# Harmonic Mean in R (Harmonic mean of column in R)

Harmonic mean of the column in R is calculated using harmonic.mean() function of the psych package. Let’s see how to calculate the harmonic mean of the dataframe in R and harmonic mean of the vector with an example of each.

Let’s first create the dataframe

```install.packages("psych")
library(psych)

df1 = data.frame(Name = c('George','Andrea', 'Micheal','Maggie','Ravi','Xien','Jalpa'),
Mathematics_score=c(45,78,44,89,66,49,72),
Science_score=c(56,52,45,88,33,90,47))

```

So the resultant dataframe will be #### Harmonic mean of the column in R:

Harmonic mean of the Mathematics_score is calculated as shown below

```  harmonic.mean(df1\$Mathematics_score,na.rm=TRUE)

```

So the Harmonic mean of the column will be

 59.09441

#### Harmonic mean of the vector in R:

```vector1 <- c(50,47,45,89,66,49,72)  # create vector
harmonic.mean(vector1,na.rm=TRUE)

```

So the Harmonic mean of the vector will be,

 56.36827

## Author

• With close to 10 years on Experience in data science and machine learning Have extensively worked on programming languages like R, Python (Pandas), SAS, Pyspark.