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To create bar plot using ggplot2 with structure data, we need to set the stat argument of geom_bar function to identity. This is same for the regular data frame.For example, if we have a structured data frame called df that contains a column X for categories and a numerical column say Y for frequency then we can the bar plot for this data by using the below given command −ggplot(df,aes(X,Y))+geom_bar(stat="identity")ExampleFollowing snippet creates a sample data frame −df
Bubble Sort is one of the simplest sorting algorithms used to sort data by comparing the adjacent elements. All the elements are compared in phases. The first phase places the largest value at the end, the second phase places the second largest element at the second last position and so on till the complete list is sorted.Bubble Sort Algorithmint arr[5]= { 5, 4, 2, 1, 3 };int i, j ;Traverse from index i=0 to iarr[j] swap arr[i] with arr[j]EndRecursive Bubble SortIf array length is 1 then returnTraverse array once and fix largest element at the endRecursively perform step 2 for ... Read More
To display data frame name in ggplot2 graph title, we can use ggtitle function and pass the name of the data frame.For example, if we have a data frame called df that contains two columns say x and y and we can create a point chart between x and y then the plot with data frame name as title can be created by using the below mentioned command −ggplot(df,aes(x,y))+geom_point()+ggtitle("df")ExampleFollowing snippet creates a sample data frame −x
To check if any value in an R vector is greater than or less than a certain value, we can use any function.For Example, if we have a vector called V and we want to check if any value in V is greater than 100 then we can use the command given below −any(V>100)Similarly, we can check if any value is less than 100 by using the command as follows −any(V
To create a colored frame for ggplot2 graph, we can use theme function and set the plot.background argument to different color for rectangular element.For example, if we have a data frame called df that contains two columns say X and Y then we can create point chart between X and Y with blue colored frame of the plot using the below mentioned command −ggplot(df,aes(X,Y))+geom_point()+theme(plot.background=element_rect(colour="blue",size=3))ExampleFollowing snippet creates a sample data frame −x
To add title to regression model using stargazer, we can use title argument inside stargazer function.For example, if we have a model called Reg_Model with Output as text then the title to this model using stargazer can be added by using the below mentioned command −stargazer(Reg_Model,type="text",title="Regression Model between x and y")Example 1Following snippet creates a sample data frame −x
To delete a row from an R data frame if any value in the row is greater than n can be done by using the subsetting with single square brackets and negation operator. We will subset the values that are greater than n and then take the negation of the subset as shown in the below given examples.Example 1Following snippet creates a sample data frame −x1
To find the sum product of two matrix by row in R, we can use rowSums function by passing the multiplication of the matrices.For example, if we have two matrices say Matrix1 and Matrix2 then, the sum product of these two matrices by row can be found by using the following command −rowSums(Matrix1*Matrix2)Example 1Following snippet creates a matrix −M1
We are given a string type variable, let's say, str which will be used to store the source code then calculate the size of the string and pass it to the function. The task is to rearrange the given source code and then print the result.Let us see various input output scenarios for this −Input − string str ="#include using namespace std; int main()" "{ int sum, first, second; sum = first + second; printf(\"%d\", c);" " return 0;}"Output −#include using namespace std; int main(){ int sum, first, second; sum = first + second; printf("%d", ... Read More
To multiply each value in a column by a constant, we can use multiplication sign *.For example, if we have a data frame called df that contains a column say x. Now, if we want to multiply each value in x with 10 then we can use the below mentioned command −df$x