CBSE Class 12 Computer Science Data Visualization Using Pyplot Assignment

Very Short Answer Type Questions :

Question: Name the interface of matplotlib used for drawing 2-D graphs.
Answer: pyplot

Question: Which function is used to add title to plot?
Answer: title()

Question: Which function is used to label axes in a plot?
Answer: xlabel() and ylabel()

Question: What is visualization of Data? How to use Pyplot for it?
Answer: Data visualization is the discipline of trying to understand data by placing it in a visual context so that patterns, trends and correlations that might not otherwise be detected can be exposed.

Question: What is bar chart?
Answer: Bar chart is a graphical display of dat using bars of different heights.

Question: Which function is to be use for draw a line in Pyplot Python?
Answer: plot()

Question: Which function is to be use for draw bar chart in Pyplot Python?
Answer: bar()

Question: What is pie chart?
Answer: Pie chart is a type of graph in which circle is divided into sectors that represent proportion of the whole.

Question: Which packages of Python is use to draw 2-D graphics?
Answer: Matplotlib

Question: Which function is to be use for draw pie chart in Pyplot Python?
Answer: pie()

Short Answer Type Questions :

Question: Why is following code giving error?
a=range(1,10,2)
b=range(10,100,10)
matplotlib.pyplot.plot(a,b)
Answer: the above code is producing error because two sequences a and b do not match in shape. List a is having 5 values and b list is having 9 values.

Question: Write the python program to plot pie chart for share=[17.4,25,5.2,35.2] and Zones=[‘North’,’South’,’East’,’West’].
Answer: import matplotlib.pyplot as plt
share=[17.4,25,5.2,35.2]
Zones=[‘North’,’South’,’East’,’West’]
plt.pie(share,labels=Zones)
plt.show()

Question: Write the python code to plot bar chart for sales in different cities.
Answer: import matplotlib.pyplot as plt
p1 = [‘Agra’,’Delhi’,’Kolkata’,’Chennai’]
p2 = [10,23,19,26]
plt.xlabel(‘Cities’)
plt.ylabel(‘Sales figure in Lakhs’)
plt.bar(p1,p2)
plt.show()

Question: Write the python program to create line chart for 10x+4.
Answer: import matplotlib.pyplot as plt
X=[1,2,3,4]
Y=10*X+4
plt.plot(X, Y)
plt.show()

Question: Write the python program to create bar plot for class and its strength.
Answer: import matplotlib.pyplot as plt
C=[‘X’,’XI’,’XII’]
S=[160,152,136]
plt.xlabel(‘Classes’)
plt.ylabel(‘Strength’)
plt.bar(C,S)
plt.show()

Question: Write the python program to plot pie chart of popular languages among students.
Answer: import matplotlib.pyplot as plt
Labels=[‘.Net’,‘Python’,’C++’,Java’]
Sizes=[190,250,200,230]
plt.pie(Sizes,labels=Labels)
plt.show()

Question: How to use Pyplot for visualization of Data?
Answer: import matplotlib.pyplot as plt
x=[1,2,3,4]
y=[20,30,40,50]
plt.plot(x, y)
plt.show()

Question: Write the python program to plot pie chart for share=[29,30,21,13,7] and
stream=[‘SCIENCE’,’HUMANITIES’,’COMMERCE’,’VOCATIONAL,’FMM’].
Answer: import matplotlib.pyplot as plt
share=[29,30,21,13,7]
stream=[‘SCIENCE’,’HUMANITIES’,’COMMERCE’,’VOCATIONAL,’FMM’].
plt.pie(share,labels=stream)
plt.show()

Question: What is line graph? Write the python code for line graph.
Answer: Line chart is a type of chart which displays information as a series of data points called markers connected by straight line segments.
import matplotlib.pyplot as plt
p1 = [1,20]
p2 = [6,70]
plt.plot(x, y)
plt.show()