How to Fix: could not find function “%>%” in R

In this article, we are going to see how to fix, could not find function “%>%” in R Programming Language. The pipe operator %>% was introduced to decrease time and to improve the readability and maintainability of code. This error can occur while don’t have loaded or installed the R package.

Method 1: Using magrittr packages

Producing the Error

To reproduce the error message “could not find function “%>%”” in the R. For the example, Here we are using the “%>%” operator to get a sum of sqrt.

R

1:8 %>% sum %>% sqrt

Output:

Error in 1:8 %>% sum %>% sqrt: could not find function "%>%"
Traceback:

How to fix

It can be only fixed using related packages(magrittr)

R

library("magrittr")
1:8 %>% sum %>% sqrt

Output:

6

Method 2: Using dplyr Package

Producing the Error

To reproduce the error message “could not find function “%>%”” in the R. For the example, Here we are using the “%>%” operator to group_by() function followed by summarise() function with an appropriate action to perform.

R

# create data frame
df <- data.frame(Sub = c('Math', 'Math', 'Phy',
                         'Phy', 'Phy', 'Che', 'Che'),
                 Marks = c(8, 2, 4, 9, 9, 7, 1),
                 Add_on = c(3, 1, 9, 4, 7, 8, 2))

# Specify data frame
df %>%
  # Specify group indicator
  group_by(Sub) %>%

  # Specify column
  summarise_at(vars(Marks),
               list(name = sum))

Output:

Error in df %>% group_by(Sub) %>% summarise_at(vars(Marks), list(name = sum)): could not find function “%>%”

How to fix

It can be only fixed using related packages(dplyr)

R

# create data frame
df <- data.frame(Sub = c('Math', 'Math', 'Phy',
                         'Phy', 'Phy', 'Che', 'Che'),
                 Marks = c(8, 2, 4, 9, 9, 7, 1),
                 Add_on = c(3, 1, 9, 4, 7, 8, 2))

library(dplyr)
df %>%
  group_by(Sub) %>%
  summarise_at(vars(Marks),
               list(name = sum))

Output:

Sub name
Che 8
Math 10
Phy 22