add exercises

exercises/README.md

@@ -0,0 +1,33 @@
+# Julia for Data Analysis
+
+This folder contains additional exercises to the book
+["Julia for Data Analysis"](https://www.manning.com/books/julia-for-data-analysis?utm_source=bkamins&utm_medium=affiliate&utm_campaign=book_kaminski2_julia_3_17_22)
+that is written by Bogumił Kamiński and is planned to be published in 2022
+by [Manning Publications Co.](https://www.manning.com/).
+
+The exercises were prepared by [Bogumił Kamiński](https://github.com/bkamins) and [Daniel Kaszyński](https://www.linkedin.com/in/daniel-kaszy%C5%84ski-3a7807113/).
+
+For each book chapter you can find 10 additional exercises with solutions.
+The exercises are meant for self study and are not discussed in the book.
+
+The exercises contained in this folder have varying level of difficulty. The
+problems for the first few chapters are meant to be relatively easy, however you
+might find exercises for the last chapters more challenging (if you are learning
+Julia I still encourage you to try these exercises and walk through the
+solutions trying to understand them). In particular, in some exercises I, on
+purpose, require using more functionalities of Julia ecosystem that is covered
+in the book. This is meant to teach you how to use help and documentation,
+as this is a very important skill to master.
+
+The files containing exercises have a naming convention `execricesDD.md`, where
+`DD` is book chapter number for which the exercises were prepared.
+
+All the exercises should be possible to solve using project environment setting
+that is used in the whole book (please check the global README.md file of this
+repository for details).
+
+---
+
+*Preparation of these exercises have been supported by the Polish National Agency for Academic Exchange under the Strategic Partnerships programme, grant number BPI/PST/2021/1/00069/U/00001.*
+
+![SGH & NAWA](logo.png)