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如何添加尊重另一列的黃土平滑作爲重量?如何在ggplot2中繪製加權黃土平滑?
比方說,我有以下data.frame:
library(ggplot2)
df <- data.frame(x=seq(1:21))
df$y <- df$x*0.3 + 10
df$weight <- 10
df[6,] <- c(6, 0.1, 1)
df[7,] <- c(7, 0.1, 1)
df[13,] <- c(13, 0.1, 1)
df[14,] <- c(14, 0.1, 1)
df[20,] <- c(20, 0.1, 1)
df[21,] <- c(21, 0.1, 1)
ggplot(data=df, aes(x=x, y=y, size=weight)) + geom_point() + geom_smooth(method=loess, legend=FALSE)
繪製黃土平滑帶來了以下內容:
但我想用列權重,使得黃土是相同的,如果每個重量10的點是10倍存在的:
df2 <- subset(df, !(x %in% c(6,7,13,14,20,21)))
df2$weight <- 1
df3 <- df2
for(i in seq(1:9)){
df3 <- rbind(df3, df2)
}
df3 <- rbind(df3, c(6, 0.1, 1))
df3 <- rbind(df3, c(7, 0.1, 1))
df3 <- rbind(df3, c(13, 0.1, 1))
df3 <- rbind(df3, c(14, 0.1, 1))
df3 <- rbind(df3, c(20, 0.1, 1))
df3 <- rbind(df3, c(21, 0.1, 1))
ggplot(data=df3, aes(x=x, y=y)) + geom_point() + geom_smooth(method=loess, legend=FALSE)
# or to demonstrate
ggplot(data=df3, aes(x=x, y=y)) + geom_jitter() + geom_smooth(method=loess, legend=FALSE)
我發現了函數黃土的參數權重。但我不知道如何從geom_smooth()調用它。
看到這裏最好的答案:HTTP://stackoverflow.com/questions/13904788/how-to-權重平滑的任意因子在ggplot2 – zuuz