我在学习R,想绘制一个大型数据框(~55000行)的散点图。我使用的是scatterplot
在car
:如何在R中绘制分层散点图?
library(car)
d=read.csv("patches.csv", header=T)
scatterplot(energy ~ homogenity | label, data=d,
ylab="energy", xlab="homogenity ",
main="Scatter Plot",
labels=row.names(d))
其中patches.csv
包含数据帧(下)
我想以不同的方式显示两个label
套。有了大量的数据,情节非常密集,所以我得到了正确的结果(主要是红色数据可见)。图像需要一段时间才能渲染,因此我可以在最后一个图中隐藏黑色标记数据之前(左下角)。
我可以控制R键用红色第一绘制数据,或者是有没有更好的方式来实现我的目标?
这里是我的数据样本:
label,channel,x,y,contrast,energy,entropy,homogenity
1,21,460,76,0.991667,0.640399,0.421422,0.939831
1,22,460,76,0.0833333,0.62375,0.364379,0.969445
1,23,460,76,0.129167,0.422908,0.589938,0.935417
1,24,460,76,0,1,0,1
1,25,460,76,0,1,0,1
1,26,460,76,0.0875,0.789627,0.253649,0.967361
1,27,460,76,2.4,0.528516,0.700859,0.845558
1,28,460,76,0.120833,0.562066,0.392998,0.945139
1,29,460,76,0.0125,0.975234,0.0329461,0.99375
1,30,460,76,0,1,0,1
1,31,460,76,0.1625,0.384662,0.5859,0.929861
0,0,483,82,0.404167,0.309505,0.61573,0.947222
0,1,483,82,0.0166667,0.728559,0.221967,0.991667
0,2,483,82,0,1,0,1
0,3,483,82,0.416667,0.327083,0.644057,0.940972
0,4,483,82,0.0208333,0.919054,0.0940364,0.989583
0,5,483,82,0.416667,0.327083,0.644057,0.940972
0,6,483,82,0,1,0,1
0,7,483,82,0.0333333,0.794479,0.192471,0.983333
0,8,483,82,0,1,0,1
0,9,483,82,0,1,0,1
0,10,483,82,0.0208333,0.958984,0.0502502,0.989583
您是否尝试过半透明颜色?这是_overplotting_的一个常见方法:我认为'car :: scatterplot'的参数是'col = adjustcolor(palette()[1:2],.5)'。 – lukeA
尝试使用'ggplot',看看'geom_point(...,alpha = 0.3)',也许'facet_grid()'。 – zx8754