grid.arrange函数调用是否正确？代码报错‘找不到该函数’求助

Your grid.arrange(hist1, hist2, nrow = 2) call is syntactically correct! That’s exactly how you’d arrange two plots (like your histograms hist1 and hist2) into a 2-row vertical layout using this function.

The error you’re seeing has nothing to do with your code’s structure—it means the grid.arrange function isn’t accessible in your current R session. This function isn’t included in base R; it’s part of the gridExtra package. Here’s how to fix this:

• First, install the gridExtra package (you only need to do this once on your system):

  install.packages("gridExtra")
  

• Next, load the package into your session every time you start R and want to use grid.arrange:

  library(gridExtra)
  

• After loading the package, your original code will run without errors:

  grid.arrange(hist1, hist2, nrow = 2)
  

As a side note, if you’re working with ggplot2 plots, you might also consider the patchwork package for a more intuitive plot-combining syntax, but gridExtra is a reliable choice for this task.

Content of the question originates from Stack Exchange, asked by Fatty Acids.