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--- r-tutorial [2011/10/13 00:00]
liuyipei
+++ r-tutorial [2011/10/13 00:07]
liuyipei
@@ Line 12: / Line 12: @@
 # R as a graphics tool
 # Define a vector named cars with five values
-cars <- c(1,3,6,4,9)
+my.vector <- c(1,3,6,4,9)
-# Plot the values in cars with default options
+# Some basic variables that come with R to play with
-plot(cars)
+head(cars)
+dim(cars)
-r <- rlnorm(1000)
+plot(x=cars$speed, y=cars$dist
-h <- hist(r, plot=F, breaks=c(seq(0, max(r)+1, by=0.1)))
+     main="cars",
-plot(h$counts,
+     xlab="speed",
-     log="xy",
+     ylab="dist")
-     pch=20,
+hist(cars$speed)
-     col="blue",
-     main="log-normal distribution",
-     xlab="Value",
-     ylab="Frequency")
 # Primitive data types
@@ Line 181: / Line 178: @@
 my.data <- as.matrix(read.table("http://www.stanford.edu/~kjung/my.data.txt", sep="\t"))
 # The columns of a matrix can have symbolic names

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