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--- r:getting_started [2016/09/07 16:20] – [Getting help] hkimscil
+++ r:getting_started [2021/03/02 09:48] – [A trial] hkimscil
@@ Line 22: / Line 22: @@
 | Suse  | R-base  |
 Use the system’s package manager to download and install the package. Normally, you will need the root password or sudo privileges; otherwise, ask a system administrator to perform the installation.
+====== Rstudio ======
+[[https://www.rstudio.com/|Rstudio as a R tool]]
+[[https://www.rstudio.com/products/rstudio/download/#download|download]] for windows OS.
 ====== Starting R ======
@@ Line 33: / Line 36: @@
 __Linux or Unix__
   * Start the R program from the shell prompt using the R command (uppercase R).
+====== A trial ======
+<code>install.packages("NRAIA")
+library(NRAIA)
+detach(package:NRAIA)
+</code>
+<code>trees
+summary(trees)
+boxplot(trees)
+pair(trees)
+</code>
+<code>cars
+plot(dist~speed, data=cars)
+m.cars <- lm(dist ~ speed, data=cars)
+m.cars
+summary(m.cars)
+</code>
+<code>chickwts
+summary(chickwts)
+boxplot(weight~feed, data=chickwts)
+anova(lm(weight~feed, data=chickwts) ## or . . .
+m.chck <- aov(weight~feed, data = chickwts)
+m.chck
+summary(m.chck)
+</code>
+----
+Not required yet.
+[[:t-test]]
+[[:ANOVA]]
+[[:Factorial ANOVA]]
+[[:correlation]]
+[[:regression]]
+[[:Multiple regression]]
+----
 ====== Entering commands ======
 <code>
@@ Line 97: / Line 134: @@
 //__Search Engine & Keywords__//
 Click here to access a simple search engine, which allows you to search the documentation by keyword or phrase. There is also a list of common keywords, organized by topic; click one to see the associated pages.
+====== Getting help from functions ======
+Use help to display the documentation for the function:
+<code> > help(functionname) </code>
+Use args for a quick reminder of the function arguments:
+<code> > args(functionname) </code>
+Use example to see examples of using the function:
+<code> > example(functionname) </code>
+<code> > help(mean) </code>
+<code> > ?mean </code>
+<code> > args(mean) </code>
+<code> > example(mean) </code>
+<code> > > example(mean)
+mean> x <- c(0:10, 50)
+mean> xm <- mean(x)
+mean> c(xm, mean(x, trim = 0.10))
+[1] 8.75 5.50
+</code>
+see [[https://3months.tistory.com/97|this document]] for **trim** option
+<code> mean> mean(USArrests, trim = 0.2)
+Murder Assault UrbanPop Rape
+.42 167.60 66.20 20.16
+</code>
+<code> mean> colMeans(USArrests)
+Murder Assault UrbanPop Rape
+.42 167.60 66.20 20.16
+</code>
+see [[https://rfriend.tistory.com/40|this document]] for **colMeans** function.
+====== Searching via Keywords ======
+<code> > help.search("pattern") </code>
+  * A typical pattern is a function name or keyword.
+  * Notice that it must be enclosed in quotation marks.
+<code> > ??pattern </code>
+<code> > help.search("social network") </code>
+====== Getting help on a package ======
+<code> > help(package="packagename") </code>
+<code> > help(package="tseries") </code>
+<code> > install.package("tseries")
+Error: could not find function "install.package"
+</code>
+<code> > install.packages("tseries")
+Installing package into ‘D:/Users/Hyo/Documents/R/win-library/3.2’
+(as ‘lib’ is unspecified)
+--- Please select a CRAN mirror for use in this session ---
+trying URL 'https://cran.ism.ac.jp/bin/windows/contrib/3.2/tseries_0.10-35.zip'
+Content type 'application/zip' length 321067 bytes (313 KB)
+downloaded 313 KB
+package ‘tseries’ successfully unpacked and MD5 sums checked
+The downloaded binary packages are in
+        C:\Users\Hyo\AppData\Local\Temp\RtmpmQCQRK\downloaded_packages
+> help(package="tseries")
+>
+</code>
+{{help.package.jpg}}
+====== Searching the Web for help ======
+<code> > RSiteSearch("ANOVA") </code>
+====== Finding Relevant Functions and Packages ======
+  * Visit the list of task views at http://cran.r-project.org/web/views/. Find and read the task view for your area, which will give you links to and descriptions of relevant packages. Or visit http://rseek.org, search by keyword, click on the Task Views tab, and select an applicable task view.
+  * Visit [[http://crantastic.org/|crantastic]] and search for packages by keyword.
+  * To find relevant functions, visit http://rseek.org, search by name or keyword, and click on the Functions tab.