Python Part 5: Matplotlib

Question 1

import matplotlib

Answer 1

import matplotlib.pyplot as plt

Question 2

Plot a diagram showing points from two arrays, x and y, drawn with a red line and showing the datapoints, with a label.

Answer 2

plt.plot(x,y, ‘ro-‘, label = ‘Stevie’)

Question 3

add a legend

Answer 3

plt.legend()

Question 4

add a legend in the upper left of a diagram

Answer 4

plt.legend(loc = ‘upper left’ )

Question 5

add a title, first plot, with the font size 40

Answer 5

plt.title(‘first plot’,fontsize=40)

Question 6

add labels for the x and y axes

Answer 6

plt.xlabel(‘x axis’,fontsize=18)
plt.ylabel(‘y axis’)

Question 7

plot a histogram

Answer 7

plt.hist(data,30,color=’r’,density=True)

Question 8

plot a pie chart

Answer 8

plt.pie(y,labels=dataLabels)

Question 9

Plot a scatterplot

Answer 9

x=np.arange(100)
y=4.0-0.02*x+np.random.normal(size=100)

plt.scatter(x,y)
plt.show()