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Server Side Programming Articles
Page 1167 of 2109
How to create a plot with reversed Y-axis labels in base R?
To create a plot with reversed Y-axis we need to use the rev function for the Y-axis labels with ylim but we would also need to define the range for the y-axis values, otherwise, R will throw an error. For example, if we have two vectors named as x and y then the plot with reversed Y-axis labels can be created by using plot(x,ylim=rev(range(y))).Examplex
Read MoreHow to create a plot with dashed regression line in base R?
To create a regression line in base R, we use abline function after creating the scatterplot but if we want to have the line dash format then lty argument must also be used with value equals to 2 after defining the regression model inside abline. For example, if we have two columns x and y stored in a data frame called df then the plot with dashed regression line can be created by using −plot(y~x, data=df) abline(lm(df$y~df$x), lty=2)ExampleConsider the below data frame −> x y df dfOutput x y 1 5.243553 4.969598 2 4.681088 5.076128 ...
Read MoreHow to create a plot in base R with dates sequence on X-axis?
If we have a vector that contains dates as sequence that needs to be plotted on the X-axis and another vector for the response then the plot can be simply created by using the plot function. In the plot function, we would need to pass the dates as the first argument and the response vector as the second argument. Check ou the examples below to understand how it works.Examplex
Read MoreHow to create a plot of quadratic regression with fitted values against X in base R?
The quadratic regression model can be plotted by using the plot function but we would need to find the fitted values using the model and this can be done with the help of fitted function. For example, if we have a quadratic model M and the data has an independent variable x then the model against x can be created by using plot(x,fitted(M)).Examplex1
Read MoreMaximum Subarray Sum Excluding Certain Elements in C++ program
In this problem, we are given two arrays arr1[] of size n and arr2[] of size m. Our task is to create a program to find the maximum subarray sum excluding certain elements.Problem Description − We need to find the maximum subarray sum from elements of the array arr1[] that are not present in arr2[].Let’s take an example to understand the problem, Inputarr1[] = {4, 5, 7, 2, 9}, arr2[] = {1, 9, 2, 7}Output9Explanationarr1 after removal of elements of arr2[] = {4, 5} Both can form a subarray, hence sum = 4+5 = 9.Solution ApproachA simple solution to the ...
Read MoreMaximum subsequence sum such that no three are consecutive in C++ Program
In this problem, we are given an array arr[] consisting of n positive integers. Our task is to create a program to find the maximum subsequence sum such that no three are consecutive.Problem Description − Here, we need to find the sum of sequences created from the array such that there are no three consecutive elements.Consecutive elements of an array are those elements that have followed the same order of index.arr[0], arr[1], arr[2], …Let’s take an example to understand the problem, Inputarr[] = {5, 9, 12, 15}Output32ExplanationSum = 5 + 12 + 15 = 32Solution ApproachA simple solution to the ...
Read MoreMaximum sum of smallest and second smallest in an array in C++ Program
In this problem, we are given an array arr[]. Our task is to create a program to find the maximum sum of smallest and second smallest in an array.Problem Description − We need to find the sum of the smallest and second smallest elements of a sum subarray of the array. And return the maximum of all such subarray sums.ExampleLet’s take an example to understand the problem, Inputarr[] = {3, 5, 4, 2, 9, 1, 6}Output11ExplanationTheir out of all subarrays possible, {2, 9} has a maximum sum of smallest elements. Sum = 2 + 9 = 11Solution ApproachA simple solution ...
Read MoreMaximum Sum of Products of Two Array in C++ Program
In this problem, we are given two arrays arr1[] and arr2[] of size n. Our task is to create a program to find the maximum Sum of Products of Two Array.Problem Description − We need to find the maximum sum of products of two arrays. We need to find the maximum sum of the product of one element from arr1 and other elements from arr2.Let’s take an example to understand the problem, Inputarr1[] = {3, 5, 6} arr2[] = {1, 4, 2}Output37ExplanationMaximum sum of products: 6*4 + 5*2 + 3*1 = 24 + 10 + 3 = 37Solution ApproachA simple ...
Read MoreMaximum sum subarray such that start and end values are same in C++ Program
In this problem, we are given an array arr[] of size n consisting of positive values. Our task is to create a program to find the maximum sum subarray such that start and end values are the same.Problem Description − Here, we need to find a subarray such that the elements at index i (starting index of subarray) and j (ending index of subarray) are the same i.e. arr[i] = arr[j]. And the sum of elements of the subarray is maximized.Let’s take an example to understand the problem, Inputarr[] = {2, 1, 3, 5, 6, 2, 4, 3}Output23ExplanationAll subarrays which ...
Read MoreMaximum sum subsequence with at-least k distant elements in C++ program
In this problem, we are given an array arr[] of size n and a number k. Our task is to create a program to find the maximum sum subsequence with atleast k distant elements.Problem Description − We need to find the sum of subarrays such that the elements of the subarray are taken from the array whose index is at k distance and the sum is maximized.Let’s take an example to understand the problem, Inputarr[] = {2, 3, 7, 9, 2, 8, 3}Output15ExplanationAll subsequences that satisfy the given condition, {2, 9, 3}, Sum = 14 {3, 2}, Sum = 5 ...
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