The post Replace NA with Zero in R appeared first on Data Science Tutorials

Replace NA with Zero in R, Using the dplyr package in R, you can use the following syntax to replace all NA values with zero in a data frame.

Substitute zero for any NA values.

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df <- df %>% replace(is.na(.), 0)

To replace NA values in a particular column of a data frame, use the following syntax:

In column col1, replace NA values with zero.

df <- df %>% mutate(col1 = ifelse(is.na(col1), 0, col1))

Additionally, you can substitute a NA value in one of a data frame’s several columns using the following syntax.

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in columns col1 and col2, replace NA values with zero

df <- df %>% mutate(col1 = ifelse(is.na(col1), 0, col1),
                    col2 = ifelse(is.na(col2), 0, col2))

With the help of the following data frame, the following examples demonstrate how to utilize these functions in practice.

Let’s create a data frame

df <- data.frame(team = c('T1', 'T1', 'T1', 'T2', 'T2', 'T2', 'T2'),
                 position = c('R1', NA, 'R1', 'R1', 'R1', 'R1', 'R2'),
                 points = c(122, 135, 129, NA, 334, 434, 139))

Now we can view the data frame

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df
  team position points
1   T1       R1    122
2   T1     <NA>    135
3   T1       R1    129
4   T2       R1     NA
5   T2       R1    334
6   T2       R1    434
7   T2       R2    139

Example 1: Replace every NA value across all columns.

Replace all NA values across all columns of a data frame by running the code below.

library(dplyr)

Yes, now we will replace all NA values with zero

df <- df %>% replace(is.na(.), 0)

Let’s view the data frame

df
  team position points
1   T1       R1    122
2   T1        0    135
3   T1       R1    129
4   T2       R1      0
5   T2       R1    334
6   T2       R1    434
7   T2       R2    139

Example 2: In a Specific Column, Replace NA Values

The code below demonstrates how to change NA values in a particular column of a data frame.

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library(dplyr)

replace NA values with zero in position column only

df %>% mutate(position = ifelse(is.na(position), 0, position))
team position points
1   T1       R1    122
2   T1        0    135
3   T1       R1    129
4   T2       R1     NA
5   T2       R1    334
6   T2       R1    434
7   T2       R2    139

Example 3: Replace any columns with NA values.

The code that follows demonstrates how to change NA values in one of a data frame’s many columns.

library(dplyr)

Now we can replace NA values with zero in position and points columns

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df %>% mutate(position = ifelse(is.na(position), 0, position),
                    points = ifelse(is.na(points), 0, points))
   team position points
1   T1       R1    122
2   T1        0    135
3   T1       R1    129
4   T2       R1      0
5   T2       R1    334
6   T2       R1    434
7   T2       R2    139

Using the dplyr package in R, you can use the following syntax to replace all NA values with zero in a data frame.

Substitute zero for any NA values.

df <- df %>% replace(is.na(.), 0)

To replace NA values in a particular column of a data frame, use the following syntax:

In column col1, replace NA values with zero.

df <- df %>% mutate(col1 = ifelse(is.na(col1), 0, col1))

Additionally, you can substitute a NA value in one of a data frame’s several columns using the following syntax.

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in columns col1 and col2, replace NA values with zero

df <- df %>% mutate(col1 = ifelse(is.na(col1), 0, col1),
                    col2 = ifelse(is.na(col2), 0, col2))

With the help of the following data frame, the following examples demonstrate how to utilize these functions in practice:

Let’s create a data frame

df <- data.frame(team = c('T1', 'T1', 'T1', 'T2', 'T2', 'T2', 'T2'),
                 position = c('R1', NA, 'R1', 'R1', 'R1', 'R1', 'R2'),
                 points = c(122, 135, 129, NA, 334, 434, 139))

Now we can view the data frame

df
  team position points
1   T1       R1    122
2   T1     <NA>    135
3   T1       R1    129
4   T2       R1     NA
5   T2       R1    334
6   T2       R1    434
7   T2       R2    139

Example 1: Replace every NA value across all columns.

Replace all NA values across all columns of a data frame by running the code below.

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library(dplyr)

Yes, now we will replace all NA values with zero

df <- df %>% replace(is.na(.), 0)

Let’s view the data frame

df
  team position points
1   T1       R1    122
2   T1        0    135
3   T1       R1    129
4   T2       R1      0
5   T2       R1    334
6   T2       R1    434
7   T2       R2    139

Example 2: In a Specific Column, Replace NA Values

The code below demonstrates how to change NA values in a particular column of a data frame:

library(dplyr)

replace NA values with zero in position column only

df %>% mutate(position = ifelse(is.na(position), 0, position))
team position points
1   T1       R1    122
2   T1        0    135
3   T1       R1    129
4   T2       R1     NA
5   T2       R1    334
6   T2       R1    434
7   T2       R2    139

Example 3: Replace any columns with NA values.

The code that follows demonstrates how to change NA values in one of a data frame’s many columns.

library(dplyr)

Now we can replace NA values with zero in position and points columns

df %>% mutate(position = ifelse(is.na(position), 0, position),
                    points = ifelse(is.na(points), 0, points))
   team position points
1   T1       R1    122
2   T1        0    135
3   T1       R1    129
4   T2       R1      0
5   T2       R1    334
6   T2       R1    434
7   T2       R2    139

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