[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 4 pm10 Particulate matter less than 10 micrometers Malta National Bank Malta OH 6629 ˓→ North Valley Bank May 3, 2001 560 First Alliance Bank & Trust Co. Manchester NH 34264 Southern New ˓→Hampshire Bank & Trust February 2, 2001 561 National State Bank 501 Malta National Bank Malta ... May 3, 2001 ˓→November 18, 2002 502 First Alliance Bank & Trust Co. Manchester ... February 2, 2001 ˓→February 18, 2003 503 National State Bank of Metropolis Metropolis

[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 4 pm10 Particulate matter less than 10 micrometers Malta National Bank Malta OH 6629 ˓→North Valley Bank May 3, 2001 558 First Alliance Bank & Trust Co. Manchester NH 34264 Southern New ˓→Hampshire Bank & Trust February 2, 2001 559 National State Bank Bank Malta OH ... ˓→ North Valley Bank May 3, 2001 November 18, 2002 502 First Alliance Bank & Trust Co. Manchester NH ... Southern New ˓→Hampshire Bank & Trust February 2, 2001 February 18, 2003 503 National

[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 4 pm10 Particulate matter less than 10 micrometers Malta National Bank Malta OH 6629 ˓→North Valley Bank May 3, 2001 558 First Alliance Bank & Trust Co. Manchester NH 34264 Southern New ˓→Hampshire Bank & Trust February 2, 2001 559 National State Bank Malta OH 6629 ˓→ North Valley Bank May 3, 2001 November 18, 2002 502 First Alliance Bank & Trust Co. Manchester NH 34264 Southern New ˓→Hampshire Bank & Trust February 2, 2001 February 18, 2003 503

[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 4 pm10 Particulate matter less than 10 micrometers 502 Malta National Bank Malta ... May 3, 2001 ˓→November 18, 2002 503 First Alliance Bank & Trust Co. Manchester ... February 2, 2001 ˓→February 18, 2003 504 National State Bank of Metropolis Metropolis 502 Malta National Bank Malta ... May 3, 2001 ˓→November 18, 2002 503 First Alliance Bank & Trust Co. Manchester ... February 2, 2001 ˓→February 18, 2003 504 National State Bank of Metropolis Metropolis

[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 4 pm10 Particulate matter less than 10 micrometers 501 Malta National Bank Malta ... May 3, 2001 ˓→November 18, 2002 502 First Alliance Bank & Trust Co. Manchester ... February 2, 2001 ˓→February 18, 2003 503 National State Bank of Metropolis Metropolis 501 Malta National Bank Malta ... May 3, 2001 ˓→November 18, 2002 502 First Alliance Bank & Trust Co. Manchester ... February 2, 2001 ˓→February 18, 2003 503 National State Bank of Metropolis Metropolis

[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 (continues on next page) 50 Chapter 1. Getting Malta OH ... ␣ ˓→North Valley Bank May 3, 2001 November 18, 2002 503 First Alliance Bank & Trust Co. Manchester NH ... Southern New␣ ˓→Hampshire Bank & Trust February 2, 2001 February 18, 2003 504 Malta OH ... ␣ ˓→North Valley Bank May 3, 2001 November 18, 2002 503 First Alliance Bank & Trust Co. Manchester NH ... Southern New␣ ˓→Hampshire Bank & Trust February 2, 2001 February 18, 2003 504

[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 (continues on next page) 50 Chapter 1. Getting Malta OH 6629 ␣ ˓→ North Valley Bank May 3, 2001 November 18, 2002 503 First Alliance Bank & Trust Co. Manchester NH 34264 Southern New␣ ˓→Hampshire Bank & Trust February 2, 2001 February 18, 2003 504 Malta OH 6629 ␣ ˓→ North Valley Bank May 3, 2001 November 18, 2002 503 First Alliance Bank & Trust Co. Manchester NH 34264 Southern New␣ ˓→Hampshire Bank & Trust February 2, 2001 February 18, 2003 504

[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 (continues on next page) 50 Chapter 1. Getting data analysis toolkit, Release 1.4.4 (continued from previous page) 560 First Alliance Bank & Trust Co. Manchester NH ... Southern New␣ ˓→Hampshire Bank & Trust February 2, 2001 4647 561 National State In [133]: plt.figure(); In [134]: ax = df.plot(secondary_y=["A", "B"]) In [135]: ax.set_ylabel("CD scale"); In [136]: ax.right_ax.set_ylabel("AB scale"); 728 Chapter 2. User Guide pandas: powerful

[23]: air_quality_parameters.head() Out[23]: id description name 0 bc Black Carbon BC 1 co Carbon Monoxide CO 2 no2 Nitrogen Dioxide NO2 3 o3 Ozone O3 (continues on next page) 50 Chapter 1. Getting data analysis toolkit, Release 1.4.2 (continued from previous page) 560 First Alliance Bank & Trust Co. Manchester NH ... Southern New␣ ˓→Hampshire Bank & Trust February 2, 2001 4647 561 National State 502 Malta National Bank Malta ... May 3, 2001 ␣ ˓→November 18, 2002 503 First Alliance Bank & Trust Co. Manchester ... February 2, 2001 ␣ ˓→February 18, 2003 504 National State Bank of Metropolis Metropolis

Contributing section has been added. • Even though it may only be of interest to devs, we <3 our new CI status page: ScatterCI. Warning: 0.13.1 fixes a bug that was caused by a combination of having numpy clone your fork to your machine: git clone git@github.com:your-user-name/pandas.git pandas-yourname cd pandas-yourname git remote add upstream git://github.com/pydata/pandas.git This creates the directory run automatically on Travis-CI once your Pull Request is submitted. However, if you wish to run the test suite on a branch prior to submitting the Pull Request, then Travis-CI needs to be hooked up to your