Fix rbind Error in R: Mismatched Columns

When using the rbind function to merge data frames, a common mistake may be mismatched numbers of columns in the data frames. The way to solve this problem is to ensure that the data frames being merged have the same column names and number of columns. If the column names do not match, you can use the colnames() function to unify the column names; if the number of columns do not match, you can use the cbind() function to add empty columns or delete extra columns. Additionally, you can check for missing or illegal values in the data frames to ensure data integrity and consistency. Finally, you can consult the help documentation of the rbind function to confirm the usage and restrictions of the parameters. If none of the above methods solve the problem, you can try using other functions for merging data frames, such as merge() or the bind_rows() function in the dplyr package.