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  3. Visualizing Time Series Data in Python

Exercise

Subset time series data

When plotting time series data, you may occasionally want to visualize only a subset of the data. The pandas library provides powerful indexing and subsetting methods that allow you to extract specific portions of a DataFrame. For example, you can subset all the data between 1950 and 1960 in the discoveries DataFrame by specifying the following date range:

subset_data = discoveries['1950-01-01':'1960-01-01']

Note: Subsetting your data this way is only possible if the index of your DataFrame contains dates of the datetime type. Failing that, the pandas library will return an error message.

Instructions 1/2

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  • Use discoveries to create a new DataFrame discoveries_subset_1 that contains all the data between January 1, 1945 and January 1, 1950.
  • Plot the time series of discoveries_subset_1 using a "blue" line plot.