Classification Where y is a discrete value Develop the logistic regression algorithm to determine what class a new input should fall into Classification problems Email -> spam/not spam? Online transactions -> fraudulent? Tumor -> Malignant/benign Variable in these problems is Y Y is either 0 or 1 0 = negative class (absence of something) Read more…
Linear regression with multiple features Multiple variables = multiple features In original version we had X = house size, use this to predict y = house price If in a new scheme we have more variables (such as number of bedrooms, number floors, age of the home) x1, x2, x3,x4 are the four features Read more…
Matrices – overview Rectangular array of numbers written between square brackets 2D array Named as capital letters (A,B,X,Y) Dimension of a matrix are [Rows x Columns] Start at top left To bottom left To bottom right R[r x c] means a matrix which has r rows and c columns Is a [4 Read more…
Introduction to the course We will learn about State of the art How to do the implementation Applications of machine learning include Search Photo tagging Spam filters The AI dream of building machines as intelligent as humans Many people believe best way to do that is mimic how humans learn What the course covers Learn about state Read more…
Author : Peter Elkind, Bethany McLean Effect : Bankrupcy of the US energy, commodities and services company “Enron corporation” and the dissolution of Arthur Andersen (audit + accounting). Founded in 1985 by Kenneth Lay : Merger of two natural gas transmission companies : Houston Natural Gas corporation and InterNorth inc, renamed Read more…
Author : Mark A. McDaniel and Peter C. Brown To learn retrieve Practice at retrieving new knowledge or skill from memory is a potent tool for learning and for durable retention. Effortful retrieval makes for stronger learning. Delaying subsequent retrieval practice is better. Repeated retrieval improves availability of the information Read more…
We land at the airport of Zanzibar where we pick up our luggage in the crowd (no conveyor belt, the luggage is just thrown in a room, as it is often the case in small airports), our driver that we ordered from our hotel is waiting for us. We chose Read more…
It is tired that we start the second stage of our journey: the Safaris. In the morning our new guide comes to pick us up at the hotel, we meet him and and our cook (Mr Delicious), they will be our companions for the next week. We load our suitcases Read more…
In the summer of 2015 we went to Tanzania. Tanzania is a large country, very undeveloped but with some amazing things to see. Such a trip requires some organization in order to optimize the limited time we have there. We have segmented the trip in 3 parts, one week each. Read more…
It’s quite difficult to find the right time to visit Vietnam since it rains a lot and when it’s sunny in the south it’s ugly in the north and vice versa. We went in July and we were actually lucky with the weather. We got the sun when it was Read more…