similar to: Huge data sets and RAM problems

Dear R experts, I would really appreciate if you had an idea on how to use more efficiently the aggregate method: More specifically, I would like to calculate the mean of certain values on a data frame,? grouped by various attributes, and then create a new column in the data frame that will have the corresponding mean for every row. I attach part of my code: matchMean <-

Dear R experts, I have a question about the result of difftime() function: Does it take into account the different number of days in each month. In my example, I have the following: > firstDay [1] "2010-02-20" > lastDay [1] "2010-05-20 16:00:00" > difftime(lastDay,firstDay,units='days') Time difference of 89.625 days > When I count the days I get 88 days

Ol?. Tenho um arquivo que a cada 6 linhas corresponde uma amostra da qual preciso dos coeficientes da regress?o linear. Como fa?o para que o programa distinga a cada 6 linhas como uma amostra e n?o calcule como um todo? Estou usando a fun??o: model=lm(y ~ x) Sueli Rodrigues Eng. Agr?noma - UNESP Mestranda - USP/ESALQ PPG-Solos e Nutri??o de Plantas Fones (19)93442981 (19)33719762

Hi debug-info folks, Time for another update on the variable location "instruction referencing" implementation I've been doing, see this RFC [0, 1] for background. It's now at the point where I'd call it "done" (as far as software ever is), and so it's a good time to look at what results it produces. And here are the scores-on-the-doors using llvm-locstats, on

Dear Sir, I am trying to compile llvm (llvm, clang, compiler-rt) package. I got an errors: /llvm/projects/compiler-rt/lib/tsan/rtl/tsan_defs.h:144:9: error: expression result unused; assign into a variable to force a volatile load [-Werror, -Wunused-volatile-lvalue]. Same errors in lines 145 and 146 ((void) cfg; (void)stats; (void)shadow). OS: RHEL 6.2 (x86-64) GCC: 4.4.6 Compiled with

Awesome to read how it's coming along - I'm mostly aside from the debug location work, but had just one or two clarifying questions On Fri, Nov 6, 2020 at 10:27 AM Jeremy Morse <jeremy.morse.llvm at gmail.com> wrote: > > Hi debug-info folks, > > Time for another update on the variable location "instruction referencing" > implementation I've been doing,

Hi Louis, It's simple to run a r script from the excel spreadsheet. Just write your code, source("C:\\Quantil Aplicativos\\Genercauca\\BackwardSelectionNC.r"), into a cell of a workingsheet. Then right-click the cell and select "run code" in the pop-up menu. Hope this will help you. Best, Bernard -----????----- ???: r-help-bounces at r-project.org [mailto:r-help-bounces