CW02625

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:

library("ggplot2")
ggplot2::mpg 

## # A tibble: 234 × 11
##    manufacturer model      displ  year   cyl trans drv     cty   hwy fl    class
##    <chr>        <chr>      <dbl> <int> <int> <chr> <chr> <int> <int> <chr> <chr>
##  1 audi         a4           1.8  1999     4 auto… f        18    29 p     comp…
##  2 audi         a4           1.8  1999     4 manu… f        21    29 p     comp…
##  3 audi         a4           2    2008     4 manu… f        20    31 p     comp…
##  4 audi         a4           2    2008     4 auto… f        21    30 p     comp…
##  5 audi         a4           2.8  1999     6 auto… f        16    26 p     comp…
##  6 audi         a4           2.8  1999     6 manu… f        18    26 p     comp…
##  7 audi         a4           3.1  2008     6 auto… f        18    27 p     comp…
##  8 audi         a4 quattro   1.8  1999     4 manu… 4        18    26 p     comp…
##  9 audi         a4 quattro   1.8  1999     4 auto… 4        16    25 p     comp…
## 10 audi         a4 quattro   2    2008     4 manu… 4        20    28 p     comp…
## # ℹ 224 more rows

ggplot(data = mpg)+ geom_point(mapping = aes(x = displ, y = hwy)) 

ggplot(data = mpg)+ geom_point(mapping = aes(x = displ, y = cty))

ggplot(data = mpg)+ geom_point(mapping = aes(x = displ, y = hwy, color = class))

ggplot(data = mpg)+ geom_point(mapping = aes(x = displ, y = hwy, color = manufacturer))

ggplot(data = mpg)+ geom_point(mapping = aes(x = displ, y = hwy, size = manufacturer))

## Warning: Using size for a discrete variable is not advised.

ggplot(data = mpg)+ geom_point(mapping = aes(x = displ, y = hwy, alpha = manufacturer))

## Warning: Using alpha for a discrete variable is not advised.

ggplot(data = mpg)+ geom_point(mapping = aes(x = displ, y = hwy, alpha = manufacturer), color = "blue")

## Warning: Using alpha for a discrete variable is not advised.

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.