ggplot2是R中新颖的数据可视化包,这得益于Leland Wilkinson在他的著作《The Grammar of Graphics》中提出了一套图形语法,把图形元素抽象成可以自由组合的成分,Hadley Wickham把这套想法在R中实现。 1. How to use qplot 函数qplot()是ggplot2中十分常用的函数,使用它可以绘制丰富多彩的图形,
在上面的例子中,各种属性映射由ggplot函数执行,只需要加一个图层,使用geom_point()告诉ggplot要画散点,于是所有的属性都映射到散点上。 geom_point()完成的就是几何对象的映射,ggplot2提供了各种几何对象映射,如geom_histogram用于直方图,geom_bar用于画柱状图,geom_boxplot用于画箱式图等等。 不同的几何对象,要求的...
The goal of this article is to describe how to change the color of a graph generated using R software and ggplot2 package. A color can be specified either by name (e.g.: “red”) or by hexadecimal code (e.g. : “#FF1234”). The different color systems available in R are describe...
This article illustrates how todeal with the ggplot2 error “Don’t know how to automatically pick scale for object type”inR. The tutorial contains this information: 1)Example Data & Add-On Packages 2)Example 1: Reproduce the ggplot2 Error – automatically pick scale for object of type stan...
In order to use the functions of the ggplot2 and ggvenn add-on packages, we need to install and load the two packages in R: install.packages("ggplot2")# Install & load ggplot2 packagelibrary("ggplot2")install.packages("ggvenn")# Install & load ggvennlibrary("ggvenn") ...
To make blackboard.jpg the background image, we need to combine the annotation_custom-function of the ggplot2 package and the rasterGrob-function of the grid package. ggplot(mydata, aes(cut, price, fill = -price)) + ggtitle("Bar chart with background image") + scale_fill_continuous(...
Add Labels and Titles Using Labs Next, we add titles and labels to our graph using the labs() function. We set the x, y, and title attributes to our desired labels. ggplot(data = home_data, aes(x = price)) + geom_histogram() + labs(x ='Price (USD)', y='Number of Listings...
Let’s load ggplot2 for graph generation library(ggplot2) library(dplyr) ggplot(df, aes(x = x, next_x = next_x, node = node, next_node = next_node, fill = factor(node))) + geom_sankey() + theme_sankey(base_size = 16) How to add labels in Sankey Plot The package’s geom_...
I consider ggplot2 to be nothing short of a revolution in R graphics. I simply haven't found anything like this package for quickly and elegantly producing usable graphics. I covered the quick and dirty basics of ggplot2 in a previous post. Now I...
To create a histogram in R, use ggplot2 If you need to create a histogram in R, Istronglyrecommend that you use ggplot2 instead. ggplot2 is a powerful plotting library that gives you great control over the look and layout of the plot. ...