finished with the "R introduction" on r-tutor.com

.Rhistory

@@ -114,3 +114,33 @@ head(mtcars)
 q()
 s
 q()
+mtcars[[[9]]
+mtcars[[9]]
+mtcars[["am]]
+mtcars[["am"]]
+mtcars$am
+mtcars[1]
+head(mtcars[1])
+mtcars["mpg"]
+mtcars[c("mpg", "hp")]
+mtcars[c("mpg", "hp")][1]
+mtcars[c("mpg", "hp")][[1]]
+mtcars[24,]
+mtcars["Camaro Z28",]
+mtcars[c("Datsun 710", "Camaro Z28")]
+mtcars[c("Datsun 710", "Camaro Z28",)]
+mtcars[c("Datsun 710", "Camaro Z28"),]
+L = mtcars$am == 0
+L
+mtcars[L,]
+mtcars[L,]
+mtcars[L,]$mpg
+library(gdata)
+library(foreign)
+help(read.mtp)
+mydata = read.table("mydata.txt")
+mydata
+mydata = read.csv("mydata.csv")
+mydata
+getwd()
+q()

mydata.csv

@@ -0,0 +1,4 @@
+Col1,Col2,Col3
+100,a1,b1
+200,a2,b2
+300,a3,b3

mydata.txt

@@ -0,0 +1,4 @@
+100    a1    b1
+200    a2    b2
+300    a3    b3
+400    a4    b4