Streff

ExerciseAnswers.py

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+#Loading iris.csv
+import pandas as pd
+iris=pd.read_csv('iris.csv')
+print iris
+#1 Imitate functionality of head
+file=iris
+x=3
+file.head(x)
+#or
+def head(x,y):
+    head=x.head(n=y)
+
+    return head
+head(iris,3)
+#2.1 Print the last 2 rows in the last 2 columns to the Python terminal
+iris.shape
+iris.iloc[148:150,3:5]
+#2.2 Get the number of observations for each species included in the data set
+iris['Species'].value_counts()
+#2.3 Rows with Sepal.Width>3.5
+iris[iris['Sepal.Width']>3.5]
+#2.4 Write the data for the species setosa to comma-delimited file names 'setosa.csv'
+setosa=iris[iris.Species.str.contains('setosa')]
+setosa
+setosa.to_csv('setosa.csv')
+Setosa=pd.read_csv('setosa.csv')
+Setosa
+#2.5 Calculate the mean, minimum, and maximum of Petal.Length for observations from virginica
+virginica=iris[iris.Species.str.contains('virginica')]
+virginica
+virginica['Petal.Length'].mean()
+virginica['Petal.Length'].min()
+virginica['Petal.Length'].max()