R : Compute the mean of each column of dataframe

Question

I want to find the mean and median value of each column in an R dataframe. Instead of looping over columns, is there any pandas-type function to get the summary of the data?

Answer 1

The summary() function summarizes the values in each column of the dataframe. It returns min, max, mean, median by column. You can use it.

Here is an example:

> x=c(1,2,3,4,5,6,7)
> y=c(11,12,13,14,15,16,17)
> df = data.frame(x=x, y=y)
> df
  x  y
1 1 11
2 2 12
3 3 13
4 4 14
5 5 15
6 6 16
7 7 17
> summary(df)
       x             y       
 Min.   :1.0   Min.   :11.0  
 1st Qu.:2.5   1st Qu.:12.5  
 Median :4.0   Median :14.0  
 Mean   :4.0   Mean   :14.0  
 3rd Qu.:5.5   3rd Qu.:15.5  
 Max.   :7.0   Max.   :17.0