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To display the upper and lower quartiles through different line in base R boxplot, we can use abline function but we need to find the quartiles inside abline using quantile for the respective quartiles. The lines created by using abline and quantiles and the boxplot function may not coincide because of the differences in calculation. The calculation method for boxplot is explained below −The two ‘hinges’ are versions of the first and third quartile. The hinges equal the quartiles for odd n (where n x boxplot(x)OutputExample> abline(h=quantile(x,c(0.25,0.75)),col="blue")Output
Good BaseFor an integer num, we call k (k >= 2) a good base of num, if all digits of num base k are 1.For instance: 13 base 3 is 111, hence 3 is a good base for num = 13ProblemWe are required to write a JavaScript function that takes in string str that represents a number as the only argument. The function should return the string representation of the smallest possible number which is a good base for str.For example, if the input to the function is −const str = "4681";Then the output should be −const output = "8";Output ... Read More
We are required to write a JavaScript function that takes in a number as the first and the only argument.The task of our function is to perform at most one swap between any two digits of the number and yield the maximum possible number. If, however, the number is already the maximum possible number we should return the number itself.For example −If the input number is −const num = 1625;Then the output should be −const output = 6125;We swapped 1 and 6 and this is the only swap the yields the greatest number in single swapExampleThe code for this will ... Read More
Perfect Square Numbers:A natural number in mathematics is called a perfect square if it can be obtained by multiplying any other natural number into that very number.For instance, 9, 16, 81, 289 are all perfect squares.We are required to write a JavaScript function that takes in a natural number, say num, as the only argument. The function should determine whether there exists two such number m and n such that −(m * m) + (n * n) = numIf there exists such numbers, our function should return true, false otherwise.For example −If the input number is −const num = 389;Then ... Read More
Suppose, we have a binary matrix (an array of array that contains only 0 or 1) like this −const arr = [ [0, 1, 1, 0], [0, 1, 1, 0], [0, 0, 0, 1] ];We are required to write a JavaScript function that takes in one such matrix as the first and the only argument.The task of our function is to find the longest line of consecutive ones in the matrix and return the count of 1s in it. The line could be horizontal, vertical, diagonal or anti-diagonal.For example, for the above array, the output should be ... Read More
A binary matrix is an array of arrays containing only 0 or 1. We are required to write a JavaScript function that takes in a binary matrix as the only argument.Our function should create a new matrix containing the same number of rows and columns, and for each element of the original matrix the resulting matrix should contain that element's nearest distance from 0 in the original matrix.We have to keep in mind that while calculating distance it can move either horizontally or vertically and not diagonally. And it's guaranteed that the matrix contains at least one 0.For example −If ... Read More
We are required to write a JavaScript function that takes in a string str as the first argument and an integer num as the second argument.Our function should reverse the first num characters for every 2 * num characters counting from the start of the string. And if there are less than num characters left, we have to reverse all of them.If there are less than 2 * num but greater than or equal to num characters, then we have to reverse the first num characters and leave the other as original.For example −If the input string and the number ... Read More
We often come through services like bit.ly and tinyurl which takes in any url and (usually one bigger in length), performs some encryption algorithm over it and returns a very short url. And similarity when we try to open that tiny url, it again runs some decryption algorithm over it and converts the short url to the original one opens the link for us.We are also required to perform the same task. We are actually required to write two functions −encrypt() --> it will take in the original url and return to us a short unique ur.decrypt() --> it will take in ... Read More
We are required to write a JavaScript function that takes in the root of a BST that holds some numerical data like this −1 \ 3 / 2The function should return the minimum absolute difference between any two nodes of the tree.For example −For the above tree, the output should be −const output = 1;because |1 - 2| = |3 - 2| = 1ExampleThe code for this will be − Live Democlass Node{ constructor(data) { this.data = data; this.left = null; this.right = null; }; }; class BinarySearchTree{ constructor(){ ... Read More
We are required to write a JavaScript function that takes in an array of numbers as the first and the only argument.The task of our function is to pick and return the third maximum number from the array. And if the array does not contain any third maximum number then we should simply return the maximum number from the array.For example −If the input array is −const arr = [34, 67, 31, 87, 12, 30, 22];Then the output should be −const output = 34;ExampleThe code for this will be − Live Democonst arr = [34, 67, 31, 87, 12, 30, 22]; ... Read More