Introduction

The error in rbinddeparselevel numbers of columns of arguments do not match indicates that the number of columns in the data frame being bound does not match the number of columns in the data frame to which it is being bound. This can happen when you are trying to bind two data frames that have different structures, such as when one data frame has more columns than the other.

This error can also occur when you are trying to bind together data frames that have different column names. In order to bind two data frames together, they must have the same column names. You can check the column names of a data frame using the colnames() function.

If you are trying to bind together data frames that do not have the same column names, you will need to either change the column names of one of the data frames so that they match, or use the map2() function from the purrr package to specify how each column should be bound.

What is the error?

The error message “error in rbinddeparselevel numbers of columns of arguments do not match” generally indicates that the user has attempted to use the rbind() function on two data sets that have different numbers of columns. In order to use rbind(), both data sets must have the same number of columns.

How to fix it?

This error can occur when you are trying to combine dataframes that do not have the same number of columns. For example,

df1 <- data.frame(x = c(1,2,3), y = c(“a”,”b”,”c”))
df2 <- data.frame(x = c(4,5,6), y = c(“d”,”e”,”f”), z = c(7,8,9))

rbind(df1, df2) # error!
To fix it, you can either add empty columns to one of the dataframes so that they have the same number of columns:

Add empty column to df1

df1$z <- NA
rbind(df1, df2)

x y z
1 1 a NA
2 2 b NA
3 3 c NA
4 4 d 7
5 5 e 8
6 6 f 9

Or remove extra columns from one of the dataframes:

# Remove column from df2
df2 <- df2[ , -3] # or drop=TRUE in newer versions of R (>= 3.0.0)

rbind(df1, df2)

x y x y
1 1 a 4 d
2 2 b 5 e ## Warning message: In rbinddeparselevel > 0 && l == nl : number of columns of arguments do not match

Conclusion

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