How to add a row to a data frame in R

Adding rows to a data frame is common when building datasets programmatically.

With dplyr

Use bind_rows() to combine data frames by rows:

library(dplyr)

df <- data.frame(name = c("Alice", "Bob"), age = c(25, 30))
new_row <- data.frame(name = "Charlie", age = 28)

df <- bind_rows(df, new_row)
#   name age
# 1 Alice  25
# 2   Bob  30
# 3 Charlie  28

With base R

Use rbind() for simple row addition:

df <- rbind(df, data.frame(name = "Diana", age = 35))

With data.table

Efficient for large datasets:

library(data.table)
dt <- data.table(name = c("Alice", "Bob"), age = c(25, 30))
dt <- rbind(dt, list(name = "Charlie", age = 28))

Performance tip

Base R rbind() copies the entire data frame each time. For many additions, collect rows in a list first, then combine once with bind_rows().

See Also

• bind_rows()
• How to combine two data frames in R