similar to: how can I write code to detect whether the machine is Windows or Linux?

Hi: I have a matrix, named "mat," of numeric values that are in days since Jan 1, 1960. I want to convert them Date class values so that I can do things like seq( value , len=10, by="1 week") where "value" is any of the matrix elements. How do I do this? Please reply to: philipsmith at alumni.albany.edu Thanks! Phil Smith Duluth, GA

Hi R-ers: I need to compute the distance between 2 street addresses in either km or miles. I do not care if the distance is a "shortest driving route" or if it is "as the crow flies." Does anybody know how to do this? Can it be done in R? I have thousands of addresses, so I think that Mapquest is out of the question! Please rely to: philipsmith at alumni.albany.edu Thank

Hi R Community: I want to take the difference in two dates: dt2 - dt1. But, I want the answer in months between those 2 dates. Can you advise me? Please respond to: pzs6 at cdc.gov Thank you! Phil Smith Centers for Disease Control and Prevention

I would like to create a binary package for Windows which when installed will give the user an option of whether to install one version or another. Here is the problem, I have a package 'FAME' that can run in two different modes on Windows. An old mode that uses R to connect to a remote linux machine and a new way that uses a locally installed database. I would allow this decision to be

I am considering a package with a namespace (Rgraphviz from Bioc). I essentially want to have some error handling for loading the dll, something like wrapping it into tryCatch or similar (reason: see below). Right now I am loading the dynamic libraries by useDynLib in my NAMESPACE file. When I look at the code from loadNamespace, I have the impression that what I want is impossible

Phil, If you have only a list of addresses and nothing else - i have to recognize i am "lost". But if you have more info you can use a GIS software and it will calculate your distance automatically for all your addresses. To have your distance in miles or Km you need to have a projection in your data which will establish your units. The very basic principle is that for each address

Hello, I am a student and I working with R. I want to ask you how to solve this integral which is shown in image attach with this letter. And how to draw this function z = 4 ? x2 ? y2 , width intervals x = ?1, y = ?1. Thank You. Yours sincerely, Jolanta

On Sun, 28 Jan 2018, phil at philipsmith.ca wrote: > I have a data set with quarterly time series for several variables. The > time index is recorded in column 1 of the dataframe as a character > vector "Q1 1961", "Q2 1961","Q3 1961", "Q4 1961", "Q1 1962", etc. I want > to produce line plots with ggplot2, but it seems I need to

Using Achim's d this also works to generate z where FUN is a function used to transform the index column and format is also passed to FUN. z <- read.zoo(d, index = "time", FUN = as.yearqtr, format = "Q%q %Y") On Sun, Jan 28, 2018 at 4:53 PM, Achim Zeileis <Achim.Zeileis at uibk.ac.at> wrote: > On Sun, 28 Jan 2018, phil at philipsmith.ca wrote: > >> I

Ryacas is now available on CRAN. (Previously it was available on the Omegahat repository.) Ryacas is an R package that provides an interface from R to the yacas computer algebra system. It can be used for computer algebra, exact arithmetic, ASCII pretty printing and R to TeX output. R, yacas and Ryacas are all free software packages distributed under the GPL version 2. Ryacas is written in R.

Ryacas is now available on CRAN. (Previously it was available on the Omegahat repository.) Ryacas is an R package that provides an interface from R to the yacas computer algebra system. It can be used for computer algebra, exact arithmetic, ASCII pretty printing and R to TeX output. R, yacas and Ryacas are all free software packages distributed under the GPL version 2. Ryacas is written in R.

Ryacas is an R interface to the free yacas computer algebra system. Ryacas allows one to send R expressions, unprocessed yacas strings and certain other R objects to a separate yacas process from R and get back the result. It also has facilities for manipulating yacas strings and R expressions destined for yacas processing. It can be used for exact arithmetic, symbolic math, ASCII pretty

Ryacas is an R interface to the free yacas computer algebra system. Ryacas allows one to send R expressions, unprocessed yacas strings and certain other R objects to a separate yacas process from R and get back the result. It also has facilities for manipulating yacas strings and R expressions destined for yacas processing. It can be used for exact arithmetic, symbolic math, ASCII pretty

Ryacas is an R interface to the free yacas computer algebra system. Ryacas allows one to send R expressions, unprocessed yacas strings and certain other R objects to a separate yacas process from R and get back the result. It also has facilities for manipulating yacas strings and R expressions destined for yacas processing. It can be used for exact arithmetic, symbolic math, ASCII pretty

Has anyone successfully used Rcmd install or Rcmd check on Windows Vista? I have been successfully been running R itself, just not Rcmd install and Rcmd check. Rcmd check fails, the Ryacas.Rcheck it creates is read-only, I don't have permission to delete it and I have to reset the permissions on it just to delete it. With Rcmd install I am getting the following which looks like I am running

I'm tinkering around in Ryacas trying to find an easy way to get the first and second partial derivatives of mu and sigma from a normal distribution (actually a bitterly ugly likelihood but this example works for now). I've done all of the work in Mathematica, but I then need to manually write R code whereas I think Ryacas will give me the expression such that I can export for Tex and

I am having issues with Ryacas errors. I searched and found this error was reported in 2006, but nothing since. > library(Ryacas) Loading required package: XML > yacas(expression(Factor(x^2-1))) [1] "Starting Yacas!" CommandLine(1) : Expecting ) closing bracket for sub-expression, but got ^ instead > yacas("D(x)Sin(x)") CommandLine(1) : Expecting ) closing bracket

hey all, after following the directions in the "FreeBSD Active Directory Domain Member Mini-HOWTO" http://web.irtnog.org/howtos/freebsd/winbind i am able to get my machine to the point where i can query users with 'wbinfo': $ wbinfo -u|grep galbrecht galbrecht i am unable, however, to login to my machine using any service, telnet for example: $ telnet -K localhost

Dear All I am doing the following: > x <- yacas("3/2") > for (i in 2:400) + x <- yacas(paste(x,"*",x)) > x expression(Inf^1.260864167e+117/Inf^6.304320836e+116) > Eval(x) [1] NaN No luck this way. However, I am successful with > y <- yacas("(3/2)^400") > y expression(7.05507910865533e+190/2.58224987808691e+120) > Eval(y) [1]

I'm having trouble loading Ryacas. I've downloaded and extracted Ryacas 0.2-9 (also tried Ryacas ) and yacas 1.0.63, have the latest version of R and have tried the following (this works for installing other packages): install.packages("Ryacas") library(Ryacas) install.packages("yacas") library(yacas) and get this: Warning message: package ‘yacas’ is not available