Overview matplotlib is the workhorse of data science visualization. The module pyplot gives us MATLAB like plots. You can install it via pip install matplotlib The most basic plot is done with the “plot”-function. It looks like this: import matplotlib.pyplot as plt plt.plot([0, 1, 2, 3], [0, 1, 2, 3]) plt.show() The plot function takes…
When you area already familiar with the basic plot from the introduction to matplotlib here is another type of plot used in data science. A very basic visualization is the scatter plot: import numpy as np import matplotlib.pyplot as plt N = 100 x = np.random.rand(N) y = np.random.rand(N) plt.scatter(x, y) plt.show() Color of the…
What is Feature Scaling? Feature Scaling is an important pre-processing step for some machine learning algorithms. Imagine you have three friends of whom you know the individual weight and height. You would like to deduce Christian’s t-shirt size from David’s and Julia’s by looking at the height and weight. Name Height in m Weight in…
The author Jurgen Appelo is “an entrepreneur, speaker, and writer pioneering leadership to help innovative businesses survive and thrive in the 21st century.” The book This book is a beast! On almost 400 pages divided into 16 chapters Jurgen lays the foundation for his Management 3.0 concept. Chapter 1 Marty the M3.0 monster 6 views…
When You are working with different operating systems you encounter different line endings. Editing a file on a Linux system and opening it on a windows machine can give a weird result. Here is a short overview which system uses which command characters: OS Command character Windows CR + LF Linux LF Mac OS <=…
ROC Curve As we already introduced Precision and Recall the ROC curve is another way of looking at the quality of classification algorithms. ROC stands for Receiver Operating Characteristic The ROC curve is created by plotting the true positive rate (TPR) on the y-axis against the false positive rate (FPR) on the x-axis at various…
Location Humans are creatures of habit! Because I attendend the BarCamp 2017 at Uni Würzburg I went straight to the M2 building. I should’ve read my emails more thoroughly, actually building Z6 of University Würzburg was this event’s location. And the campus is quite large so I had to walk a bit. Bummer! The Sessions…
To setup the SD Card on MacOS follow these steps Download the Raspbian Image Insert the SD-Card into the reader Open a terminal Find out the device’s name by typing diskutil list Erase the contents / format card to FAT32 sudo diskutil eraseDisk FAT32 RASPBIAN MBRFormat /dev/disk2 sudo diskutil unmountDisk /dev/disk2 Copy image to card…
Pandas is a data analyzing tool. Together with numpy and matplotlib it is part of the data science stack You can install it via pip install pandas Working with real data The data set we are using is the astronauts data set from kaggle: Download Data Set NASA Astronauts from Kaggle During this introduction we…
