by Sai gowtham

How to get first n characters from a string in R

In this tutorial, we are going to learn about how to get the first n characters from a string in the R language.

Getting the first n characters

To get the first n characters from a string, we can use the built-in substr() function in R.

The substr() function takes 3 arguments, the first one is a string, the second is start position, third is end position.

Here is an example, that gets the first 2 characters from a string:

name = 'orange'
firstTwo = substr(name,1,2)
print(firstTwo)

Output:

[1] "or"

Note: The negative values count backward from the last character.

You can also get the first 3 characters of a string like this:

name = 'orange'
firstThree = substr(name,1,3)
print(firstThree)

Output:

[1] "ora"

Css Tutorials & Demos

How rotate an image continuously in CSS

In this demo, we are going to learn about how to rotate an image continuously using the css animations.

How to create a Instagram login Page

In this demo, i will show you how to create a instagram login page using html and css.

How to create a pulse animation in CSS

In this demo, i will show you how to create a pulse animation using css.

Creating a snowfall animation using css and JavaScript

In this demo, i will show you how to create a snow fall animation using css and JavaScript.

Top Udemy Courses

JavaScript - The Complete Guide 2021 (Beginner + Advanced)
JavaScript - The Complete Guide 2021 (Beginner + Advanced)
64,026 students enrolled
52 hours of video content
View Course
React - The Complete Guide (incl Hooks, React Router, Redux)
React - The Complete Guide (incl Hooks, React Router, Redux)
284,472 students enrolled
40 hours of video content
View Course
Vue - The Complete Guide (w/ Router, Vuex, Composition API)
Vue - The Complete Guide (w/ Router, Vuex, Composition API)
152,857 students enrolled
48.5 hours of video content
View Course