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Programming Articles
Page 28 of 2544
How to create a sample or samples using probability distribution in R?
A probability distribution is the type of distribution that gives a specific probability to each value in the data set. For example, if we have a variable say X that contains three values say 1, 2, and 3 and each of them occurs with the probability defined as 0.25, 0.50, and 0.25 respectively then the function that gives the probability of occurrence of each value in X is called the probability distribution. In R, we can create the sample or samples using probability distribution if we have a predefined probabilities for each value or by using known distributions such as ...
Read MorePython – Calculate the percentage of positive elements of the list
When it is required to calculate the percentage of positive elements of the list, a list comprehension and the ‘len’ method are used.Below is a demonstration of the same −Examplemy_list = [14, 62, -22, 13, -87, 0, -21, 81, 29, 31] print("The list is :") print(my_list) my_result = (len([element for element in my_list if element > 0]) / len(my_list)) * 100 print("The result is :") print(my_result)OutputThe list is : [14, 62, -22, 13, -87, 0, -21, 81, 29, 31] The result is : 0ExplanationA list is defined and displayed on the console.A list comprehension is used to ...
Read MoreHow to create boxplot using ggplot2 without box border in R?
We know that the middle portion of a boxplot is a box which is covered with black border but we can remove that border from the plot by defining the aesthetics of the boxplot with color argument. We can follow the below steps to create such type of boxplot −Creating a data frame.Then create a default boxplot.Loading ggplot2 package and creating the same boxplot without box border.Create the data frameLet's create a data frame as shown below −x
Read MorePython – Sort by Maximum digit in Element
When it is required to sort by maximum digit in element, a method is defined that uses ‘str’ and ‘max’ method to determine the result.Below is a demonstration of the same −Exampledef max_digits(element): return max(str(element)) my_list = [224, 192, 145, 18, 3721] print("The list is :") print(my_list) my_list.sort(key = max_digits) print("The result is :") print(my_list)OutputThe list is : [224, 192, 145, 18, 3721] The result is : [224, 145, 3721, 18, 192]ExplanationA method named ‘max_digits’ is defined that takes element as a parameter, and converts it into a string, and then gets the maximum of ...
Read MoreHow to create a bar plot in R filled with color palette in RColorBrewer package?
To create a bar plot in R filled with color palette in RColorBrewer package, we can follow the below steps −First of all, create a vector.Create the bar plot with color palette in RColorBrewer package.Example 1Let’s create a vector as shown below −x
Read MorePython program to sort matrix based upon sum of rows
When it is required to sort matrix based upon sum of rows, a method is defined that uses ‘sum’ method to determine the result.Below is a demonstration of the same −Exampledef sort_sum(row): return sum(row) my_list = [[34, 51], [32, 15, 67], [12, 41], [54, 36, 22]] print("The list is :") print(my_list) my_list.sort(key = sort_sum) print("The result is :") print(my_list)OutputThe list is : [[34, 51], [32, 15, 67], [12, 41], [54, 36, 22]] The result is : [[12, 41], [34, 51], [54, 36, 22], [32, 15, 67]]ExplanationA method named ‘sort_sum’ is defined that takes a list ...
Read MoreHow to create facetted histograms using ggplot2 in R?
The facetted histograms are the separated histograms created for different categories in a single plot window. We can follow the below steps to create such type of histograms using ggplot2 −First of all, create the data frame.Load the ggplot2 package and create facetted histogram with the help of facet_grid function of ggplot2 package.Create the data frameLet's create a data frame as shown below −Group
Read MoreHow to remove interaction from regression model in stargazer in R?
To remove interaction from regression model in stargazer in R, we can follow the below steps −First of all, create a data frame.Then, create a regression model using stargazer.After that, create the regression model with stargazer without interaction terms.Create the data frameLet's create a data frame as shown below −x1
Read MoreHow to return the index of first unique character without inbuilt functions using C#?
Create an empty new array of length 256, traverse through the entire string character by character and increment the value in the new array. At the end traverse the entire array and return the first character that has value 1.Example 1aabccd -→2 1 2 1 → Return the first character which is having count 1. That is b.Example 2using System; namespace ConsoleApplication{ public class Arrays{ public int ReturnIndexOfFirstUniqueCharachter(string s){ int index = -1; int[] arrayValues = new int[256]; for (int i = 0; i ...
Read MoreHow to find the row sums by excluding a column in R data frame?
Suppose we have a numerical column in an R data frame that we do not want to include our analysis due to some characteristics such is similarity or distinction with the rest of the data then we might want to exclude that column from the analysis. One such situation would be finding the row sums by excluding a column. For this purpose, we can use the below steps −First of all, creating a data frame.Finding the row sums with the help of mutate function of dplyr package and setdiff function in base RCreate the data frameLet's create a data frame ...
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