## Please note that by default the googleVis plot command
## will open a browser window and requires an internet
## connection to display the visualisation.
df <- data.frame(country=c("US", "GB", "BR"),
val1=c(1,3,4),
val2=c(23,12,32))
## Bar chart
Bar1 <- gvisBarChart(df, xvar="country", yvar=c("val1", "val2"))
plot(Bar1)
## Stacked bar chart
Bar2 <- gvisBarChart(df, xvar="country", yvar=c("val1", "val2"),
options=list(isStacked=TRUE))
plot(Bar2)
## Add a customised title and change width of bars
Bar3 <- gvisBarChart(df, xvar="country", yvar=c("val1", "val2"),
options=list(title="Hello World",
titleTextStyle="{color:'red',fontName:'Courier',fontSize:16}",
bar="{groupWidth:'100%'}"))
plot(Bar3)
if (FALSE) {
## Change x-axis to percentages
Bar4 <- gvisBarChart(df, xvar="country", yvar=c("val1", "val2"),
options=list(hAxis="{format:'#,###%'}"))
plot(Bar4)
## The following example reads data from a Wikipedia table and displays
## the information in a bar chart.
## We use the readHMLTable function of the XML package to get the data
library(XML)
## Get the data of the biggest ISO container companies from Wikipedia
##(table 3):
df=readHTMLTable(readLines("https://en.wikipedia.org/wiki/Intermodal_freight_transport"))[[3]][,1:2]
## Rename the second column
names(df)[2]="TEU capacity"
## The numbers are displayed with commas to separate thousands, so let's
## get rid of them:
df[,2]=as.numeric(gsub(",", "", as.character(df[,2])))
## Finally we can create a nice bar chart:
Bar5 <- gvisBarChart(df, options=list(
chartArea="{left:250,top:50,width:\"50%\",height:\"75%\"}",
legend="bottom",
title="Top 20 container shipping companies in order of TEU capacity"))
plot(Bar5)
}
Run the code above in your browser using DataLab