similar to: integer and character conversion

Dear All, I have a seemingly very simple question, but I just cannot figure out the answer. I attempted to run the following:a=0.1*(1:9);which(a==0.3);it returns integer(0). But obviously, the third element of a is equal to 0.3. I must have missed something. Can someone kindly explain why? Thanks a lot. Regards,Dajiang [[alternative HTML version deleted]]

Dear All, I use nlminb or optim for maximizing likelihood functions. Sometimes, the parameter values happen to be NA, then the program will hang there and iterate forever without stopping. No error message will be produced. So I can not use error catch method such as "try". Are there any suggestions how I can circumvent this problem? Maybe I can time a function, and if the time exceeds

Dear All,I encountered a problem when I use RWeka for prediction. Specifically, I use the following: res=J48(X1~.,data=mydata); predict(res), #it worked fine but when I tried to use a different data set, i.e. predict(res,newdata=mynewdata); all the predictions I get is 0, which apparently is problematic. What is weird is, if I use the old data, but use the newdata option, i.e.

Dear All, I am writing an R library myself. The package build ok, and can be installed. But when I load the library into R using library('xyz'), then I type ?xyz for help in one of the functions named xyz as well, the following error occured, No documentation for 'xyz' in specified packages and libraries: I do put the .Rd files into the man folder, and the html help files are all

On Mon, Nov 16, 2015 at 7:46 PM, Xie, Huawei <huawei.xie at intel.com> wrote: > On 11/14/2015 7:41 AM, Venkatesh Srinivas wrote: > > On Wed, Nov 11, 2015 at 02:34:33PM +0200, Michael S. Tsirkin wrote: > >> On Tue, Nov 10, 2015 at 04:21:07PM -0800, Venkatesh Srinivas wrote: > >>> Improves cacheline transfer flow of available ring header. > >>> >

On Mon, Nov 16, 2015 at 7:46 PM, Xie, Huawei <huawei.xie at intel.com> wrote: > On 11/14/2015 7:41 AM, Venkatesh Srinivas wrote: > > On Wed, Nov 11, 2015 at 02:34:33PM +0200, Michael S. Tsirkin wrote: > >> On Tue, Nov 10, 2015 at 04:21:07PM -0800, Venkatesh Srinivas wrote: > >>> Improves cacheline transfer flow of available ring header. > >>> >

Hello, I'm trying to fit a logistic curve to data but I'm having a hard time discovering how. Every tutorial I've come across either assumes the logistic curve has 0<y<1 or assumes I have multiple categories of data I simply have two vectors, a and b, of equal length with no missing data, and I suspect they follow a logistic curve. The vectors are a<-c(39609, 39643,

On Wed, Nov 11, 2015 at 02:34:33PM +0200, Michael S. Tsirkin wrote: > On Tue, Nov 10, 2015 at 04:21:07PM -0800, Venkatesh Srinivas wrote: > > Improves cacheline transfer flow of available ring header. > > > > Virtqueues are implemented as a pair of rings, one producer->consumer > > avail ring and one consumer->producer used ring; preceding the > > avail ring

On Wed, Nov 11, 2015 at 02:34:33PM +0200, Michael S. Tsirkin wrote: > On Tue, Nov 10, 2015 at 04:21:07PM -0800, Venkatesh Srinivas wrote: > > Improves cacheline transfer flow of available ring header. > > > > Virtqueues are implemented as a pair of rings, one producer->consumer > > avail ring and one consumer->producer used ring; preceding the > > avail ring

On Tue, Nov 17, 2015 at 08:08:18PM -0800, Venkatesh Srinivas wrote: > On Mon, Nov 16, 2015 at 7:46 PM, Xie, Huawei <huawei.xie at intel.com> wrote: > > > On 11/14/2015 7:41 AM, Venkatesh Srinivas wrote: > > > On Wed, Nov 11, 2015 at 02:34:33PM +0200, Michael S. Tsirkin wrote: > > >> On Tue, Nov 10, 2015 at 04:21:07PM -0800, Venkatesh Srinivas wrote: >

On 11/18/2015 12:28 PM, Venkatesh Srinivas wrote: > On Tue, Nov 17, 2015 at 08:08:18PM -0800, Venkatesh Srinivas wrote: >> On Mon, Nov 16, 2015 at 7:46 PM, Xie, Huawei <huawei.xie at intel.com> wrote: >> >>> On 11/14/2015 7:41 AM, Venkatesh Srinivas wrote: >>>> On Wed, Nov 11, 2015 at 02:34:33PM +0200, Michael S. Tsirkin wrote: >>>>> On Tue,

Hello Gurus: When I plot a survival fit using rpart for the classification tree, for each node, there is a decimal based number above the event/total. I tried to see if it's the exponential ratio or logrithmics, neither seem to be the case. I'm wondering if anyone knows what they are. Thanks, Karen _________________________________________________________________ Find hidden words,

Full_Name: Morten Welinder Version: snapshot OS: Submission from: (NULL) (65.213.85.129) Two things are wrong. 1. There is nan test outside IEEE_754. 2. The meat part of the function should really be something like... if (!lower_tail) x = -x; if (fabs (x) > 1) { double temp = atan (1 / x) / M_PI; return (x > 0) ? R_D_Clog (temp) : R_D_val (-temp); } else

Keno, Perhaps you can view the problem to be the memcpys themselves, We humans can look at the memcpys and see loads and stores but to almost all optimizer passes they aren’t what it is looking for, They instead see function calls which they mostly don’t touch, If these memcpys were inlined into plain old loads and stores The redundant loads and stores should be deleted by existing opts

Dear R users: I assigned students to make some graphs and I'm having trouble answering some questions that they have. We are all working on R 2.1 on Fedora Core Linux 4 systems. 1. In the plot, the axis is not labeled by "numbers", but rather scientific notation like "-2e+08" or such. We realize that means -200,000,000. We want to beautify the plot. We would rather

Dear All I need to generate multivariate NON-NORMAL data in R, which follows a given mean vector and covariance matrix, say multivariate exponential data. How can I do that? Best regards mra

Dear R-help, Here's a simple example of nonlinear curve fitting where nls seems to get the answer wrong on a very simple exponential fit (my R version 2.7.2). Look at this code below for a very basic curve fit using nls to fit to (a) a logarithmic and (b) an exponential curve. I did the fits using self-start functions and I compared the results with a more simple fit using a straight lm()

>>>>> William Dunlap via R-devel >>>>> on Sun, 23 Jun 2019 10:34:47 -0700 writes: >>>>> William Dunlap via R-devel >>>>> on Sun, 23 Jun 2019 10:34:47 -0700 writes: > include/Rmath.h declares a set of 'logspace' functions for use at the C > level. I don't think there are core R functions that call

Dear all, My question is illustrated by the following example: I have a matrix M: > M<- matrix(c("0","0","1","1","0","1","1","0","0","*","1","1","0","1","*"),nrow=3) > colnames(M)<-

Dear Mr. for writing program about Gibbs sampling, i have a question. if i want to generate data from Exponential distribution but range of X is restricted, how can i do? regards, A.Rashidi   [[alternative HTML version deleted]]