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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to extract p-values for intercept and independent variables of a general linear model in R?
General linear model does not assume that the variables under consideration are normally distributed, therefore, we can use other probability distributions to create a general linear model. We should actually say that if the data does not follow normal distribution then we can try different distributions using general linear model and check whether the model is appropriate or not. The p-values plays an important role in selecting the best model and we might want to extract them from the model object. This can be done by using coef function.ExampleConsider the below data frame −> set.seed(123) > var1 var2 var3 Response ...
Read MoreCount number of triplets (a, b, c) such that a^2 + b^2 = c^2 and 1<=a<=b<=c<= n in C++
We are given an integer n. The goal is to find triplets ( set of 3 numbers ) that satisfy the conditions −a2+b2=c21
Read MoreMaximize the sum of products of the degrees between any two vertices of the tree in C++
Given the task is to construct a tree with a given integer N such that, the sum of degree(x) * degree(y) for all ordered pairs (x, y) is maximum and x is not equal to y.Input −N=5Output −50Explanation 1 \ 2 \ 3 \ 4 \ 5 Degree of 1st node = 1 Degree of 2nd node = 2 Degree of 3rd node = 2 Degree of 4th node ...
Read MoreCount number of triplets in an array having sum in the range [a,b] in C++
We are given an array of integers, Arr[] and two variables a and b to define a range [a,b]. The goal is to find the number of triplets whose sum lies in between this range [a,b].We will do this by using three for loops. Increment count if arr[i]+arr[j]+arr[k]>=a and arr[i]+arr[j]+arr[k]
Read MoreHow to determine the percentiles of a vector values in R?
Percentile helps us to determine the values that lie at a certain percent in a data set. For example, if we have a vector of size 100 with containing any values and suppose that the tenth-percentile of the vector is 25, which means there are ten percent values in the vector that are less than 25, or we can say, there are ninety percent values in the vector that are greater than 25. We can find percentiles of a vector values using quantile function in R.Examples> x1 x1Output[1] 7 1 7 6 6 5 3 1 5 5 4 5 ...
Read MoreMaximum sum subarray such that start and end values are same in C++
In this tutorial, we will be discussing a program to find maximum sum subarray such that start and end values are same.For this we will be provided with an array containing integers. Our task is to find the subarray with the maximum sum such that the elements are both its ends are equal.Example#include using namespace std; //finding the maximum sum int maxValue(int a[], int n) { unordered_map first, last; int pr[n]; pr[0] = a[0]; for (int i = 1; i < n; i++) { pr[i] = pr[i - 1] + a[i]; ...
Read MoreMaximize the size of array by deleting exactly k sub-arrays to make array prime in C++
Given the task is to delete exactly K sub-arrays from a given array Arr[] with N positive elements such that all the remaining elements in the array are prime and the size of the remaining array is maximum.Input Arr[]={4, 3, 3, 4, 3, 4, 3} , K=2Output 3Explanation − K=2, this means only 2 sub-arrays must be deleted.The sub-arrays deleted are Arr[0] and Arr[3…5] which leaves the array Arr[]={3, 3, 3} with all the prime elements and the maximum size possible.Input Arr[]={7, 6, 2, 11, 8, 3, 12}, K=2Output 3Explanation − The sub-arrays deleted are Arr[1] and Arr[4…6] and the remaining prime array is ...
Read MoreCount of index pairs with equal elements in an array in C++
We are given with an array of N elements. The goal is to find the index pairs (i, j) which have the same element value such that i!=j. i.e, Arr[i]=Arr[j] and i!=j. This is used to make pairs of gloves of equal size. Out of N gloves only paired gloves are useful to sell.We will do this by running two loops with 0 -1. Total pairs=2Approach used in the below program is as followsWe take an integer array Arr[] initialized with random numbers for size of gloves > 0.Take a variable n which stores the length of Arr[].Function countPairs(int arr[], ...
Read MoreHow to change the angle of annotated text in plot created by using ggplot2 in R?
To annotate the text inside a plot created by ggplot2, we can use annotate function. It is used to give some explanation about the plot or add any useful information that will help readers to understand the plot in a better way. Sometimes, we might want to change the angle of the annotated text, especially in cases where we have some information that is presented vertically in the plot, therefore, we can use angle argument of the annotate function.ExampleConsider the below data frame −> x y df dfOutput x y 1 4.086537 5.890591 2 2.271184 ...
Read MoreMaximum sum subsequence with at-least k distant elements in C++
In this tutorial, we will be discussing a program to find maximum sum subsequence with at-least k distant elements.For this we will be provided with an array containing integers and a value K. Our task is to find the subsequence having maximum sum such that all the elements are at least K elements apart.Example#include using namespace std; //finding maximum sum subsequence int maxSum(int arr[], int N, int k) { int MS[N]; MS[N - 1] = arr[N - 1]; for (int i = N - 2; i >= 0; i--) { if (i + ...
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