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How to find the length of the largest string in an R data frame column?
The length of the largest string can be found with the help of max function combined with nchar function. For this purpose, we first need to access the appropriate column that contains string values. Suppose, we have a data frame called df that contains a string column defined as CHAR then the length of the largest string will be found by using the command max(nchar(df$CHAR)).
Consider the below data frame −
Example
x<-sample(c("India","China","UK","USA","Japan","Sudan"),20,replace=TRUE)
df1<-data.frame(x)
df1Output
x 1 USA 2 USA 3 Sudan 4 India 5 Japan 6 Japan 7 Sudan 8 India 9 India 10 Japan 11 Sudan 12 Japan 13 China 14 Sudan 15 UK 16 China 17 UK 18 Japan 19 India 20 USA
Finding the largest string in column x of df1 −
max(nchar(df1$x))
[1] 5
Example
y<-sample(c("Spring","Summer","Winter","Rainy"),20,replace=TRUE)
df2<-data.frame(y)
df2Output
y 1 Spring 2 Spring 3 Winter 4 Winter 5 Summer 6 Rainy 7 Summer 8 Spring 9 Spring 10 Winter 11 Rainy 12 Rainy 13 Rainy 14 Summer 15 Winter 16 Summer 17 Rainy 18 Winter 19 Winter 20 Spring
Finding the largest string in column y of df2 −
max(nchar(df2$y))
[1] 6
Example
z<-sample(c("Digital Marketing","Data Science","Leadership","IT"),20,replace=TRUE)
df3<-data.frame(z)
df3Output
z 1 Data Science 2 IT 3 Leadership 4 Data Science 5 Digital Marketing 6 Digital Marketing 7 Data Science 8 Data Science 9 IT 10 Data Science 11 Leadership 12 Digital Marketing 13 Data Science 14 Digital Marketing 15 Leadership 16 Digital Marketing 17 IT 18 Data Science 19 Leadership 20 Digital Marketing
Finding the largest string in column z of df3 −
max(nchar(df3$z))
[1] 17
Updated on: 06-Feb-2021
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