r - 如何更改简单格子图中面板的顺序

Question

您好我正在使用以下代码使用 lattice 生成 xyplot

xyplot(Rate~Weight|Temp, groups=Week, rate,
 pch=c(15,16,17,3), col=c("blue","red","green","purple"),
 as.table=TRUE,
 xlab="Weight (gr)", ylab="Rate (umol/L*gr)",
 main="All individuals and Treatments at all times",
 strip=strip.custom(strip.names=1),
 key=
 list(text=list(c("Week","1","2","6","8")),
 points=list(pch=c(NA,15,16,17,3),col=c(NA,"blue","red","green","purple")),
 space="right")
 )

这给了我以下情节：

现在按照建议更改代码以包含面板顺序后：

xyplot(Rate~Weight|Temp, groups=Week, rate,
 index.cond=list(c(4,1,2,3)),#this provides the order of the panels
 pch=c(15,16,17,3), col=c("blue","red","green","purple"),
 as.table=TRUE,
 xlab="Weight (gr)", ylab="Rate (umol/L*gr)",
 main="All individuals and Treatments at all times",
 strip=strip.custom(strip.names=1),
 key=
 list(text=list(c("Week","1","2","6","8")),
 points=list(pch=c(NA,15,16,17,3),col=c(NA,"blue","red","green","purple")),
 space="right")
 )

我们得到正确的顺序

谢谢您的帮助

Answer 1

我转换Temp为因子并得到了这个：

您可以像这样调整因子顺序：

levels(rate$Temp) <- c("12", "9", "18", "15") #custom factor order