search for: differec

A quick question x <- as.yearmon(2000 + seq(0, 23)/12) x [1] "Jan 2000" "Feb 2000" "Mar 2000" "Apr 2000" "May 2000" "Jun 2000" "Jul 2000" "Aug 2000" "Sep 2000" "Oct 2000" "Nov 2000" "Dec 2000" "Jan 2001" [14] "Feb 2001" "Mar 2001" "Apr

The algorithm does make a differece. You can use Kahan's summation algorithm (https://en.wikipedia.org/wiki/Kahan_summation_algorithm) to reduce the error compared to the naive summation algorithm. E.g., in R code: naiveSum <- function(x) { s <- 0.0 for(xi in x) s <- s + xi s } kahanSum <- function (x) {...

...ocating storage space p_myint = INTEGER_POINTER(myint); p_myint[0] = 7; UNPROTECT(1); return myint; } then type at the command prompt: R CMD SHLIB useCall3.c to get useCall3.so In windows platform ,how can I create right dll to let dyn.load use and for .c ,.call ,external ,what are the differece? which one is better for getting vector from C? thanks in advance Michael

Dear R-Experts, Seek your help. In a List object e.g. Time_duration[[]], I am storing differece between two time-stamps (start-time and end-time) for a certain event. Time difference does not remain constant for, say, 10 observations. Each time, the time difference is given in different time units: seconds / hours / minutes. Can you please tell me - how I can store the values of time differ...

...exe --active --directory /downloadedPrograms/syslinux \ --update --mbr c: (line was edited for presentation purposes) and got the same error message. 1) I think it should specifically written that the update is not yet implemented. 2) Am I the only one who hardly understand the differece between --update and --install? For example, can I assume that with --update, the directory will only change if I add a --directory DIR? Why suggest both an --update and --install?

...was wondering is using the isolinux.cfg to setup kernal boot options to have a limited number of kernels, but provide additional configurations. Each kernel is about 5MB, so limiting number cuts down on the image file. I've tried this by adding the debugboot option, but didn't see much differece in the boot process, perhaps a few additional message lines, but my machines don't get an error. Thanks for any information. +----------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor Guam Community College Computer Center...

Hi all, where can I set the date in domU. ''ntpdate -u ...'' works but dosn''t set the date. date MMDDhhmm has also no effect. What can I do? -- cu Roland Kruggel  mailto: rk-liste@gmx.de System: Intel 3.2Ghz, Debian etch, 2.6.15, KDE 3.4 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com

...e fruit tree under treatment. I found that there are interaction between two factors. I wonder if I can contrast means from levels of one factor (section) under another factor (treat)? if so, how to do it in R and how to interpret the output? Here is the data and commands I used to test the differece between section 1 to 8 and 9 to 11 under treatment. But I don't know if I was right, how to interpret the out and whether there are significant difference between section 1 to 8 and section 9 to 11 under treatment. yield replicate treat section 35.55 1 Ctl 1 53.70 1 Ctl 2 42.79 1 Ctl 3...

Dear, R experts. I have two program codes, one is made by Splus and the other is made by transferring from Splus code. Because "nlminb" function in Splus is equivalent to "optim" in R, I expected to get exactly same result. But, sometime there is too large differece (greater than 2%) between two outputs. I looked two help files. According to those, in Splus, quasi-Newton method was used with hessian or gradient option unchecked and in R, "BFGS" method is a quasi-Newton method. Therefore, if we use "BFGS" method in R, we are using same meth...

Hi all: I've written a function and saved the worksapce.When the workspace of my function is re-open,I want display some introduction or step by step guidance of the function for the users.How can I do it? Thanks a lot! My best regards!

...profiling the code. BTW the DDD documentation is excelent. It comes with a nice thick book that is even in color. DDD was written by a group of university students in Germany before turning it over to the FSF. It is profesion quality and very mature. I'm still betting the root cause is the differece between the Linux and BSD pthreads implementation. ===== Chris Albertson Home: 310-376-1029 chrisalbertson90278@yahoo.com Cell: 310-990-7550 Office: 310-336-5189 Christopher.J.Albertson@aero.org KG6OMK __________________________________ Do you Yahoo!? Exclusive Video Premiere - B...

