Add title, subtitle and caption # Default plotlibrary(ggplot2) p <- ggplot(ToothGrowth, aes(x = factor(dose), y = len)) + geom_boxplot() print(p)# Add titlesp <- p + labs(title ="Effect of Vitamin C on Tooth Gr
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,并且通常只需要一行代码可...
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...
How to Make a Histogram with ggplot2 Now we can create the histogram. Regardless of the type of graph we are creating in ggplot2, we always start with the ggplot() function, which creates a canvas to add plot elements to. It takes two parameters. The first argument is a data frame....
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...
It’s also possible to use the functionsggtitle(),xlab()andylab()to modify the plot title, subtitle, x and y axis labels. Add a title, subtitle, caption and change axis labels: bxp <- bxp + labs(title ="Effect of Vitamin C on Tooth Growth", subtitle ="Plot of length by dose",...
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 create aggplot2visualization with a transparent background, we need to set the value of two theme elements,panel.backgroundandplot.background. We need to set theirfillandcolorproperties toNAusing theelement_rect()function, as shown in the sample code. The first plot shows the difference bet...
In the next step, we actually draw a bar chart with a backgriund image. 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...