用ggplot绘制多个数据集 [英] Plot multiple datasets with ggplot

问题描述

我想在同一张图中绘制两组不同的点:A = [1 2; 3 4]和B = [1 3; 2 4].我需要存储图，所以我的想法是先使用myPlot <- qplot，然后使用ggsave.

I want to plot, in the same graph, two different sets of points: A = [1 2; 3 4] and B = [1 3; 2 4]. I need to store the plot, so my idea is to use myPlot <- qplot followed by ggsave.

使用这种方法，如何在不出现错误formal argument "data" matched by multiple actual arguments的情况下绘制多个数据集?

With such an approach, how can I plot multiple datasets without getting the error formal argument "data" matched by multiple actual arguments?

这是我现在使用的代码:

Here is the code I am using now:

yPlot <- qplot(A[,1], A[,2], data = A[1:2], geom="point",
                B[,1], B[,2], data = B[1:2], geom="point") + xlim(0, 10) 
ggsave(filename="Plot.jpg", plot=myPlot, width = 12, height = 8)

推荐答案

以下是在同一图中绘制两个数据框的模板:

Here's a template for plotting two data frame in the same figure:

A = data.frame(x = rnorm(10),y=rnorm(10))
B = data.frame(x = rnorm(10),y=rnorm(10))
ggplot(A,aes(x,y)) +geom_point() +geom_point(data=B,colour='red') + xlim(0, 10) 

或等效地:

qplot(x,y,data=A)  +geom_point(data=B,colour='red') + xlim(0, 10) 

如果要并排绘制图形，请参见?par并查找"mfcol"和"mfrow"的描述

If you want to plot to figures side by side, see ?par and look for the descriptions of 'mfcol' and 'mfrow'

除ggsave外，请参见?pdf.

In addition to ggsave, see ?pdf.

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