r - 更改自动绘图的轴标题

Question

使用autoplotfromggfortify创建诊断图：

library(ggplot2)
library(ggfortify)

mod <- lm(Petal.Width ~ Petal.Length, data = iris)
autoplot(mod, label.size = 3)

是否可以（轻松）更改轴和绘图标题？我想翻译它们。

Answer 1

该函数autoplot.lm返回一个 S4 对象（ggmultiplot 类，请参阅 参考资料?`ggmultiplot-class`）。如果您查看帮助文件，您会发现它们具有用于各个图的替换方法。这意味着您可以提取单个图，对其进行修改，然后将其放回原处。例如：

library(ggplot2)
library(ggfortify)

mod <- lm(Petal.Width ~ Petal.Length, data = iris)
g <- autoplot(mod, label.size = 3) # store the ggmultiplot object

# new x and y labels
xLabs <- yLabs <- c("a", "b", "c", "d")

# loop over all plots and modify each individually
for (i in 1:4)
    g[i] <- g[i] + xlab(xLabs[i]) + ylab(yLabs[i])

# display the new plot
print(g) 

在这里，我只修改了轴标签，但您可以单独更改有关图的任何内容（主题、颜色、标题、大小）。

Answer 2

@user20650 提出的解决方案既有趣又优雅。

这是一个不太优雅的解决方案myautoplot，它基于autoplot. 我希望它可以帮助你。在此处
下载该myautoplot功能并将其保存在您的工作目录中，名称为. 然后，使用以下代码：myautoplot.r

library(ggplot2)
library(ggfortify)

source("myautoplot.r")
mod <- lm(Petal.Width ~ Petal.Length, data = iris)

####
# Define x-labels, y-labels and titles
####
# Residuals vs Fitted Plot
xlab_resfit <- "Xlab ResFit"
ylab_resfit <- "Ylab ResFit"
title_resfit <- "Title ResFit"

# Normal Q-Q Plot
xlab_qqplot <- "Xlab QQ"
ylab_qqplot <- "Ylab QQ"
title_qqplot <- "Title QQ"

# Scale-Location Plot
xlab_scaleloc <- "Xlab S-L"
ylab_scaleloc <- "Ylab S-L"
title_scaleloc <- "Title S-L"

# Cook's distance Plot
xlab_cook <- "Xlab Cook"
ylab_cook <- "Ylab Cook"
title_cook <- "Title Cook"

# Residuals vs Leverage Plot
xlab_reslev <- "Xlab Res-Lev"
ylab_reslev <- "Ylab Res-Lev"
title_reslev <- "Title Res-Lev"

# Cook's dist vs Leverage Plot
xlab_cooklev <- "Xlab Cook-Lev"
ylab_cooklev <- "Ylab Cook-Lev"
title_cooklev <- "Title Cook-Lev"

# Collect axis labels and titles in 3 lists    
xlab_list <- list(resfit=xlab_resfit, qqplot=xlab_qqplot, 
      scaleloc=xlab_scaleloc, cook=xlab_cook, reslev=xlab_reslev,
      cooklev=xlab_cooklev)
ylab_list <- list(resfit=ylab_resfit, qqplot=ylab_qqplot, 
      scaleloc=ylab_scaleloc, cook=ylab_cook, reslev=ylab_reslev,
      cooklev=ylab_cooklev)
title_list <- list(resfit=title_resfit, qqplot=title_qqplot, 
      scaleloc=title_scaleloc, cook=title_cook, reslev=title_reslev,
      cooklev=title_cooklev)

# Pass the lists of axis labels and title to myautoplot
myautoplot(mod, which=1:6, xlab=xlab_list, 
                           ylab=ylab_list, 
                           title=title_list)

Answer 3

library(ggplot2)
library(ggfortify)

mod <- lm(Petal.Width ~ Petal.Length, data = iris)
autoplot(mod,which=c(1:6), ncols=2)    #total 6 plots in two columns
#change axes label & title of plot 1. similarly by changing 'which' parameters count you can label other plots.
autoplot(mod,which=1) + 
  labs(x="x-axis label of fig1", y="y-axis label of fig1", title="Fig1 plot")

请不要忘记让我们知道它是否有帮助:)