Question

I need assistance with coding, in RStudio 3.5.2

Consider the iris dataset. It has 150 rows and 5 columns and contains measurements in centimeters of the variables sepal length and width and petal length and width, respectively, for 50 flowers from each of 3 species of iris. The species are Iris setosa, versicolor, and virginica. head(iris, 3) ## Sepal.Length Sepal.Width Petal.Length Petal.Width Species ## 1 5.1 3.5 1.4 0.2 setosa ## 2 4.9 3.0 1.4 0.2 setosa ## 3 4.7 3.2 1.3 0.2 setosa Using the ggplot2 package, a) write code to create a scatter plot of Petal.Length versus Petal.Width, with the variable Species mapped to color; b) add appropriate title to the plot; c) write code to create side by side box plots of Sepal.Length for each specie of iris.

This is what I have so far what am I missing?

ggplot(data = iris)+

geom_point(mapping = aes (x = Petal.Length, y = Petal.Width))+

facet_grid(~Species, scales = "free")

Answer 1

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct node{
   char name[100];
   float marks;
   struct node *next;
};

void printlist(struct node *h){
   while (h!=NULL){
       printf("\nName : ");
       puts(h->name);
       printf("Marks = %.2f\n",h->marks);
       h = h->next;
   }
}
int main(){
   struct node *start = NULL;
   int len,i,a,b=0;
   printf("Enter the no.of students in the class:");
   scanf("%d",&len);
   for(i=0;i<len;i++){
       getchar();
       struct node *newNode = (struct node *)malloc(sizeof(struct node));
       printf("\nEnter name : ");
       gets(newNode->name);
       printf("Enter marks : ");
       scanf("%f",&newNode->marks);
       newNode->next = NULL;
       if(start==NULL)
           start = newNode;
       else{
           struct node *pt = start;
           while(pt->next != NULL)
               pt = pt->next;
           pt->next = newNode;
       }
   }
   printlist(start);
   struct node *ptr = start;
   while(ptr!=NULL){
       if(b<ptr->marks)
           b=ptr->marks;
       ptr = ptr->next;
   }
   printf("\nTopper(s) of the class is:\n");
   while(start!=NULL){
       if(b==start->marks){
           puts(start->name);
       }
       start = start->next;
   }
}