Extract.data.frame {base} R Documentation Extract or Replace Parts of a Data Frame Description Extract or replace subsets of data frames. Usage x[i] x[i] <- value…
View More Extract or Replace Parts of a Data FrameCategory: R
Regular Expression Tutorial 2: Commands in R
The second part of the tutorial for regular expression will cover common commands used in R together with regular expression. Once you know how to…
View More Regular Expression Tutorial 2: Commands in Rextract all numbers from a string
Thanks *VERY* much, this is great! I realized a few more cases, I think I’ve got something that covers all the possibilities now: library(stringr) tmpstr…
View More extract all numbers from a stringImporting Data Into R from Different Sources
I have found that I get data from many different sources. These sources range from simple .csv files to more complex relational databases, to structure…
View More Importing Data Into R from Different SourcesHow to Become an Efficient and Collaborative R Programmer
I may want to add a subtitle “Why R-Forge Must Die” (thinking of Barry Rowlingson’s talk earlier this year). I have been a GitHub user…
View More How to Become an Efficient and Collaborative R ProgrammerDemonstrating the Power of F Test with gWidgets
We know the real distribution of the F statistic in linear models — it is a non-central F distribution. Under H0, we have a central…
View More Demonstrating the Power of F Test with gWidgetsCross-Validation for Linear Regression
cv.lm {DAAG} R Documentation Cross-Validation for Linear Regression Description This function gives internal and cross-validation measures of predictive accuracy for ordinary linear regression. The data…
View More Cross-Validation for Linear RegressionMULTIPLE REGRESSION
Preliminaries Model Formulae If you haven’t yet read the tutorial on Model Formulae, now would be a good time! Statistical Modeling There is not space in…
View More MULTIPLE REGRESSIONCRAN Task View: Computational Econometrics
CRAN Task View: Computational Econometrics Maintainer: Achim Zeileis Contact: Achim.Zeileis at R-project.org Version: 2014-02-28 Base R ships with a lot of functionality useful for computational…
View More CRAN Task View: Computational EconometricsModel Validation: Interpreting Residual Plots
July 18, 2011 By Daniel Hocking (This article was first published on Quantitative Ecology, and kindly contributed to R-bloggers) When conducting any statistical analysis it is important to…
View More Model Validation: Interpreting Residual Plots