On 11-Feb-08, at 6:00 PM, Erik de Castro Lopo wrote: > Personally, I think that change should be reverted and another > cleaner solution found to address that problem. Agreed, although it doesn't make that much differece; the code is broken either way. Ivo, if you don't want to do the alternate patch, you might ask the original contributor? -r

Dear all, What is the usage of the ".Call()"? What is the meaning of the follows: S=.Call("RS_fractal_spectral_density_function_direct",x,as.vector(taper.),as.logical(center),as.logical(recenter),TRUE,as.integer(npad),COPY=rep(FALSE,6),CLASSES=c(rep("matrix",2),rep("logical",3),"integer"),PACKAGE="ifultools") And is a function

Hi, I'm trying to create a linear model for a dataset that has a breakpoint e.g. # dummy dataset x <- 1:20 y <- c(1:10,seq(10.5,15,0.5)) plot(x,y) I've modelled this using the following formula: temp <- lm(y ~ x*(x<=10)+x*(x>10)) I want to be able to omit the intercept (i.e. force the line through zero) from the first of these segments (x<=10) so that I'm only

Dear Will, This is exactly what I find. My point is thus that the sum function in R is not a naive sum nor a Kahansum (in all cases), but what algorithm is it using then? Cheers, Rampal On Tue, Feb 19, 2019, 19:08 William Dunlap <wdunlap at tibco.com wrote: > The algorithm does make a differece. You can use Kahan's summation > algorithm (https://en.wikipedia.org/wiki/Kahan_summation_algorithm) to > reduce the error compared to the naive summation algorithm. E.g., in R > code: > > naiveSum <- > function(x) { > s <- 0.0 > for(xi in x) s <- s + x...

...-armadillos-accu/ which points out that sum() isn't doing anything fancy *except* using extended-precision registers when available. (Using Kahan's algorithm does come at a computational cost ...) On 2019-02-19 2:08 p.m., William Dunlap via R-devel wrote: > The algorithm does make a differece. You can use Kahan's summation > algorithm (https://en.wikipedia.org/wiki/Kahan_summation_algorithm) to > reduce the error compared to the naive summation algorithm. E.g., in R > code: > > naiveSum <- > function(x) { > s <- 0.0 > for(xi in x) s <- s +...

...nd. > My point is thus that the sum function in R is not a naive sum nor a > Kahansum (in all cases), but what algorithm is it using then? > > Cheers, Rampal > > > On Tue, Feb 19, 2019, 19:08 William Dunlap <wdunlap at tibco.com wrote: > >> The algorithm does make a differece. You can use Kahan's summation >> algorithm (https://en.wikipedia.org/wiki/Kahan_summation_algorithm) to >> reduce the error compared to the naive summation algorithm. E.g., in R >> code: >> >> naiveSum <- >> function(x) { >> s <- 0.0 >&g...

Hi all, While tinkering with saturation instructions, I hit problems with the cost model calculations. The loop vectorizer cost model accumulates the individual TTI cost model of each instruction. For saturating arithmetic, this is a gross overestimate, since you have 2 sexts (inputs), 2 icmps + 2 selects (for the saturation), and a truncate (output); these all fold alway. With an intrinsic,

...75)/(nc+0.75))) + ans<-(za*sqrt(1+(ne+0.5)/(nc+0.5))+zb)^2/(2*(xe-xc))^2-0.5 + return(ans) + } > ## needed for method 3 > c.searchd<-function(nc, d, ne, alpha=0.05, power=0.8, cc=c(0.1,2),tol1=0.0001){ + #--------------------------- + # nc     sample size of control group + # d      the differece to detect between control and experiment + # ne     vector of starting sample size of experiment group + #    corresonding to rc of 0 to nc*(1-d) + # alpha  size of test + # power  target power + # cc  pre-screen vector of constant c, the range should cover the + #    the value of cc that has ex...

Hello everybody! I've seen that you can connect your cellphone via bluetooth, but I've a Motorola V300 and it doesn't have that feature, so I wish to connect it via USB cable, is it pissible con use my cellphone with asterisk like that? I 've not been able to find information on how to do this, I'l appreciate any help. Thanks in advance! -- Facundo Ameal.