# Oct 2019 / Practical R and Python data analysis¶

Part of Scientific Computing in Practice lecture series at Aalto University.

Audience: Researchers who are or will soon be using R and Python for data analysis, who know a bit about these languages but haven’t studied best practices for data analysis in them. We do not assume familiarity with R (but some sort of knowledge of programming), but do assume a small amount of Python.

About the course: We provide a practical introduction and advice for data analysis in R and Python. The primary lessons will be in libraries and visualization in these languages (the data frame in R and pandas in Python) and optimizing data storage and access. Side lessons will include data storage formats, Jupyter notebooks, Triton and HPC for data processing, optimization of time and memory usage, profiling, workflow automation, and overall good practices. The course is suited both for beginners and those already using these tools but feel they should be better. Material will be divided approx. into two equal parts, 3 sessions of R and 3 sessions of Python. The two haves will cover similar information and concepts, so you may choose to only come to one part (see below). With lots of demos and hands-on exercises to try on your own.

Lecturer: Janne Blomqvist, D. Sc., Science IT / Department of Applied Physics, Richard Darst, Ph. D., Science IT / Department of Computer Science, Simo Tuomisto, Science IT / Department of Computer Science

Time, date:

• Mon 30.9, 12:00-15:00 (Python)
• Thu 3.10, 12:00-15:00 (Python)
• Mon 7.10, 12:00-15:00 (Python)
• Thu 10.10, 12:00-15:00 (R)
• Mon 14.10, 12:00-15:00 (R)
• Thu 17.10, 12:00-15:00 (R)

Place: Otakaari 1, U135a (the auditorium next to Cafe Elissa in the main building)

Cost: Free of charge for FGCI consortium members including Aalto employees and students.

Registration: registration is open

Credits: Credits available for the Aalto students and course certificate can be provided on request for the outsiders. Full course hours correspond roughly to 1 ECTS. Students who wish to get a certificate should hand in the homework assignments and participate to at least 4 of 6 lectures.

Other comments: During the tutorials we’ll use jupyter.cs.aalto.fi and jupyter.triton.aalto.fi. It’s also good to have an SSH client installed. Participants are expected to bring their own laptops.

Additional course info at: janne.blomqvist -at aalto.fi, richard.darst -at- aalto.fi, simo.tuomisto -at- aalto.fi

Course preparation

This course will use https://jupyter.cs.aalto.fi and https://jupyter.triton.aalto.fi . You will need an Aalto account.

Course material

You can find our git repository at https://github.com/AaltoSciComp/python-r-data-analysis-course. Note that it is a work in progress and until (and even after) something has been presented, it may still change. The links below go to the “raw” notebooks, and you can find the work and “solutions” we have done in class in the classwork-2019 branch. By day, we have covered:

• Day 1: Python
• 01_Course_intro_and_Jupyter.ipynb
• 02_Jupyter_demo_pi.ipynb
• python/01_Python_intro.ipynb
• python/02_Python_data_types_and_structures.ipynb
• python/03_Numpy.ipynb
• Day 2: Python
• python/03_Numpy.ipynb
• python/10_Tidy_data.ipynb
• python/04_Pandas.ipynb (or moved to the next day)
• Time handling
• Day 3: Python, plotting
• python/04_Pandas.ipynb (continuing from previous lecture)
• python/05_Python_IO.ipynb
• python/06_Pandas_split_apply_combine.ipynb
• python/08_Profiling_and_debugging.ipynb (if time allows)
• python/09_Matplotlib.ipynb
• Presentation of homework exercises (if time allows)
• Day 4: R
• Day 5: R
• Day 6: R

To get the repository:

git clone https://github.com/AaltoSciComp/python-r-data-analysis-course/


To set up the git merge and diff hooks (Triton magic), copy and paste these inside the repository:

/share/apps/jupyterhub/live/miniconda/bin/nbdime config-git --enable
sed --in-place -r 's@(= )[ a-z/-]*(git-nb)@\1/share/apps/jupyterhub/live/miniconda/bin/\2@' .git/config


Homework

The homework is in the git repository in the /homework directory. A README file in that directory explains the instructions: just take each notebook as a starting point and try to solve the exercise inside of it. The deadline to return is 15.11 (middle of November) at 12:00. To return, create a repository at version.aalto.fi and send Janne a link to a commit in the repo (make sure to share it with Janne first!). If you don’t have an Aalto account, you can send a .tar.gz or .zip archive to Janne as attachment via email, or create a repo e.g. on gitlab.com (make sure to make it private, and share it with Janne only!).

Update: For exercise 4, the ntsb.gov site is down, so we have mirrored the data needed at: https://users.aalto.fi/~tuomiss1/rcourse/elfaro.kmz