Day #17 - Python Basics

	#Example #1 - numpy version
	import numpy as np
	np.version.version
	#Shift+Enter Command
	#Example #2 - Vector of 10 null elements
	import numpy as np
	x = np.zeros(10)
	x
	#Example #3 - one element not null
	import numpy as np
	x = np.zeros(10)
	x[4] = 1
	x
	#Example #4 - vector of range of values
	import numpy as np
	x = np.arange(10,49,1)
	x
	#Example #5 - Reverse Vector
	import numpy as np
	x = np.arange(10,49,1)
	xrev = x[::-1]
	xrev
	#Example #6 - 3 x 3 matrix
	#[0..8]
	import numpy as np
	a = np.matrix('0,1,2;3,4,5;6,7,8')
	a
	#Example #7 - Indices of non zero elements
	import numpy as np
	a = [1,2,0,0,4,0]
	aval = np.nonzero(a)[0]
	print(aval)
	#Example #8 - 3 x 3 Identity matrix
	import numpy as np
	a = np.eye(3, dtype=int)
	a
	#Example #9 - 3 x 3 x 3 array of random values
	import random
	import numpy as np
	n = 3
	a = np.random.random((n,n,n))
	a
	#Also found this link are doing the exercise - http://www.labri.fr/perso/nrougier/teaching/numpy.100/

view raw pythonexamples.py hosted with ❤ by GitHub

	import matplotlib.pyplot as plt
	#Declare Dictionary
	result = {}
	#Populate Data
	for i in range(1,100,1):
	result[i] = (i,i*9)
	#Approach #1
	print 'Approach #1'
	for i in range(1,100,1):
	(key,value) = result[i]
	print(key)
	print(value)
	#Approach #2
	print 'Approach #2'
	for key, value in result.iteritems():
	print key
	print value[1]
	#Plot the line
	def plotgraph(result):
	for key, value in result.iteritems():
	print key
	print value[1]
	plt.plot(key, value[1],'-o')
	plt.xlabel("x Values")
	plt.ylabel("Y Value")
	plt.title("Plot Graph")
	plt.show()
	plotgraph(result)

view raw DictionaryExample.py hosted with ❤ by GitHub

Happy Learning!!!