the names "sl" and "sl_err" But I can't ...
    Jun 30, 2012 at 1:35 pm
    Jul 2, 2012 at 1:15 am
  • Is there away of putting an excel style gradient background? I want to have dark blue in the middle and shad to white on the top and bottom. -- View this message in context ...
    Jun 1, 2012 at 8:26 pm
    Jun 30, 2012 at 5:57 pm
  • Dear all, I would like to (i) produce boxplot graphs with axis in logarithm in base 10 and (ii) showing the values on the axis in 10^exponent format rather than 10E+exponent. To illustrate with an ...
    Jun 22, 2012 at 2:54 pm
    Jun 25, 2012 at 9:45 am
  • Good day, For lack of a better solution (or perhaps I am ignorant to something more elegant), I have been bootstrapping panel data by hand so to speak and I would like to know if there is a way to ...
    Taylor WhiteTaylor White
    Jun 24, 2012 at 9:15 pm
    Jun 25, 2012 at 5:27 am
  • Hi, I'm unable to find a way to smooth data for a persp() graph. Example, suppose that I have data x,y,z like this: x <- 1:10 y <- 1:10 k <- 20 z <- outer(x, y, "*") + matrix( k*runif(100, -1, 1), ...
    Guillaume ChapronGuillaume Chapron
    Jun 19, 2012 at 12:26 pm
    Jun 19, 2012 at 3:45 pm
  • Hey R folks, i found some strange (to me) behaviour with chron to POSIXct conversion. The two lines of code result in two different results, on ewith the correct time zone, one without ...
    Jun 15, 2012 at 7:25 am
    Jun 16, 2012 at 1:58 pm
  • Hi all ? I am a newbie to R and have had a terrible time trying to figure out how to set up an analysis.? I have installed and loaded the appropriate package (phyloclim), but I do not even know where ...
    Brent HendrixsonBrent Hendrixson
    Jun 13, 2012 at 3:55 pm
    Jun 15, 2012 at 9:58 pm
  • Good morning. I have a real fuzzy question to ask; we have a calculation engine which is composed by n virtual machines each of them with a jvm 2GB of memory on Linux Red Hat each of them with the ...
    Jun 15, 2012 at 8:05 am
    Jun 15, 2012 at 4:58 pm
  • Dear R experts, I am interested in getting the dimensions for the matrix dynamically, based on the the number of elements in a matrix for example. if the number is 12, I should get dim= 3X4, if it is ...
    Jun 14, 2012 at 12:51 pm
    Jun 14, 2012 at 3:40 pm
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