# How to find the minimum and maximum of columns values in an R data frame?

The range function in R provides the minimum and maximum values instead of the difference between the two. Hence, we can find the minimum and maximum by using range function but for a data frame we cannot use it directly. Check out the below examples to understand how it works.

## Example1

Live Demo

> set.seed(974)
> x1<-rpois(20,2)
> x2<-rpois(20,5)
> x3<-rpois(20,10)
> df1<-data.frame(x1,x2,x3)
> df1

## Output

 x1 x2 x3
1 0 6 10
2 0 7 10
3 3 3 11
4 2 7 9
5 3 2 5
6 3 4 7
7 2 7 7
8 2 8 5
9 0 4 9
10 2 2 11
11 4 7 9
12 3 9 9
13 1 2 13
14 0 1 6
15 0 4 10
16 2 3 8
17 0 8 14
18 3 5 13
19 1 4 5
20 4 5 8

Finding minimum and maximum values for columns in df1:

## Example

> t(sapply(df1,range))

## Output

 [,1] [,2]
x1 0    4
x2 1    9
x3 5   14

## Example2

Live Demo

> y1<-sample(21:50,20)
> y2<-sample(21:50,20)
> y3<-sample(21:50,20)
> y4<-sample(21:50,20)
> y5<-sample(21:50,20)
> df2<-data.frame(y1,y2,y3,y4,y5)
> df2

## Output

  y1 y2 y3 y4 y5
1 24 46 43 27 47
2 25 24 38 33 31
3 46 44 46 39 41
4 39 23 39 47 37
5 50 42 42 37 30
6 48 39 32 44 32
7 27 31 21 40 24
8 21 27 29 41 38
9 22 30 26 23 22
10 41 28 35 30 28
11 28 32 41 34 48
12 31 37 27 43 21
13 38 34 22 29 35
14 34 50 47 22 27
15 42 47 50 35 23
16 32 49 25 49 46
17 49 33 37 42 25
18 23 22 40 48 39
19 30 48 28 45 49
20 45 45 24 25 29

Finding minimum and maximum values for columns in df2:

## Example

> t(sapply(df2,range))

## Output

  [,1] [,2]
y1 21   50
y2 22   50
y3 21   50
y4 22   49
y5 21   49

Updated on: 23-Nov-2020

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