[英]How to display a series of plots in R based on a variable taking values from sequence?
[英]Converting a series of plots into an animated sequence in R
嗨,我有以下代碼可用來使用MASS包查看協方差矩陣的行為
library(MASS)
library(ggplot2)
for(x in 0:100){
mycor = x/100
mydist = mvrnorm(100, c(5,10), matrix(c(1,mycor,mycor,1), 2),
empirical=TRUE)
md = data.frame(mydist)
colnames(md)= c('x','y')
graph = ggplot(md, aes(x,y)) + geom_point() +
stat_smooth(method='lm',color='red') +
stat_smooth(method='loess',se=FALSE,color='blue')
print(graph)
Sys.sleep(0.05)
}
如果可以將快照轉換為動畫序列,那就太好了。 有什么辦法可以用R做到這一點嗎?
謝謝
好吧,首先安裝imagemagick,它的小號和ez號。 然后,您可以執行以下操作:
## Make a directory to store pngs temp
dir.create("~/example")
setwd("~/example")
for(x in 0:100){
mycor = x/100
mydist = mvrnorm(100, c(5,10), matrix(c(1,mycor,mycor,1), 2),
empirical=TRUE)
md = data.frame(mydist)
colnames(md)= c('x','y')
graph = ggplot(md, aes(x,y)) + geom_point() +
stat_smooth(method='lm',color='red') +
stat_smooth(method='loess',se=FALSE,color='blue')
ggsave(filename = sprintf("%02d.png", x))
## print(graph)
## Sys.sleep(0.05)
}
最后一步只是將.gif從所有.png中分離出來,然后將其刪除。 這些命令通過命令行發送到imagemagick。
## Not sure if you on Linux or windows
dev.off()
if (Sys.info()[['sysname']] == "Linux") {
system("convert -delay 80 *.png example.gif")
} else { shell('"convert -delay 80 *.png example.gif"') }
file.remove(list.files(path = "~/example/", pattern=".png"))
動畫包提供了許多使此操作變得容易的功能。 (包括imagemagick的包裝器)。
您的示例,使用SciAnimator庫創建HTML文件
library(animation)
saveHTML({
for(x in 0:100){
mycor = x/100
mydist = mvrnorm(100, c(5,10), matrix(c(1,mycor,mycor,1), 2),
empirical=TRUE)
md = data.frame(mydist)
colnames(md)= c('x','y')
graph = ggplot(md, aes(x,y)) + geom_point() +
stat_smooth(method='lm',color='red') +
stat_smooth(method='loess',se=FALSE,color='blue')
print(graph)
}
}, img.name = "cor_plot", imgdir = "cor_dir", htmlfile = "cor.html", autobrowse = FALSE, outdir = getwd())
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