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Scikit-learn, commonly known as sklearn is an open-source library in Python that is used for the purpose of implementing machine learning algorithms.This includes classification, regression, clustering, dimensionality reduction, and much more with the help of a powerful, and stable interface in Python. This library is built on Numpy, SciPy and Matplotlib libraries.Let us see an example to load data −Examplefrom sklearn.datasets import load_iris my_data = load_iris() X = my_data.data y = my_data.target feature_name = my_data.feature_names target_name = my_data.target_names print("Feature names are : ", feature_name) print("Target names are : ", target_name) print("First 8 rows of the dataset are : ", X[:8])OutputFeature ... Read More
Scikit-learn, commonly known as sklearn is a library in Python that is used for the purpose of implementing machine learning algorithms.It is an open-source library hence it can be used free of cost. Powerful and robust, since it provides a wide variety of tools to perform statistical modelling. This includes classification, regression, clustering, dimensionality reduction, and much more with the help of a powerful, and stable interface in Python. This library is built on Numpy, SciPy and Matplotlib libraries.It can be installed using the ‘pip’ command as shown below −pip install scikit-learnThis library focuses on data modelling.There are many models ... Read More
Identity MatrixAn identity Matrix is a matrix which is n × n square matrix where the diagonal consist of ones and the other elements are all zeros.For example an identity matrix of order is will be −const arr = [ [1, 0, 0], [0, 1, 0], [0, 0, 1] ];We are required to write a JavaScript function that takes in a number, say n, and returns an identity matrix of n*n order.ExampleFollowing is the code −const num = 5; const constructIdentity = (num = 1) => { const res = []; for(let i = 0; ... Read More
We are required to write a JavaScript function that takes in a string that might contain some alphabets. The function should count and return the number of vowels that exists in the string.ExampleFollowing is the code −const str = 'this is a string'; const countVowels = (str = '') => { str = str.toLowerCase(); const legend = 'aeiou'; let count = 0; for(let i = 0; i < str.length; i++){ const el = str[i]; if(!legend.includes(el)){ continue; }; count++; }; return count; }; console.log(countVowels(str));OutputFollowing is the output on console −4
We are required to write a JavaScript function that takes in a string as the only argument. The function should generate an array of strings that contains all possible contiguous substrings that exist in the array.ExampleFollowing is the code −const str = 'Delhi'; const allCombinations = (str1 = '') => { const arr = []; for (let x = 0, y=1; x < str1.length; x++,y++) { arr[x]=str1.substring(x, y); }; const combination = []; let temp= ""; let len = Math.pow(2, arr.length); for (let i = 0; i < len ; i++){ temp= ""; for (let j=0;j
We are required to write a JavaScript function that takes in a floating-point number up to 2 digits of precision.The function should convert that number into the Indian current text.For example −If the input number is −const num = 12500Then the output should be −const output = 'Twelve Thousand Five Hundred';ExampleFollowing is the code −const num = 12500; const wordify = (num) => { const single = ["Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"]; const double = ["Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"]; const tens = ["", "Ten", "Twenty", "Thirty", ... Read More
We are required to write a JavaScript function that takes in two numbers. The first number represents the length of the base of a right triangle and the second is perpendicular. The function should then compute the length of the hypotenuse based on these values.For example −If base = 8, perpendicular = 6Then the output should be 10ExampleFollowing is the code −const base = 8; const perpendicular = 6; const findHypotenuse = (base, perpendicular) => { const bSquare = base ** 2; const pSquare = perpendicular ** 2; const sum = bSquare + pSquare; const hypotenuse = Math.sqrt(sum); return hypotenuse; }; console.log(findHypotenuse(base, perpendicular)); console.log(findHypotenuse(34, 56));OutputFollowing is the output on console −10 65.5133574166368
We are required to write a JavaScript function that takes in a string that represents a ASCII number. The function should convert the number into its corresponding hexadecimal code and return the hexadecimal.For example −f the input ASCII string is −const str = '159';Then the hexadecimal code for this should be 313539.ExampleFollowing is the code −const str = '159'; const convertToHexa = (str = '') =>{ const res = []; const { length: len } = str; for (let n = 0, l = len; n < l; n ++) { const hex = ... Read More
Union SetUnion Set is the set made by combining the elements of two sets. Therefore, the union of sets A and B is the set of elements in A, or B, or both.For example −If we have two sets denoted by two arrays like this −const arr1 = [1, 2, 3]; const arr2 = [100, 2, 1, 10];Then the union set will be −const union = [1, 2, 3, 10, 100];We are required to write a JavaScript function that takes in two such arrays of literals and returns their union array.ExampleFollowing is the code −const arr1 = [1, 2, 3]; ... Read More
We are required to write a JavaScript function that takes in a nested array of literals as the only argument. The function should construct a new array that contains all the literal elements present in the input array but without nesting.For example −If the input array is −const arr = [ 1, 3, [5, 6, [7, [6, 5], 4], 3], [4] ];Then the output array should be −const output = [1, 3, 5, 6, 7, 6, 5, 4, 3, 4];ExampleFollowing is the code −const arr = [ 1, 3, [5, 6, [7, [6, 5], 4], 3], [4] ]; ... Read More