Question

In Statistics, a histogram is a graphical representation of data using bars of different heights. In a histogram, each bar groups numbers into ranges. Taller bars show that more data falls in that range. A histogram displays the shape and spread of continuous or discrete sample data.

In this project, you will write a program that creates a histogram that allows users to visually inspect the frequency distribution of a set of values.

REQUIREMENTS:

* Read from the data file the values in the range of 1-100 inclusive.

* Produce a histogram as shown in the expected output below to indicate how many input values fell in the range 1 to 10, 11 to 20, and so on.

EXPECTED OUTPUT:

run:

1-10 I*****

11-20 I******

21-30 I**

31-40 I*

41-50 I***********

51-60 I******

61-70 I********

71-80 I***

81-90 I****

91-100 I****

DATA FILE

51 68 42 61 23 50 79 9 12 9 67 85 64 97 41 13 66 47 54 2 46 48 11 52 79 48 73 48 51 15 44 97 19 48 53 13 58 47 95 2 1 65 84 28 89 99 70 67 84 36

Answer 1

import java.io.File;
import java.util.Scanner;

public class Histogram {
   public static void main(String[] args) throws Exception{
       int arr[]=new int[10];
       Scanner sc = new Scanner(new File("histogram.txt"));
       int n;
       while(sc.hasNext()) {
           n=sc.nextInt();
           if(n==100)
               arr[9]++;
           else
               arr[n/10]++;
       }
       String l[]= {"1-10|","11-20|","21-30|","31-40|","41-50|","51-60|","61-70|","71-80|","81-90|","91-100|"};
      
       for(int i=0;i<arr.length;i++) {
           System.out.print(l[i]+" ");
           for(int j=0;j<arr[i];j++) {
               System.out.print("*");
           }
           System.out.println();
       }
   }
}

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