CW12325

R Markdown

This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see http://rmarkdown.rstudio.com.

When you click the Knit button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document. You can embed an R code chunk like this:

4+ 3/5^2

## [1] 4.12

set.seed(7)
x<-rnorm(4, mean=10)
x

## [1] 12.287247  8.803228  9.305707  9.587707

s1<-sample(1:10, 5)
s1

## [1]  6  8  9  3 10

sample(1:10, 5, replace =TRUE)

## [1]  8 10  3  4  8

mean (sample(1:10, 5))

## [1] 5.6

plot(x=sample(1:10,5),y=sample(1:10,5), main= "five random points",xlab="x values", ylab="y values")

z<- 5
w <- z^2
w

## [1] 25

i <- (z * 2 + 45)/2
i

## [1] 27.5

rm(z,w,i,s1)
z <-5
w <- z^2
w

## [1] 25

max(4,5,6,12,-4)

## [1] 12

max("ab", "cd", "s")

## [1] "s"

max(sample(1:100, 30))

## [1] 100

exists("se")

## [1] FALSE

exists("mean")

## [1] TRUE

se<-function(x){
  v<-var(x)
  n<-length(x)
 return(sqrt(v/n))
}
se(c(1,2,3,4,5))

## [1] 0.7071068

f<-function(x){
    for (i in 1:10){
      res <- x*i
      cat(x, '*',i,'=',res,'\n')
    }
}
f(4)

## 4 * 1 = 4 
## 4 * 2 = 8 
## 4 * 3 = 12 
## 4 * 4 = 16 
## 4 * 5 = 20 
## 4 * 6 = 24 
## 4 * 7 = 28 
## 4 * 8 = 32 
## 4 * 9 = 36 
## 4 * 10 = 40

Including Plots

You can also embed plots, for example:

Note that the echo = FALSE parameter was added to the code chunk to prevent printing of the R code that generated the plot.