added ques 12 and 13

Author: itsanshulverma

_12/hist.png

@@ -0,0 +1,29 @@
+'''
+    12. Write a program that makes use of a function to accept a list of n integers and displays a histogram.
+    Author: Anshul Verma
+'''
+
+import matplotlib.pyplot as plt
+
+def inputList():
+    '''
+    To take a input of list of integers from user
+    Returns the list
+    '''
+    ls = []
+    length = int(input('Enter the length of list: '))
+    for i in range(0, length, 1):
+        ls.append(int(input('Enter element {}:'.format(i+1))))
+    # Using eval
+    # ls = eval(input('Enter the integers: '))
+    return ls
+
+if __name__ == "__main__":
+
+    list = inputList()
+    plt.hist(list, )
+    plt.xlabel('Integer')
+    plt.ylabel('Frequency')
+    plt.title('Histogram')
+    plt.savefig('hist.png', dpi=275, bbox_inches='tight') # To save the plot
+    plt.show()

_12/output.png

@@ -0,0 +1,77 @@
+'''
+    13. Write a program that makes use of a function to display sine, cosine, polynomial and exponential curves.
+    Author: Anshul Verma
+'''
+
+import matplotlib.pyplot as plt
+import math
+
+def sineCurve():
+    '''
+    To plot sine function
+    '''
+
+    plt.subplot(2, 2, 1)
+    degrees = range(0, 360 + 1)
+    sinValues = [math.sin(math.radians(i)) for i in degrees]
+    plt.plot(sinValues)
+    plt.xlabel('Degrees')
+    plt.ylabel('Sin Values')
+    plt.title('Sine Curve')
+    plt.grid()
+
+def cosineCurve():
+    '''
+    To plot cos function
+    '''
+
+    plt.subplot(2, 2, 3)
+    degrees = range(0, 360 + 1)
+    cosValues = [math.cos(math.radians(i)) for i in degrees]
+    plt.plot(degrees, cosValues)
+    plt.xlabel('Degrees')
+    plt.ylabel('Cosine Values')
+    plt.title('Cosine Curve')
+    plt.grid()
+
+def polynomialCurve():
+    '''
+    To plot a polynomial function
+    '''
+    def polynomial(x):
+        return (8*x*x)
+    plt.subplot(2, 2, 2)
+    x = range(-51, 50 + 2)
+    y = [polynomial(i) for i in x]
+    plt.plot(x, y)
+    plt.xlabel('x')
+    plt.ylabel('y = 8x^2')
+    plt.title('Polynomial Curve')
+    plt.grid()
+
+def expCurve():
+    '''
+    To plot sine function
+    '''
+
+    plt.subplot(2, 2, 4)
+    x = []
+    for i in range(0, 100*10):
+        x.append((-5) + (0.01)*i)
+    y = [math.exp(i) for i in x]
+    plt.plot(x, y)
+    plt.xlabel('x')
+    plt.ylabel('y = e^x')
+    plt.title('Exponetial Curve')
+    plt.grid()
+
+if __name__ == "__main__":
+    plt.figure(figsize=(9, 5)) # To set the figure size
+    sineCurve()
+    cosineCurve()
+    polynomialCurve()
+    expCurve()
+    plt.tight_layout()
+    plt.savefig('plot.png', dpi=275, bbox_inches='tight') # To save the plot
+    plt.show()
+