About the course
In this course an overview is given of different phases of the data analysis pipeline using Python and its data analysis ecosystem. What is typically done in data analysis? We assume that data is already available, so we only need to download it. After downloading the data it needs to be cleaned to enable further analysis. In the cleaning phase the data is converted to some uniform and consistent format. After which the data can, for instance, be
- combined or divided into smaller chunks
- grouped or sorted,
- condensed into small number of summary statistics
- numerical or string operations can be performed on the data
The point is to manipulate the data into a form that enables discovery of relationships and regularities among the elements of data. Visualization of data often helps to get a better understanding of the data. Another useful tool for data analysis is machine learning, where a mathematical or statistical model is fitted to the data. These models can then be used to make predictions of new data, or can be used to explain or describe the current data.
Python is a popular, easy to learn programming language. It is commonly used in the field of data analysis, because there are very efficient libraries available to process large amounts of data. This so called data analysis stack includes libraries such of NumPy, Pandas, Matplotlib and SciPy that we will familiarize ourselves with during this course.
No previous knowledge of Python is needed as the course will start with a quick introduction to Python. It is however assumed that you have good programming skills in some language. In addition, linear algebra and probability calculus are prerequisites of this course. The course lasts for seven weeks and gives 5 credit units. It is recommended that you do this course in the end of bachelor degree or in the beginning of masters degree; preferably before the course “Introduction to Data Science”.
Conduct of the course
Refer to the official course page.
Note that this course requires a lot of work! Depending on your background it can take something between 5 to 20 hours per week. In addition to reading the course material, you sometimes may need to consult the online documentation of Python or its various libraries.
A Discord channel for the course has been opened. We recommend that you use the channel either through a web browser or the Discord desktop application.
You can reach the channel through this link: https://study.cs.helsinki.fi/discord/join/dap.
The discussion channel is based on peer support. The teachers of the course are participating in the discussion on voluntary basis if time permits.
Please try to avoid posting complete solutions or spoilers for exercises.
Credits and certificate
If you have a Finnish social security number you can get official study credits from the Open University of University of Helsinki if you take an exam after the course. If you don't have a Finnish social security number you can get a certificate after completing the course from here: https://www.mooc.fi/en/profile/completions.