To add new column to data frame in R, you can use two different methods.

The following methods show how you can do it with syntax.

Method 1: Use $ Operator

df$new_column <- c(value1,value2,value3,....)

Method 2: Use cbind() Function

df <- cbind(df,new_column = c(value1,value2,value3,....))

Let’s first create data frame using data.frame() function:

# Create data frame
df <- data.frame(Start_date=as.Date(c("2000-05-21","1998-03-28","2001-01-19","2003-04-27","2004-11-26","2008-11-25")),
                 Machine_name = c("Machine1","Machine2","Machine3","Machine4","Machine5","Machine6"),
                 Value = c(108,120,135,95,98,105),Reading= c(110,97,91,89,80,85))

# Print data frame
print(df)

Output:

  Start_date Machine_name Value Reading
1 2000-05-21     Machine1   108     110
2 1998-03-28     Machine2   120      97
3 2001-01-19     Machine3   135      91
4 2003-04-27     Machine4    95      89
5 2004-11-26     Machine5    98      80
6 2008-11-25     Machine6   105      85

The output shows data frame that we created in above code.

The following examples show how to add new column to data frame in R.

Use $ Operator to Add Column to Dataframe

Let’s see how we can add new column to data frame:

# Create data frame
df <- data.frame(Start_date=as.Date(c("2000-05-21","1998-03-28","2001-01-19","2003-04-27","2004-11-26","2008-11-25")),
                 Machine_name = c("Machine1","Machine2","Machine3","Machine4","Machine5","Machine6"),
                 Value = c(108,120,135,95,98,105),Reading= c(110,97,91,89,80,85))

# Add new column to data frame
df$Working <- c(TRUE,TRUE,FALSE,FALSE,TRUE,FALSE)

# Print data frame 
print(df)

Output:

  Start_date Machine_name Value Reading Working
1 2000-05-21     Machine1   108     110    TRUE
2 1998-03-28     Machine2   120      97    TRUE
3 2001-01-19     Machine3   135      91   FALSE
4 2003-04-27     Machine4    95      89   FALSE
5 2004-11-26     Machine5    98      80    TRUE
6 2008-11-25     Machine6   105      85   FALSE

As the output shows data frame which having new column added to it.

Use cbind() Function to Add New Column to Dataframe

You can use cbind() function to add new column to data frame in R:

# Create data frame
df <- data.frame(Start_date=as.Date(c("2000-05-21","1998-03-28","2001-01-19","2003-04-27","2004-11-26","2008-11-25")),
                 Machine_name = c("Machine1","Machine2","Machine3","Machine4","Machine5","Machine6"),
                 Value = c(108,120,135,95,98,105),Reading= c(110,97,91,89,80,85))

# Add new column to data frame
df <- cbind(df,Working = c(TRUE,TRUE,FALSE,FALSE,TRUE,FALSE))

# Print data frame 
print(df)

Output:

  Start_date Machine_name Value Reading Working
1 2000-05-21     Machine1   108     110    TRUE
2 1998-03-28     Machine2   120      97    TRUE
3 2001-01-19     Machine3   135      91   FALSE
4 2003-04-27     Machine4    95      89   FALSE
5 2004-11-26     Machine5    98      80    TRUE
6 2008-11-25     Machine6   105      85   FALSE

As the output shows data frame with newly added column to it.