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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to avoid the warning "Cannot compute exact p-value with ties" while perform correlation test for Spearman's correlation in R?
When the variables are not continuous but could be ranked then we do not use pearson correlation coefficient to find the linear relationship, in this case spearman correlation coefficient comes into the scene. Since the spearman correlation coefficient considers the rank of values, the correlation test ignores the same ranks to find the p-values as a result we get the warning “Cannot compute exact p-value with ties”. This can be avoided by using exact = FALSE inside the cor.test function.ExampleConsider the below vectors and perform spearman correlation test to check the relationship between them −x1
Read MoreHow to find the number of values in a column of an R data frame that are not zero?
If an R data frame has numerical columns then it is also possible that there exist zeros in few or all columns and we might be interested in finding the number of non-zero values in a column. This will help us to compare the columns based on the number on non-zero values and it can be done by using colSums.ExampleConsider the below data frame −x1
Read MoreStore and retrieve arrays into and from HTML5 data attributes with jQuery?
To store and retrieve arrays into and from data attributes, use the data() method in jQuery. Following is the syntax −var anyVariableName= $('#yourIdName).data('yourJavscriptArrayName');Following is the jQuery code −Example Document var value = $('#test').data('details'); alert(value); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output −
Read MoreHow to get value from the first checkbox which is not hidden in jQuery?
To get value from the first checkbox, which is not hidden, use the :visible selector. Following is the code −Example >Document .notShown { display: none; } var v=$('input:checkbox:checked:visible:first').val(); console.log(v); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.This will produce the following output displaying the visible value “second” in console −
Read MoreFind the probability of reaching all points after N moves from point N in C++
Suppose we have a number N this represents the initial position of the person on the number line. We also have L which is the probability of the person of going left. We have to find the the probability of reaching all points on the number line after completing N moves from point N. Each move can be either to the left or to the right.So, if the input is like n = 2, l = 0.5, then the output will be [0.25, 0, 0.5, 0, 0.25]To solve this, we will follow these steps −high := 1 - lowDefine an ...
Read MoreFind the shortest distance between any pair of two different good nodes in C++
Suppose we have a given weighted undirected graph with N different nodes and M edges, some of the nodes are good nodes. We have to find the shortest distance between any pair of two different good nodes. In the given diagram the yellow in the following graph are considered to be good nodes.So, if the input is likethen the output will be 11, as the pairs of good nodes and distance between them are: (1 to 3) the distance is 11, (3 to 5) the distance is 13, (1 to 5) the distance is 24, out of which 11 is ...
Read MoreProduct of all prime numbers in an Array in C++
Given an integer array arr[] with some elements, the task is to find the product of all the prime number of that numbers.Prime number are those number which are either divided by 1 or the number itself, or a prime number is a number which is not divisible by any other number except 1 and the number itself. Like 1, 2, 3, 5, 7, 11, etc.we have to find the solution for the given array −Input −arr[] = { 11, 20, 31, 4, 5, 6, 70 }Output − 1705Explanation − Prime numbers in array are − 11, 31, 5 their ...
Read MoreReasons for a C++ program crash
The abnormal behavior of C++ programs often leads to program crash. You may have encountered problems like Segmentation fault, Aborted, Floating point exception etc. Following are sample programs that may help you to understand the reasons for a C++ program crash.ExceptionsExceptions in C++ are responses of a program when it encounters an abnormal condition. The program crashes due to such exceptions if they are not handled properly using try-catch blocks. Following program crashes due to divide by zero exception −Example#include int main(){ int num1=10; int num2=0; int quotient=num1/num2; printf(" Quotient is: %d", quotient); return ...
Read MoreCount Distinct Non-Negative Integer Pairs (x, y) that Satisfy the Inequality x*x + y*y < n in C++
We are given a positive integer N. The goal is to count the pairs of distinct non-negative positive integers that satisfy the inequality − x*x + y*y < N.We will start from x=0 to x2 lt; N and y=0 to y2 < N . If any x2 + y2 < N, increase count of pairs.Let us understand with examples −Input − n=4Output − distinct pairs= 4Explanation − pairs will be (0, 0), (1, 1), (0, 1), (1, 0). All these satisfy the inequality x2 + y2 < 4Input −n=2Output − distinct pairs= 3Explanation &minus pairs will be (0, 0), (0, ...
Read MoreRefresh page after clearing all form fields in jQuery?
To refresh page, use the location.reload() in JavaScript. The sample JavaScript code is as follows −Example Document UserName: Password: Refresh Page $('#RefreshPage').click(function() { location.reload(); }); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output −After filling the form, the snapshot is as follows −When you click the button “Refresh Page”, the page will refresh and the following output is visible −
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