Data Visualization (2 Marks Questinos)

1. Compare bar() and barh() function using examples.
2. What is the use of matplotlib and pyplot?
3. A list namely temp contains average temperatures for 7 days of last week. You want to see how temperature charged in last 7 days. Which chart type will you plot for the same and why? 
4. Write a program to draw a sin and cos graph (with 100 continuous observations) in the same line chart. 
5. Given an ndarray p as ([1,2,3,4]). Write code to plot a bar chart having bars for p and p**2 (with red color) and another bar for p vs p*2 (with blue color). Assume that libraries have been included.
6. Mr. Sanjay wants to plot a bar graph for the given set of values of subject on x-axis and number of students who opted for that subject on y-axis.
   Complete the code to perform the following :
• To plot the bar graph in statement 1
• To display the legends in the Graph in statement 2
  

  import matplotlib.pyplot as plt
  x=['Hindi', 'English', 'Science', 'SST']
  y=[10,20,30,40]
  _____________________ Statement 1
  _____________________ Statement 2
  

  Click Here for Solution
  
7. What will be the output of the following code:

   import matplotlib.pyplot as p
   x=[6,7,8,9,10]
   y=[60,40,55,30,70]
   p.title('Secondary Class Strength')
   p.xlabel('Class')
   p.ylabel('No. of students')
   p.bar(x,y)
   p.show()
   



8. Fill in the blank with appropriate pyplot methods:

   import matplotlib.pyplot as p
   Year=[2000,2002,2004,2006]
   Rate=[21.0,20.7,21.2,21.6]
   ____________________________        # To draw a line graph
   p.xlabel('Year')              
   p.ylabel('Rate')                
   p.title('Fuel Rates in every Two Year')                 
   ___________________(“Graph1.pdf”)   # To save the graph 
   p.show()
   



9. What is the structure of a histogram if cumulative attribute is set to be True.
10. Write a code to plot the speed of a passenger train as shown in the figure given below:
    
11. Mr. Sanjay wants to plot a bar graph for the given set of values of subject on x-axis and number of students who opted for that subject on y-axis.
    Complete the code to perform the following :
    
    • To plot the bar graph in statement 1
    • To display the graph in statement 2

    import matplotlib.pyplot as plt
    x=['Hindi', 'English', 'Science', 'SST']
    y=[10,20,30,40]
    _____________________ Statement 1
    _____________________ Statement 2
    



12. Mr. Harry wants to draw a line chart using a list of elements named LIST.
    Complete the code to perform the following operations:
    • To plot a line chart using the given LIST.
    • To give a y-axis label to the line chart named "Sample Numbers"

    import matplotlib.pyplot as PLINE
    LIST=[10,20,30,40,50,60]
    _____________________ Statement 1
    _____________________ Statement 2
    PLINE.show()

13. what is boxplot ? how do you create it in pyplot.
14. Write commands to plot the chart as per given instructions:
• Plot a line y=x+5 for 100 points of x in range -50 to 50.