Course

Additional

Find the Statistical Mode Write to a File Format Decimal Places

Data Frames

Convert a List to a Dataframe Create an Empty Dataframe Combine Two Dataframe into One Change Column Name of a Dataframe Extract Columns From a Dataframe Drop Columns in a Dataframe Reorder Columns in a Dataframe Split Dataframe Merge Multiple Dataframes Delete Rows From Dataframe Make a List of Dataframes

Introduction

"Hello World" Program Add Two Vectors Find Sum, Mean and Product of Vector in R Programming Take Input From User Generate Random Number from Standard Distributions Sample from a Population Find Minimum and Maximum Sort a Vector

Strings

Concatenate Two Strings Find the Length of a String Check if Characters are Present in a String Extract n Characters From a String Replace Characters in a String Compare two Strings Convert Factors to Characters Trim Leading and Trailing Whitespaces

Vectors

Concatenate a Vector of Strings Check if a Vector Contains the Given Element Count the Number of Elements in a Vector Find Index of an Element in a Vector Access Values in a Vector Add Leading Zeros to Vector

Decision and Loops

Find the Factorial of a Number R Multiplication Table Check Prime Number check Armstrong Number Print the Fibonacci Sequence Check for Leap Year Check if a Number is Odd or Even in R Programming Check if a Number is Positive, Negative or Zero Find the Sum of Natural Numbers

Functions

Convert Decimal into Binary using Recursion in R Find the Factorial of a Number Using Recursion Find the Factors of a Number Fibonacci Sequence Using Recursion in R Find H.C.F. or G.C.D.Find L.C.M.Make a Simple Calculator Sum of Natural Numbers Using Recursion

R Program to Sort a Vector

Sorting of vectors can be done using the sort() function.

By default, it sorts in ascending order. To sort in descending order we can pass decreasing=TURE.

Note that sort is not in-place. This means that the original vector is not effected (sorted).

Only a sorted version of it is returned.

Example: Sort a Vector


              
> x
[1] 7 1 8 3 2 6 5 2 2 4

> # sort in ascending order
> sort(x)
[1] 1 2 2 2 3 4 5 6 7 8

> # sort in descending order
> sort(x, decreasing=TRUE)
[1] 8 7 6 5 4 3 2 2 2 1

> # vector x remains unaffected
> x
[1] 7 1 8 3 2 6 5 2 2 4

Sometimes we would want the index of the sorted vector instead of the values. In such case we can use the function order().


              
> order(x)
[1]  2  5  8  9  4 10  7  6  1  3

> order(x, decreasing=TRUE)
[1]  3  1  6  7 10  4  5  8  9  2

> x[order(x)]    # this will also sort x
[1] 1 2 2 2 3 4 5 6 7 8