R Cheat Sheets (Page 4 of 4) in pdf

R Cheat Sheets Page 4

Plotting

plot(ts)

R base plot function

title(main, sub, xlab, ylab)

Adds labels to the currently open plot

Aside from the built in plotting function in R, ggplot2 is a very powerful plotting package.

See

for complete documentation.

ggplot()

Creates a ggplot object

aes()

Creates a properly formatted list of variables for use in ggplot

geom_line()

Plots data with a line connecting them

geom_boxplot()

Plots data in the form of box and whiskers plot

xlab()

Edit the x axis label

ylab()

Edit the y axis label

ggtitle()

Edit the plot title

theme()

Modify a large number of options for the plot from grid elements to colors

Plotting example with ggplot2

library(Quandl)

library(ggplot2)

data_series

Quandl(“GOOG/NASDAQ_AAPL”,

start_date=”2005-01-01”)[,c(1,5)]

my.plot

<- ggplot(data=data_series, aes(x=Date, y=Close)) +

geom_line(color=”#FAB521”) +

# Adding a colored line

theme(panel.background =

element_rect(fill=’#393939’),

panel.grid.major.x =

element_blank(),

panel.grid.major.y =

element_line(colour=’white’, size=0.1),

panel.grid.minor =

element_line(colour=’white’, size=0.1)) +

# modifying background color

# and grid options

xlab(“Date”) +

ylab(“Closing

Price”) + ggtitle(“AAPL”)

# Adding titles

my.plot

# Generates the plot

R Cheat Sheets Page 4

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