R Markdown Introduction
Yan Liu
May 22, 2017
Set up the size of plots in the output
A few additional options: warning=FALSE and message=FALSE suppress any R warnings or messages from being included in the final document; fig.width=5, fig.height=4) set up the size of plots.
VI. Import data and summarize data
tips <- read.csv("http://www.ggobi.org/book/data/tips.csv")
library(knitr)
kable(summary(tips))| obs | totbill | tip | sex | smoker | day | time | size | |
|---|---|---|---|---|---|---|---|---|
| Min. : 1.00 | Min. : 3.07 | Min. : 1.000 | F: 87 | No :151 | Fri:19 | Day : 68 | Min. :1.00 | |
| 1st Qu.: 61.75 | 1st Qu.:13.35 | 1st Qu.: 2.000 | M:157 | Yes: 93 | Sat:87 | Night:176 | 1st Qu.:2.00 | |
| Median :122.50 | Median :17.80 | Median : 2.900 | NA | NA | Sun:76 | NA | Median :2.00 | |
| Mean :122.50 | Mean :19.79 | Mean : 2.998 | NA | NA | Thu:62 | NA | Mean :2.57 | |
| 3rd Qu.:183.25 | 3rd Qu.:24.13 | 3rd Qu.: 3.562 | NA | NA | NA | NA | 3rd Qu.:3.00 | |
| Max. :244.00 | Max. :50.81 | Max. :10.000 | NA | NA | NA | NA | Max. :6.00 |
VII. Including Plots
You can also embed plots, for example:
library(ggplot2)
p<-ggplot(data=tips,aes(smoker,fill=time))
p + geom_bar(width=0.5)
Note that the echo = FALSE can be added to the code chunk to prevent printing of the R code.