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Author: sandhyac0203

Python Pandas - Series.py

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+
+# coding: utf-8
+
+# ### Create Series
+
+# In[2]:
+
+
+# Create an empty series
+
+import pandas as pd
+s= pd.Series()
+print(s)
+
+
+# In[4]:
+
+
+# Example 1 : Create a series from an ndarray
+
+import pandas as pd
+import numpy as np
+
+# Array is created from a list
+data=np.array(['a','b','c','d'])
+
+# A series is created from the array with the default index
+s=pd.Series(data)
+print (s)
+
+
+# In[5]:
+
+
+# Example 2 : Create a series from an ndarray
+
+import pandas as pd
+import numpy as np
+
+# Array is created from a list
+data=np.array(['a','b','c','d'])
+
+# A series is created from the array with the default index
+s=pd.Series(data,index=[100,101,102,103])
+print (s)
+
+
+# ### Create a series from a dictionary
+
+# In[8]:
+
+
+# Create a series from a dictionary
+
+import pandas as pd
+import numpy as np
+
+# Declare a dictionary wuth keys 'a','b','c'
+aDict={'a':0.,'b':1.,'c':2.}
+
+# Create a series from this dictionary
+s=pd.Series(aDict)
+print (s)
+
+
+# In[10]:
+
+
+# Create a series from a dictionary
+
+import pandas as pd
+import numpy as np
+
+# Declare a dictionary wuth keys 'a','b','c'
+data={'a':0.,'b':1.,'c':2.}
+
+# Create a series from this dictionary with specific indices
+# The dict has only three items
+s=pd.Series(data,index=['b','c','d','a'])
+print (s)
+
+
+# ### Create a series from scalar values
+
+# In[12]:
+
+
+# Create a series from scalar values
+
+import pandas as pd
+import numpy as np
+
+# Create a series
+s=pd.Series(5,index=[0,1,2,3])
+print (s)
+
+
+# ### Accessing Data from Series with Position
+# 
+# 
+
+# In[13]:
+
+
+# Data in the series can be accessed similar to that in ndarray
+
+import pandas as pd
+s=pd.Series([1,2,3,4,5],index=['a','b','c','d','e'])
+
+#retrieve the first element
+print(s[0])
+
+
+# In[14]:
+
+
+import pandas as pd
+s=pd.Series([1,2,3,4,5],index=['a','b','c','d','e'])
+
+#retrieve the first 3 elements from 0 -3 not including 3
+# retrieve 0,1,2
+print(s[:3])
+
+print('\n')
+
+#retrieve the last 3 elements 
+print(s[-3:])
+
+print('\n')
+
+#retrieve a single element at a specific index
+print(s['a'])
+print('\n')
+
+#retrieve multiple elements using a list of index labels
+print(s[['a','c','d']])
+