我想绘制拟合值的置信区间。我读了一些相关的帖子,但我仍然卡住了......这些是日期的样本:
pd <-structure(list(date = 1:5, obs = c(44.6651011845397, 62.3441339250369,
52.8968240161506, 51.7795930633478, 63.1284636561025), pred = c(47.2643891039645,
55.7996450577325, 52.9566469533233, 51.3393289316, 59.0011440099732)),
.Names = c("date", "obs", "pred"), row.names = c(NA, 5L), class = "data.frame")
pd2 <- structure(list(date = 1:5, lwr = c(44.8529592578518, 54.9926370476338,
51.7358955911624, 49.401869166722, 58.1674619447108), upr = c(49.6758189500772,
56.6066530678312, 54.1773983154842, 53.2767886964779, 59.8348260752356
)), .Names = c("date", "lwr", "upr"), row.names = c(NA, 5L), class = "data.frame")
dd <- melt(pd, id=c("date")) #Data
dd2 <- melt(pd2,id=c("date")) #Intervals of conf.
p <- ggplot(dd) + geom_line(aes(x=date, y=value, colour=variable))
p <- p + geom_smooth(aes(x=date, y=value, ymax=lwr, ymin=upr), #1 way
colour='grey', data=dd2, stat='identity')
还试过......
#p + geom_ribbon(data = dd2,aes(ymin = lwr,ymax = upr),alpha = 0.3)#2。
我收到错误:
Error in eval(expr, envir, enclos) : object 'lwr' not found
....我错过了什么?
我也尝试不使用melt
来做...但是我也遇到了传奇问题!
答案 0 :(得分:5)
在第一种方式中,您使用的dd对象没有lwr / upr列。所以你无法真实地绘制它们。
你能做一个:
dd<-merge(dd,pd2,by='date')
在熔化之后然后:
p <- ggplot(dd) + geom_line(aes(x=date, y=value, colour=variable))
p + geom_ribbon(data=dd,aes(x=date, y=value, ymin=lwr,ymax=upr, group=variable),alpha=0.3)
这有帮助吗?