Question

*Python
Draw a bargraph of English letter frequency
Also save the bargraph in a file

# (1) import necessary modules/packages/libaries

# A dictionary containing the information of English letter frequency
freq = {'a':8.17, 'b':1.49, 'c':2.2, 'd':4.25, 'e':12.7,
'f':2.23, 'g':2.02, 'h':6.09, 'i':7.0, 'j':0.15,
'k':1.29, 'l':4.02, 'm':2.41, 'n':6.74, 'o':7.5,
'p':1.92, 'q':0.09, 'r':5.99, 's':6.33, 't':9.36,
'u':2.75, 'v':0.98, 'w':2.56, 'x':0.15, 'y':1.99,
'z':0.08}

labels = []
data = []

# (2) extract data from dictionary freq to make two lists:
# labels contains all keys
# data contains all values

# set up for parameters for bargraph
width = 1
xlocations = np.array(range(len(data)))+width

# (3) call bar() function passing xlocation and data

# set up for y and x ticks and its position
plt.yticks(range(0, 15))
plt.xticks(xlocations, labels)
plt.xlim(0, xlocations[-1]+width)

# (4) set up for title of bargraph
# (5) save the figure in a file
# (6) display the figure

Answer 1

Answer:

Raw code:

#importing requried modules
import numpy as np
from matplotlib import pyplot as plt

#given data
freq = {'a':8.17, 'b':1.49, 'c':2.2, 'd':4.25, 'e':12.7,
'f':2.23, 'g':2.02, 'h':6.09, 'i':7.0, 'j':0.15,
'k':1.29, 'l':4.02, 'm':2.41, 'n':6.74, 'o':7.5,
'p':1.92, 'q':0.09, 'r':5.99, 's':6.33, 't':9.36,
'u':2.75, 'v':0.98, 'w':2.56, 'x':0.15, 'y':1.99,
'z':0.08}
#declaring variables
labels = []
data = []

labels = list(freq.keys()) #getting keys from freq dic
data = list(freq.values()) #getting values from freq dic
width = 1 #declaring width
xlocations = np.array(range(len(data)))+width #xlocations for graph
plt.bar(xlocations,data) #call bar method with xlocations and data as parameters
plt.yticks(range(0, 15)) #setting yticks for graph (count)
plt.xticks(xlocations, labels) #setting xticks for graph (alphabets)
plt.xlim(0, xlocations[-1]+width) #setting x limit
plt.title("English letter frequency") #setting title
plt.savefig("frequency.png") # saving figure
plt.show() # showing graph

note: please make sure that the indentation must be as like in the screen shots of my editor.

code:

out put:

saved file:

Feel free to ask doubts in the comment section.

Please do upvote.

Thank you.