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--- r:getting_started [2017/09/06 09:33] – [Rstudio] hkimscil
+++ r:getting_started [2021/03/02 09:48] – [A trial] hkimscil
@@ Line 24: / Line 24: @@
 ====== Rstudio ======
 [[https://www.rstudio.com/|Rstudio as a R tool]]
-[[https://www.rstudio.com/products/rstudio/download/#download|download]]
+[[https://www.rstudio.com/products/rstudio/download/#download|download]] for windows OS.
 ====== Starting R ======
@@ Line 36: / 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 122: / Line 156: @@
 [1] 8.75 5.50
 </code>
+see [[https://3months.tistory.com/97|this document]] for **trim** option
 <code> mean> mean(USArrests, trim = 0.2)
@@ Line 132: / Line 168: @@
 .42 167.60 66.20 20.16
 </code>
+see [[https://rfriend.tistory.com/40|this document]] for **colMeans** function.
 ====== Searching via Keywords ======