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We are required to write a JavaScript function that determines how many different ways we can remove a group of values from a sequence, leaving the original sequence in order (stable), and making sure to remove only one instance value each from the original sequence.For example − If the sequence array is −const arr = [1, 2, 1, 3, 1, 4, 4];And the array to be removed is −const arr2 = [1, 4, 4];Then there are three possible ways of doing this without disrupting the order of elements −1 --> [2, 1, 3, 1] 2 --> [1, 2, 3, 1] ... Read More
If we find the mean of scientific numbers then the result will be also in scientific notation. We can get rid of this problem by using options(scipen=999), once we will use this code in R console all the inputs that are in scientific notation will be converted to normal numeric form, including any calculation and if we want to go back to the scientific notation then options(scipen=0) can be used.ExampleLive Demo> x1 mean(x1)Output[1] 4.436267e-22Example> options(scipen=999) > mean(x1)Output[1] 0.0000000000000000000004436267ExampleLive Demo> x2 x2Output[1] 0.000000000000000000000000000000000000001010964 [2] 0.000000000000000000000000000068291679999999998 [3] 0.000000000000000000000000006026013000000000181 [4] 0.000000000000000000000000002702241000000000107 [5] 0.000000000000000000000042258669999999998179163 [6] 0.000000000000000000000000000000091949710000000 [7] 0.000000000000000000000000000000000000107406400 [8] 0.000000000000000000000000000000091949710000000 [9] 0.000000000000000000000003463124999999999951636 [10] 0.000000000000000000004305051000000000103323794 ... Read More
Suppose, we have an array of objects like this −const arr = [{ 'title': 'Hey', 'foo': 2, 'bar': 3 }, { 'title': 'Sup', 'foo': 3, 'bar': 4 }, { 'title': 'Remove', 'foo': 3, 'bar': 4 }];We are required to write a JavaScript function that takes in one such array as the first input and an array of string literals as the second input.Our function should then prepare a new array that contains all those objects whose title property is partially or fully included in the second input array of literals.ExampleThe code for ... Read More
Suppose, we have an array string that contains some duplicate entries like this −const arr = ['California', 'Texas', 'Texas', 'Texas', 'New York', 'Missouri', 'New Mexico', 'California'];We are required to write a JavaScript function that takes in one such array. Our function should then construct an array of objects that contains an object for each unique entry and a property "count" that contains its count in the original array.Therefore, the final output for the above array should look something like this −const output = [ {'name':'California', 'count':2}, {'name':'Texas', 'count':3}, {'name':'New York', 'count':1}, {'name':'Missouri', 'count':1}, {'name':'New Mexico', ... Read More
The absolute distance can be found by calculating the difference between column values. And if we want the distance to be absolute then we would be need to use abs function. For example, suppose we have a data frame df that contain columns x and y then the absolute distance can be found by using df$Absolute_Distance set.seed(274) > x1 y1 df1 df1Output x1 y1 1 6 11 2 1 4 3 4 2 4 7 12 5 4 5 6 6 10 7 6 14 8 6 8 9 2 11 10 3 8 11 3 8 12 2 6 ... Read More
Suppose, we have one array of strings and another array of objects like this −const arr1 = [ '1956888670', '2109171907', '298845084' ]; const arr2 = [ { KEY: '1262875245', VALUE: 'Vijay Kumar Verma' }, { KEY: '1956888670', VALUE: 'Sivakesava Nallam' }, { KEY: '2109171907', VALUE: 'udm analyst' }, { KEY: '298845084', VALUE: 'Mukesh Nagora' }, { KEY: '2007285563', VALUE: 'Yang Liu' }, { KEY: '1976156380', VALUE: 'Imtiaz Zafar' }, ];We are required to write a JavaScript function that takes in two such arrays. Then our function should return a filtered version of the second ... Read More
Suppose we have a short JSON object like this −const obj = {"name":"sam", "age":"24", "isMarried":"false"};Here, some of the Number and Boolean values, by mistake, have been coerced to String.Like the age property which was a Number and isMarried property which was a boolean. Our job is to write a function that takes in one such object and correctly changes these incorrect data types with the correct ones.ExampleThe code for this will be −const obj = { "name":"sam", "age":"24", "isMarried":"false" }; const convertToOriginal = (obj = {}) => { const keys = Object.keys(obj); for(let i = ... Read More
The X Window System is a windowing system for bitmap displays. In R, we can create this graphical display by simply typing x11 in the R console and the graphic interface will pop-up on the right-hand side. We can change the width and height of this display by using the arguments width and height inside x11 call. There are many other arguments of x11 that helps us to change the aesthetic property of the bitmap display. The description of those arguments is as written below:Displaythe display on which the graphics window will appear. The default is to use the value ... Read More
The boxplot function in base R helps us to create the boxplot without any hustle but this plot is covered with a square bracket and also takes the Y-axis labels on left-hand side. We can get rid of this square bracket without making an impact on the Y-axis labels. For this purpose, we need to use frame.plot = FALSE argument inside the boxplot function.Example1> x boxplot(x,frame.plot=FALSE)Output:Example2> y boxplot(y,frame.plot=FALSE)Output:Example3> z boxplot(z,frame.plot=FALSE)Output:
Mostly, we start with creating models by including single independent variables effect on the dependent variable and then move on to interaction. But if we are sure that there exists some interaction among variables and we are looking for the interaction effect then only interaction regression model can be created. This can be done by using colon sign between variables to signify the interaction as shown in the below examples.Example1Consider the below data frame:Live Demo> x1 x2 x3 y df1 df1Outputx1 x2 x3 y 1 1 3 10 8 2 0 3 9 11 3 1 1 6 5 4 ... Read More