Programming Example

How to set all the column value by a single TRUE value in the data frame

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💻 Practical Program

📘 Step by Step Learning

Here is your data frame. You have to change all the values present in the column PassOrFail to TRUE

Student <- data.frame(RollNo = 1:10,  Marks = c(10, 20, 30, 40, 50, 60, 70, 80, 90, 100), PassOrFail = c(F, F, F, F, F, T, T, T, T, T))

Program Code

Student$PassOrFail = TRUE

Output

<img src="/library/images-tutorials/1.student_data_frame3.png" alt="data frame, r language" class="img-responsive">

Explanation

You can also use the above code like below

Student$PassOrFail = FALSE

How to learn from this program

First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.

Practice suggestion

After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.