만약 정확한 함수 이름을 기억하고 있지 않다면 ‘??’ 뒤에 찾고자 하는 문자열을 입력한다. 또는 help.search(“찾고자 하는 문자열”)을 입력해도 된다. 다음은 ‘print’를 포함하는 도움말을 검색한 예다.

> ??print
Vignettes with name or keyword or title matching 'print' using fuzzy
matching:

Rcpp::Rcpp-introduction
                       Rcpp-introduction

Type 'vignette("FOO", package="PKG")' to inspect entries 'PKG::FOO'.


Demos with name or title matching 'print' using fuzzy matching:>

gbm::printExamples      simple examples used to test gbm updates 
tcltk::tkcanvas         Creates a canvas widget showing a 2-D plot with
                        data points that can be dragged with the mouse. 

Type 'demo(PKG::FOO)' to run demonstration 'PKG::FOO'.


Help files with alias or concept or title matching 'print' using fuzzy
matching:

ada::print.ada             Model Information for Ada
arm::balance-class         Functions to compute the balance statistics
arm::bayesglm-class        Bayesian generalized linear models.
arm::bayespolr-class       Bayesian Ordered Logistic or Probit Regression
Boruta::print.Boruta       Print Boruta object
bst::bst                   Boosting for Classification and Regression
bst::mhingebst             Boosting for Multi-class Classification
bst::mhingeova             Multi-class HingeBoost
car::Anova                 Anova Tables for Various Statistical Models
car::Boxplot               Boxplots With Point Identification
car::boxTidwell            Box-Tidwell Transformations
car::compareCoefs          Print estimated coefficients and their standard
                           errors in a table for several regression
                           models.
car::durbinWatsonTest      Durbin-Watson Test for Autocorrelated Errors
car::linearHypothesis      Test Linear Hypothesis
car::outlierTest           Bonferroni Outlier Test
car::scatter3d             Three-Dimensional Scatterplots and Point
                           Identification
car::showLabels            Utility Functions to Identify and Mark Extreme
                           Points in a 2D Plot.

...

도움말의 시작 페이지는 help.start( ) 명령을 입력하여 볼 수 있다. 또한, 공식 설명서인 R 매뉴얼(http://cran.r-project.org/manuals.html)도 좋은 출발점이다. R 매뉴얼 중 <Introduction to R>은 https://homepage.usask.ca/~chl948/doc/manual/R-intro-ko.html에 한국어 번역물이 게시되어 있다. 중요 문서 중 하나니 꼭 챙겨보기 바란다.